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Yang X, Zheng R, Wan Z, Zhang Z. Differences of soil carbon pools and crop growth across different typical agricultural fields in China: The role of geochemistry and climate change. ENVIRONMENTAL RESEARCH 2024; 260:119623. [PMID: 39019140 DOI: 10.1016/j.envres.2024.119623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 07/06/2024] [Accepted: 07/14/2024] [Indexed: 07/19/2024]
Abstract
Carbon storage and the aboveground biomass of farmland provide practical significance for understanding global changes and ensuring food production and quality. Based on soil carbon storage, aboveground biomass, climate, geochemistry, and other data from 19 farmland ecological stations in China, we analysed the distribution characteristics of farmland carbon storage in topsoil and aboveground biomass. We notably revealed the response direction and degree of climate and geochemical factors to farmland carbon storage in topsoil and aboveground biomass. The results indicated that the average carbon stocks of farmland in different regions ranged from 0.28 to 7.91 kg m-2, the average fresh weight of the aboveground biomass (FAB) ranged from 1370.64 to 5997.28 g m-2, and the average dry weight of the aboveground biomass (DAB) ranged from 119.95 to 852.35 g m-2. The least angle regression (LARS) and the best subsection selection regression (BSS) showed that evapotranspiration and extreme low temperatures were significant climatic factors affecting carbon sequestration and aboveground biomass on long-time scales. The linear mixed-effects model (LMM) further showed that AN and AP had significant long-term effects on carbon sequestration and aboveground biomass (p < 0.05), with AN having the highest contribution to SOC%, FAB, and DAB. The structural equation model (SEM) showed that carbon sequestration and aboveground biomass in agricultural fields were significantly positively correlated (p < 0.05). Moreover, the climate had a less direct contribution to carbon sequestration and above-ground biomass compared to geochemistry (PCc < 0.1
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Affiliation(s)
- Xiuyuan Yang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Ruyi Zheng
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Zuyan Wan
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Zhenming Zhang
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, Guizhou, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang, 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang, 550025, China.
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2
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Nair GR, Kooverjee BB, de Scally S, Cowan DA, Makhalanyane TP. Changes in nutrient availability substantially alter bacteria and extracellular enzymatic activities in Antarctic soils. FEMS Microbiol Ecol 2024; 100:fiae071. [PMID: 38697936 PMCID: PMC11107947 DOI: 10.1093/femsec/fiae071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 03/07/2024] [Accepted: 05/01/2024] [Indexed: 05/05/2024] Open
Abstract
In polar regions, global warming has accelerated the melting of glacial and buried ice, resulting in meltwater run-off and the mobilization of surface nutrients. Yet, the short-term effects of altered nutrient regimes on the diversity and function of soil microbiota in polyextreme environments such as Antarctica, remains poorly understood. We studied these effects by constructing soil microcosms simulating augmented carbon, nitrogen, and moisture. Addition of nitrogen significantly decreased the diversity of Antarctic soil microbial assemblages, compared with other treatments. Other treatments led to a shift in the relative abundances of these microbial assemblages although the distributional patterns were random. Only nitrogen treatment appeared to lead to distinct community structural patterns, with increases in abundance of Proteobacteria (Gammaproteobateria) and a decrease in Verrucomicrobiota (Chlamydiae and Verrucomicrobiae).The effects of extracellular enzyme activities and soil parameters on changes in microbial taxa were also significant following nitrogen addition. Structural equation modeling revealed that nutrient source and extracellular enzyme activities were positive predictors of microbial diversity. Our study highlights the effect of nitrogen addition on Antarctic soil microorganisms, supporting evidence of microbial resilience to nutrient increases. In contrast with studies suggesting that these communities may be resistant to change, Antarctic soil microbiota responded rapidly to augmented nutrient regimes.
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Affiliation(s)
- Girish R Nair
- Department of Microbiology, Faculty of Science, Stellenbosch University, Stellenbosch 7600, South Africa
- Centre for Epidemic Response and Innovation, School for Data Science and Computational Thinking, Stellenbosch University, Stellenbosch 7600, South Africa
| | - Bhaveni B Kooverjee
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Storme de Scally
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Don A Cowan
- Centre for Microbial Ecology and Genomics, Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Hatfield, Pretoria 0028, South Africa
| | - Thulani P Makhalanyane
- Department of Microbiology, Faculty of Science, Stellenbosch University, Stellenbosch 7600, South Africa
- Centre for Epidemic Response and Innovation, School for Data Science and Computational Thinking, Stellenbosch University, Stellenbosch 7600, South Africa
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3
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Wang X, Wang Z, Chen F, Zhang Z, Fang J, Xing L, Zeng J, Zhang Q, Liu H, Liu W, Ren C, Yang G, Zhong Z, Zhang W, Han X. Deterministic assembly of grassland soil microbial communities driven by climate warming amplifies soil carbon loss. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171418. [PMID: 38460701 DOI: 10.1016/j.scitotenv.2024.171418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 02/27/2024] [Accepted: 02/29/2024] [Indexed: 03/11/2024]
Abstract
Perturbations in soil microbial communities caused by climate warming are expected to have a strong impact on biodiversity and future climate-carbon (C) feedback, especially in vulnerable habitats that are highly sensitive to environmental change. Here, we investigate the impact of four-year experimental warming on soil microbes and C cycling in the Loess Hilly Region of China. The results showed that warming led to soil C loss, mainly from labile C, and this C loss is associated with microbial response. Warming significantly decreased soil bacterial diversity and altered its community structure, especially increasing the abundance of heat-tolerant microorganisms, but had no effect on fungi. Warming also significantly increased the relative importance of homogeneous selection and decreased "drift" of bacterial and fungal communities. Moreover, warming decreased bacterial network stability but increased fungal network stability. Notably, the magnitude of soil C loss was significantly and positively correlated with differences in bacterial community characteristics under ambient and warming conditions, including diversity, composition, network stability, and community assembly. This result suggests that microbial responses to warming may amplify soil C loss. Combined, these results provide insights into soil microbial responses and C feedback in vulnerable ecosystems under climate warming scenarios.
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Affiliation(s)
- Xing Wang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Zhengchen Wang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Fang Chen
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Zhenjiao Zhang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Jingbo Fang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Liheng Xing
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Jia Zeng
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Qi Zhang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Hanyu Liu
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Weichao Liu
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Chengjie Ren
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Gaihe Yang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China
| | - Zekun Zhong
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Wei Zhang
- College of Grassland Agriculture, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
| | - Xinhui Han
- College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, PR China.
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Xiang X, Yao T, Man B, Lin D, Li C. Global hotspots and trends in microbial-mediated grassland carbon cycling: a bibliometric analysis. Front Microbiol 2024; 15:1377338. [PMID: 38741733 PMCID: PMC11090204 DOI: 10.3389/fmicb.2024.1377338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 04/01/2024] [Indexed: 05/16/2024] Open
Abstract
Grasslands are among the most widespread environments on Earth, yet we still have poor knowledge of their microbial-mediated carbon cycling in the context of human activity and climate change. We conducted a systematic bibliometric analysis of 1,660 literature focusing on microbial-mediated grassland carbon cycling in the Scopus database from 1990 to 2022. We observed a steep increase in the number of multidisciplinary and interdisciplinary studies since the 2000s, with focus areas on the top 10 subject categories, especially in Agricultural and Biological Sciences. Additionally, the USA, Australia, Germany, the United Kingdom, China, and Austria exhibited high levels of productivity. We revealed that the eight papers have been pivotal in shaping future research in this field, and the main research topics concentrate on microbial respiration, interaction relationships, microbial biomass carbon, methane oxidation, and high-throughput sequencing. We further highlight that the new research hotspots in microbial-mediated grassland carbon cycling are mainly focused on the keywords "carbon use efficiency," "enzyme activity," "microbial community," and "high throughput sequencing." Our bibliometric analysis in the past three decades has provided insights into a multidisciplinary and evolving field of microbial-mediated grassland carbon cycling, not merely summarizing the literature but also critically identifying research hotspots and trends, the intellectual base, and interconnections within the existing body of collective knowledge and signposting the path for future research directions.
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Affiliation(s)
- Xing Xiang
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
- College of Life Science, Shangrao Normal University, Shangrao, China
- Key Laboratory for Regional Plants Conservation and Ecological Restoration of Northeast Jiangxi, College of Life Science, Shangrao Normal University, Shangrao, China
| | - Tuo Yao
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
- Key Laboratory of Grassland Ecosystem, Gansu Agricultural University, Ministry of Education, Lanzhou, China
| | - Baiying Man
- College of Life Science, Shangrao Normal University, Shangrao, China
- Key Laboratory for Regional Plants Conservation and Ecological Restoration of Northeast Jiangxi, College of Life Science, Shangrao Normal University, Shangrao, China
| | - Dong Lin
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
| | - Changning Li
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
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Elrys AS, Desoky ESM, Zhu Q, Liu L, Yun-Xing W, Wang C, Shuirong T, Yanzheng W, Meng L, Zhang J, Müller C. Climate controls on nitrate dynamics and gross nitrogen cycling response to nitrogen deposition in global forest soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 920:171006. [PMID: 38369137 DOI: 10.1016/j.scitotenv.2024.171006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 02/20/2024]
Abstract
Understanding the patterns and controls regulating nitrogen (N) transformation and its response to N enrichment is critical to re-evaluating soil N limitation or availability and its environmental consequences. Nevertheless, how climatic conditions affect nitrate dynamics and the response of gross N cycling rates to N enrichment in forest soils is still only rudimentarily known. Through collecting and analyzing 4426-single and 769-paired observations from 231 15N labeling studies, we found that nitrification capacity [the ratio of gross autotrophic nitrification (GAN) to gross N mineralization (GNM)] was significantly lower in tropical/subtropical (19%) than in temperate (68%) forest soils, mainly due to the higher GNM and lower GAN in tropical/subtropical regions resulting from low C/N ratio and high precipitation, respectively. However, nitrate retention capacity [the ratio of dissimilatory nitrate reduction to ammonium (DNRA) plus gross nitrate immobilization (INO3) to gross nitrification] was significantly higher in tropical/subtropical (86%) than in temperate (54%) forest soils, mainly due to the higher precipitation and GNM of tropical/subtropical regions, which stimulated DNRA and INO3. As a result, the ratio of GAN to ammonium immobilization (INH4) was significantly higher in temperate than in tropical/subtropical soils. Climatic rather than edaphic factors control heterotrophic nitrification rate (GHN) in forest soils. GHN significantly increased with increasing temperature in temperate regions and with decreasing precipitation in tropical/subtropical regions. In temperate forest soils, gross N transformation rates were insensitive to N enrichment. In tropical/subtropical forests, however, N enrichment significantly stimulated GNM, GAN and GAN to INH4 ratio, but inhibited INH4 and INO3 due to reduced microbial biomass and pH. We propose that temperate forest soils have higher nitrification capacity and lower nitrate retention capacity, implying a higher potential risk of N losses. However, tropical/subtropical forest systems shift from a conservative to a leaky N-cycling system in response to N enrichment.
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Affiliation(s)
- Ahmed S Elrys
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China; Soil Science Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt; Liebig Centre for Agroecology and Climate Impact Research, Justus Liebig University, Germany
| | - El-Sayed M Desoky
- Botany Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Qilin Zhu
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Lijun Liu
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Wan Yun-Xing
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Chengzhi Wang
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Tang Shuirong
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Wu Yanzheng
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Lei Meng
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China.
| | - Jinbo Zhang
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China; College of Tropical Crops, Hainan University, Haikou 570228, China; Liebig Centre for Agroecology and Climate Impact Research, Justus Liebig University, Germany; School of Geography, Nanjing Normal University, Nanjing 210023, China.
| | - Christoph Müller
- Liebig Centre for Agroecology and Climate Impact Research, Justus Liebig University, Germany; Institute of Plant Ecology, Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35392 Giessen, Germany; School of Biology and Environmental Science and Earth Institute, University College Dublin 4, Ireland
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6
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Zhou SYD, Lie Z, Liu X, Zhu YG, Peñuelas J, Neilson R, Su X, Liu Z, Chu G, Meng Z, Yan J, Liu J. Distinct patterns of soil bacterial and fungal community assemblages in subtropical forest ecosystems under warming. GLOBAL CHANGE BIOLOGY 2023; 29:1501-1513. [PMID: 36448266 DOI: 10.1111/gcb.16541] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/18/2022] [Indexed: 05/26/2023]
Abstract
Climate change globally affects soil microbial community assembly across ecosystems. However, little is known about the impact of warming on the structure of soil microbial communities or underlying mechanisms that shape microbial community composition in subtropical forest ecosystems. To address this gap, we utilized natural variation in temperature via an altitudinal gradient to simulate ecosystem warming. After 6 years, microbial co-occurrence network complexity increased with warming, and changes in their taxonomic composition were asynchronous, likely due to contrasting community assembly processes. We found that while stochastic processes were drivers of bacterial community composition, warming led to a shift from stochastic to deterministic drivers in dry season. Structural equation modelling highlighted that soil temperature and water content positively influenced soil microbial communities during dry season and negatively during wet season. These results facilitate our understanding of the response of soil microbial communities to climate warming and may improve predictions of ecosystem function of soil microbes in subtropical forests.
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Affiliation(s)
- Shu-Yi-Dan Zhou
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
| | - Zhiyang Lie
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Xujun Liu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Yong-Guan Zhu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
| | - Josep Peñuelas
- Global Ecology Unit CREAF-CSIC-UAB, CSIC, Barcelona, Spain
| | - Roy Neilson
- Ecological Sciences, The James Hutton Institute, Dundee, Scotland, UK
| | - Xiaoxuan Su
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, China
| | - Zhanfeng Liu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Guowei Chu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Ze Meng
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Junhua Yan
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Juxiu Liu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
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Li JT, Zhang Y, Chen H, Sun H, Tian W, Li J, Liu X, Zhou S, Fang C, Li B, Nie M. Low soil moisture suppresses the thermal compensatory response of microbial respiration. GLOBAL CHANGE BIOLOGY 2023; 29:874-889. [PMID: 36177515 DOI: 10.1111/gcb.16448] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
The thermal compensatory response of microbial respiration contributes to a decrease in warming-induced enhancement of soil respiration over time, which could weaken the positive feedback between the carbon cycle and climate warming. Climate warming is also predicted to cause a worldwide decrease in soil moisture, which has an effect on the microbial metabolism of soil carbon. However, whether and how changes in moisture affect the thermal compensatory response of microbial respiration are unexplored. Here, using soils from an 8-year warming experiment in an alpine grassland, we assayed the thermal response of microbial respiration rates at different soil moisture levels. The results showed that relatively low soil moisture suppressed the thermal compensatory response of microbial respiration, leading to an enhanced response to warming. A subsequent moisture incubation experiment involving off-plot soils also showed that the response of microbial respiration to 100 d warming shifted from a slight compensatory response to an enhanced response with decreasing incubation moisture. Further analysis revealed that such respiration regulation by moisture was associated with shifts in enzymatic activities and carbon use efficiency. Our findings suggest that future drought induced by climate warming might weaken the thermal compensatory capacity of microbial respiration, with important consequences for carbon-climate feedback.
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Affiliation(s)
- Jin-Tao Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Yan Zhang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Hongyang Chen
- Research Centre for Northeast Asia Carbon Sink, Centre for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Huiming Sun
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Weitao Tian
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Jinquan Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Xiang Liu
- State Key Laboratory of Grassland Agro-Ecosystem, Institute of Innovation Ecology, Lanzhou University, Lanzhou, China
| | - Shurong Zhou
- Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, College of Forestry, Hainan University, Haikou, China
| | - Changming Fang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Bo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
- Centre for Invasion Biology, Institute of Biodiversity, Yunnan University, Kunming, China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
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8
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Zhang Y, Li JT, Xu X, Chen HY, Zhu T, Xu JJ, Xu XN, Li JQ, Liang C, Li B, Fang CM, Nie M. Temperature fluctuation promotes the thermal adaptation of soil microbial respiration. Nat Ecol Evol 2023; 7:205-213. [PMID: 36635341 DOI: 10.1038/s41559-022-01944-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 10/25/2022] [Indexed: 01/14/2023]
Abstract
The magnitude of the feedback between soil microbial respiration and increased mean temperature may decrease (a process called thermal adaptation) or increase over time, and accurately representing this feedback in models improves predictions of soil carbon loss rates. However, climate change entails changes not only in mean temperature but also in temperature fluctuation, and how this fluctuation regulates the thermal response of microbial respiration has never been systematically evaluated. By analysing subtropical forest soils from a 2,000 km transect across China, we showed that although a positive relationship between soil microbial biomass-specific respiration and temperature was observed under increased constant incubation temperature, an increasing temperature fluctuation had a stronger negative effect. Our results further indicated that changes in bacterial community composition and reduced activities of carbon degradation enzymes promoted the effect of temperature fluctuation. This adaptive response of soil microbial respiration suggests that climate warming may have a lesser exacerbating effect on atmospheric CO2 concentrations than predicted.
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Affiliation(s)
- Yan Zhang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Jin-Tao Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Xiao Xu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, China
| | - Hong-Yang Chen
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
- Research Center for Northeast Asia Carbon Sink, Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Ting Zhu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Jian-Jun Xu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Xiao-Ni Xu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Jin-Quan Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Chao Liang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Bo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
- Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, China
| | - Chang-Ming Fang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China.
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9
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Chen H, Jing Q, Liu X, Zhou X, Fang C, Li B, Zhou S, Nie M. Microbial respiratory thermal adaptation is regulated by r-/K-strategy dominance. Ecol Lett 2022; 25:2489-2499. [PMID: 36134698 DOI: 10.1111/ele.14106] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 08/19/2022] [Accepted: 08/24/2022] [Indexed: 11/30/2022]
Abstract
Microbial thermal adaptation is considered to be one of the core mechanisms affecting soil carbon cycling. However, the role of microbial community composition in controlling thermal adaptation is poorly understood. Using microbial communities from the rhizosphere and bulk soils in an 8-year warming experiment as a model, we experimentally demonstrate that respiratory thermal adaptation was much stronger in microbial K-strategist-dominated bulk soils than in microbial r-strategist-dominated rhizosphere soils. Soil carbon availability exerted strong selection on the dominant ecological strategy of the microbial community, indirectly influencing respiratory thermal adaptation. Our findings shed light on the linchpin of the dominant ecological strategy exhibited by the microbial community in determining its respiratory thermal adaptation, with implications for understanding soil carbon losses under warming.
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Affiliation(s)
- Hongyang Chen
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China.,Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Qingfang Jing
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Xiang Liu
- State Key Laboratory of Grassland Agro-Ecosystem, College of Ecology, Lanzhou University, Lanzhou, China
| | - Xuhui Zhou
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Changming Fang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Bo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China.,Centre for Invasion Biology, Institute of Biodiversity, Yunnan University, Kunming, China
| | - Shurong Zhou
- Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants, Ministry of Education, College of Forestry, Hainan University, Haikou, China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
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10
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Guo X, Yuan M, Lei J, Shi Z, Zhou X, Li J, Deng Y, Yang Y, Wu L, Luo Y, Tiedje JM, Zhou J. Climate warming restructures seasonal dynamics of grassland soil microbial communities. MLIFE 2022; 1:245-256. [PMID: 38818216 PMCID: PMC10989843 DOI: 10.1002/mlf2.12035] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 06/07/2022] [Accepted: 07/09/2022] [Indexed: 06/01/2024]
Abstract
Soil microbial community's responses to climate warming alter the global carbon cycle. In temperate ecosystems, soil microbial communities function along seasonal cycles. However, little is known about how the responses of soil microbial communities to warming vary when the season changes. In this study, we investigated the seasonal dynamics of soil bacterial community under experimental warming in a temperate tall-grass prairie ecosystem. Our results showed that warming significantly (p = 0.001) shifted community structure, such that the differences of microbial communities between warming and control plots increased nonlinearly (R 2 = 0.578, p = 0.021) from spring to winter. Also, warming significantly (p < 0.050) increased microbial network complexity and robustness, especially during the colder seasons, despite large variations in network size and complexity in different seasons. In addition, the relative importance of stochastic processes in shaping the microbial community decreased by warming in fall and winter but not in spring and summer. Our study indicates that climate warming restructures the seasonal dynamics of soil microbial community in a temperate ecosystem. Such seasonality of microbial responses to warming may enlarge over time and could have significant impacts on the terrestrial carbon cycle.
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Affiliation(s)
- Xue Guo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of EnvironmentTsinghua UniversityBeijingChina
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
| | - Mengting Yuan
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCaliforniaUSA
| | - Jiesi Lei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of EnvironmentTsinghua UniversityBeijingChina
| | - Zhou Shi
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
- Gladstone Institutes and Chan‐Zuckerberg BiohubSan FranciscoCaliforniaUSA
| | - Xishu Zhou
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
- School of Minerals Processing and BioengineeringCentral South UniversityChangshaChina
| | - Jiabao Li
- Key Laboratory of Environmental and Applied Microbiology, Chinese Academy of Sciences and Environmental Microbiology, & Key Laboratory of Sichuan Province, Chengdu Institute of BiologyChinese Academy of SciencesChengduChina
| | - Ye Deng
- Key Laboratory of Environmental Biotechnology, Research Center for Eco‐Environmental SciencesChinese Academy of SciencesBeijingChina
| | - Yunfeng Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of EnvironmentTsinghua UniversityBeijingChina
| | - Liyou Wu
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
| | - Yiqi Luo
- Department of Biological Sciences, Center for Ecosystem Science and SocietyNorthern Arizona UniversityFlagstaffArizonaUSA
| | - James M. Tiedje
- Center for Microbial EcologyMichigan State UniversityEast LansingMichiganUSA
| | - Jizhong Zhou
- Institute for Environmental Genomics and Department of Microbiology and Plant BiologyUniversity of OklahomaNormanOklahomaUSA
- School of Civil Engineering and Environmental SciencesUniversity of OklahomaNormanOklahomaUSA
- Earth and Environmental SciencesLawrence Berkeley National LaboratoryBerkeleyCaliforniaUSA
- School of Computer SciencesUniversity of OklahomaNormanOklahomaUSA
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11
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Luo X, Yang Y, Xie S, Wang W, Li N, Wen C, Zhu S, Chen L. Drying and rewetting induce changes in biofilm characteristics and the subsequent release of metal ions. JOURNAL OF HAZARDOUS MATERIALS 2022; 433:128832. [PMID: 35390615 DOI: 10.1016/j.jhazmat.2022.128832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/15/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
Drying and rewetting can markedly influence the microbial structure and function of river biofilm communities and potentially result in the release of metal ions from biofilms containing metals. However, little information is available on the response of metal-enriched biofilms to drying and rewetting over time. In this study, natural biofilms were allowed to develop in four rotating annular bioreactors for 2-11 weeks, followed by drying for 5 days and rewetting for another 5 days. Subsequently, we assessed Zn, Cd, and As desorption from the biofilms and other related parameters (microbial community structure, biofilm morphology, enzyme activity, and surface components as well as characteristics). High-throughput sequencing of the 16 S rRNA gene and confocal laser scanning microscopy revealed that the biofilm architecture and bacterial communities were distinct in different growth phases and under drying and rewetting conditions (permutational multivariate analysis of variance; p = 0.001). Proteobacteria was the dominant bacterial phylum, accounting for 69.7-90.1% of the total content. Kinetic experiments revealed that the drying and rewetting process increased metal desorption from the biofilm matrix. The desorption of heavy metals was affected by the age of the biofilm, with the maximum amount of metal ions released from 2-week-old biofilms (one-way ANOVA, Zn: p < 0.001; Cd: p = 0.008; As: p < 0.001). The modifications in biofilm properties and decreased diversity of the bacterial community (paired t-test, p < 0.05) after drying and rewetting decreased the number of specific binding sites for metal ions. In addition, negatively charged arsenate and other anions in the liquid phase could compete with As ions for adsorption sites to promote the release of As(V) and/or reductive desorption of As(III). The results of this study and their interpretation are expected to help refine the behaviors of heavy metals in the aquatic environment.
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Affiliation(s)
- Xia Luo
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China.
| | - Yuanhao Yang
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Shanshan Xie
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Wenwen Wang
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Nihong Li
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Chen Wen
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Shijun Zhu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China
| | - Liqiang Chen
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China.
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12
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Distinct Elevational Patterns and Their Linkages of Soil Bacteria and Plant Community in An Alpine Meadow of the Qinghai-Tibetan Plateau. Microorganisms 2022; 10:microorganisms10051049. [PMID: 35630491 PMCID: PMC9143282 DOI: 10.3390/microorganisms10051049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/15/2022] [Accepted: 05/17/2022] [Indexed: 11/30/2022] Open
Abstract
Soil microbes play important roles in determining plant community composition and terrestrial ecosystem functions, as well as the direction and extent of terrestrial ecosystem feedback to environmental changes. Understanding the distribution patterns of plant and soil microbiota along elevation gradients is necessary to shed light on important ecosystem functions. In this study, soil bacteria along an elevation gradient in an alpine meadow ecosystem of the Qinghai−Tibetan Plateau were investigated using Illumina sequencing and GeoChip technologies. The community structure of the soil bacteria and plants presented a continuous trend along the elevation gradient, and their alpha diversity displayed different distribution patterns; however, there were no linkages between them. Beta diversity of the soil bacteria and plants was significantly influenced by elevational distance changes (p < 0.05). Functional gene categories involved in nitrogen and phosphorus cycling had faster changes than those involved in carbon degradation, and functional genes involved in labile carbon degradation also had faster variations than those involved in recalcitrant carbon degradation with elevational changes. According to Pearson’s correlation, partial Mantel test analysis, and canonical correspondence analysis, soil pH and mean annual precipitation were important environmental variables in influencing soil bacterial diversity. Soil bacterial diversity and plant diversity had different distribution patterns along the elevation gradient.
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13
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Soil Organic Carbon Mineralization and Its Temperature Sensitivity under Different Substrate Levels in the Mollisols of Northeast China. Life (Basel) 2022; 12:life12050712. [PMID: 35629379 PMCID: PMC9143832 DOI: 10.3390/life12050712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 12/20/2022] Open
Abstract
Soil organic carbon (SOC) mineralization plays an important role in global climate change. Temperature affects SOC mineralization, and its effect can be limited by the substrate available. However, knowledge of the effects of temperature and substrate quality on SOC mineralization in the Mollisols of Northeast China is still lacking. In this study, based on a spatial transplant experiment, we conducted a 73-day incubation to examine the effects of temperature on SOC mineralization and its temperature sensitivity under different carbon levels. We found that the SOC content, incubation temperature and their interaction had significant effects on SOC mineralization. A higher SOC content and higher incubation temperature resulted in higher SOC mineralization. The temperature sensitivity of SOC mineralization was affected by the substrate quality. The temperature sensitivity of SOC mineralization, showed a downward trend during the incubation period, and the range of variation in the Q10 declined with the increment in the SOC content. The study suggested that there was a higher SOC mineralization in high levels of substrate carbon when the temperature increased. Further, SOC mineralization under higher SOC contents was more sensitive to temperature changes. Our study provides vital information for SOC turnover and the CO2 sequestration capacity under global warming in the Mollisols of Northeast China and other black soil regions of the world.
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14
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Xu M, Zhu X, Chen S, Pang S, Liu W, Gao L, Yang W, Li T, Zhang Y, Luo C, He D, Wang Z, Fan Y, Han X, Zhang X. Distinctive pattern and mechanism of precipitation changes affecting soil microbial assemblages in the Eurasian steppe. iScience 2022; 25:103893. [PMID: 35243251 PMCID: PMC8866155 DOI: 10.1016/j.isci.2022.103893] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 01/09/2022] [Accepted: 02/04/2022] [Indexed: 11/19/2022] Open
Abstract
Precipitation may increase or decrease by different intensities, but the pattern and mechanism of soil microbial community assembly under various precipitation changes remain relatively underexplored. Here, although ±30% precipitation caused a small decrease (∼19%) in the within-treatment taxonomic compositional dissimilarity through the deterministic competitive exclusion process in a steppe ecosystem, ±60% precipitation caused a large increase (∼35%) in the dissimilarity through the stochastic ecological drift process (random birth/death), which was in contrast with the traditional thought that increasing the magnitude of environmental changes (e.g., from +30% to +60%) would elevate the importance of deterministic relative to stochastic processes. The increased taxonomic dissimilarity/stochasticity under ±60% precipitation translated into functional dissimilarity/stochasticity at the gene, protein, and enzyme levels. Overall, our results revealed the distinctive pattern and mechanism of precipitation changes affecting soil microbial community assembly and demonstrated the need to integrate microbial taxonomic information to better predict their functional responses to precipitation changes.
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Affiliation(s)
- Minjie Xu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Xunzhi Zhu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
| | - Shiping Chen
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Shuang Pang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wei Liu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lili Gao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wei Yang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Tingting Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yuhan Zhang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chun Luo
- Shanghai Majorbio Bio-pharm Biotechnology Co., Ltd, Shanghai 201318, China
| | - Dandan He
- Shanghai Majorbio Bio-pharm Biotechnology Co., Ltd, Shanghai 201318, China
| | - Zhiping Wang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Yi Fan
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xingguo Han
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Ximei Zhang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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15
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Wang H, Li J, Chen H, Liu H, Nie M. Enzymic moderations of bacterial and fungal communities on short- and long-term warming impacts on soil organic carbon. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 804:150197. [PMID: 34798739 DOI: 10.1016/j.scitotenv.2021.150197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/31/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Microbial communities play critical roles in soil carbon-warming feedback, but our understanding of their linkages to soil carbon (C) pools in response to short- and long-term warming is deficient. Here, by conducting a meta-analysis of 150 studies, we show that short-term (<5 years) warming mainly affects soil labile carbon (LC) pools by changing bacterial community structure, while long-term (≥5 years) warming promotes the decomposition of recalcitrant C (RC) pools by increasing fungal biomass and decreasing actinobacterial biomass. Specifically, under short-term warming, significant increases in actinobacterial biomass (+15.9%) and the G+/G- ratio (+8.0%) were accompanied by an increase in carbon-degrading enzyme activities and a decrease in LC (-5.9%). Under long-term warming, the fungal biomass (+20.4%) and related POX (phenol oxidase) activity (+34.9%) increased significantly, while actinobacterial biomass (-20.1%), RC (-18.8%) and SOC (-6.7%) decreased. Meanwhile, we observed that warming impacts on soil microbial communities can be predicted by ecosystem type, the magnitude of warming, pH and elevation. Latitude and warming duration contributed the most to explaining the responses of LC and RC, respectively, across studies. Given that RC accounts for a substantial fraction of global soil C pools, the decline in RC pools greatly contributes to soil C degradation. Our findings suggest that different microbial groups may mediate the temporal dynamics of the decomposition of different soil C components and highlight that incorporating the temporal responses of soil microorganisms will improve predictions of the long-term dynamics of soil C pools in a warmer world.
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Affiliation(s)
- Hui Wang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Jinquan Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Hongyang Chen
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Hao Liu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China.
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16
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Al-Atrash MK, Khadur ZK, Khadim AA. Soil yeast abundance and diversity assessment in a hot climatic region, semi-arid ecosystem. IRANIAN JOURNAL OF MICROBIOLOGY 2021; 13:418-424. [PMID: 34540181 PMCID: PMC8416586 DOI: 10.18502/ijm.v13i3.6406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Background and Objectives Yeasts are an important portion of microbial communities of soil due to their bioactivity for ecosystem safety. Soil yeast abundance and diversity are likely to be affected under harsh environmental and climatic conditions. In Iraq, human activity and climatic changes especially high temperature which may alter microbial communities in soil. Very little is known about yeast abundance and diversity in a hot climatic region. Materials and Methods By PCR technique, soil yeast abundance and diversity were investigated under extreme environmental and climatic conditions, as well as the effects of soil properties and vegetation cover in semi-arid lands. Results In all, 126 yeast strains were isolated and identified as belonging to 13 genera and 26 known species. The maximum quantity of yeast was 0.8 × 102 CFU g-1 of soil, with significantly varied in abundance and diversity depending on soil properties and presence of vegetation. Conclusion The results show that soil yeast abundance in these regions was significantly decreased. However, semi-arid lands are still rich in yeast diversity, and many species have adapted to survive in such conditions.
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Affiliation(s)
| | - Zwida K Khadur
- Department of Nursing, Baquba Technical Institute, Middle Technical University, Baghdad, Iraq
| | - Anwar A Khadim
- Department of Nursing, Baquba Technical Institute, Middle Technical University, Baghdad, Iraq
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17
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Liu J, Han G. Controlling factors of seasonal and spatial variation of riverine CO 2 partial pressure and its implication for riverine carbon flux. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 786:147332. [PMID: 33971594 DOI: 10.1016/j.scitotenv.2021.147332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/22/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Global carbon cycle is closely related to the earth's energy budget, because CO2 plays an active role in the global climate change. The higher CO2 partial pressure (pCO2) in inland water in comparison with atmosphere, causing a CO2 evasion from water to the air. However, the relationship between CO2 evasion, riverine carbon export, and hydrochemistry in watershed has remained largely unknown. This study collected 84 river water samples in Jiulongjiang River, to further address this subject on a small watershed scale. Water temperature fluctuation, riverine photosynthesis, and acidic matter input could not account for the seasonal variation of pCO2 in Jiulongjiang River. The spatial shifts of pCO2 were derived from the mixing process between headwater and soil influx. The soil influx with high pCO2 compensated the CO2 lost from evasion and caused pCO2 in Jiulongjiang River higher than the atmospheric level. The seasonal variation of pCO2 was caused by the precipitation difference between the wet season and dry season. The addition of rainwater significantly decreased the riverine pCO2 and HCO3- concentration in the wet season. The CO2 evasion rate in Jiulongjiang River was clearly higher than that in most worldwide large rivers. The annual CO2 evasion flux in Jiulongjiang River Basin was estimated about 2.48 × 105 T C/year, which was higher than the riverine total carbon export. The CO2 evasion rate exhibited significantly positive relationship with water surface area, indicating that the global CO2 evasion flux may be roughly estimated based on the observed regression relationship. Overall, our study indicated that it still requires collaborative effects to investigate the carbon dynamics in river water, more estimations of CO2 outgassing flux from river water under different hydrologic and geologic conditions are necessary.
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Affiliation(s)
- Jinke Liu
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China
| | - Guilin Han
- Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China.
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18
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Pal A, Bhattacharjee S, Saha J, Sarkar M, Mandal P. Bacterial survival strategies and responses under heavy metal stress: a comprehensive overview. Crit Rev Microbiol 2021; 48:327-355. [PMID: 34473592 DOI: 10.1080/1040841x.2021.1970512] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Heavy metals bring long-term hazardous consequences and pose a serious threat to all life forms. Being non-biodegradable, they can remain in the food webs for a long period of time. Metal ions are essential for life and indispensable for almost all aspects of metabolism but can be toxic beyond threshold level to all living beings including microbes. Heavy metals are generally present in the environment, but many geogenic and anthropogenic activities has led to excess metal ion accumulation in the environment. To survive in harsh metal contaminated environments, bacteria have certain resistance mechanisms to metabolize and transform heavy metals into less hazardous forms. This also gives rise to different species of heavy metal resistant bacteria. Herein, we have tried to incorporate the different aspects of heavy metal toxicity in bacteria and provide an up-to-date and across-the-board review. The various aspects of heavy metal biology of bacteria encompassed in this review includes the biological notion of heavy metals, toxic effect of heavy metals on bacteria, the factors regulating bacterial heavy metal resistance, the diverse mechanisms governing bacterial heavy metal resistance, bacterial responses to heavy metal stress, and a brief overview of gene regulation under heavy metal stress.
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Affiliation(s)
- Ayon Pal
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Sukanya Bhattacharjee
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Jayanti Saha
- Microbiology and Computational Biology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Monalisha Sarkar
- Mycology and Plant Pathology Laboratory, Department of Botany, Raiganj University, Raiganj, India
| | - Parimal Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Raiganj University, Raiganj, India
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19
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Tong D, Li Z, Xiao H, Nie X, Liu C, Zhou M. How do soil microbes exert impact on soil respiration and its temperature sensitivity? Environ Microbiol 2021; 23:3048-3058. [PMID: 33891359 DOI: 10.1111/1462-2920.15520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 03/16/2021] [Accepted: 04/08/2021] [Indexed: 11/29/2022]
Abstract
Understanding how soil microorganisms influence the direction and magnitude of soil carbon feedback to global warming is vital to predict future climate change. Although microbial activities are major contributors to soil respiration (RS ) and its temperature sensitivity (Q10 ), the mechanisms underpinning microbial influence on RS and Q10 remain unclear. Coupling variation partitioning analysis (VPA), correlation analysis and multiple stepwise linear regression analysis, we illustrate that bacteria mainly affect RS and its temperature sensitivity (Q10 ) by shifting bacterial community composition (denoted by principal coordinates analysis). We also found that soil water content (SWC) and available nutrient (AN) were the factor key to changing bacterial community composition (P < 0.05). Co-occurrence network demonstrated that Mod 0 ecological cluster composed of copiotrophic taxa groups was significantly associated with RS and Q10 (P < 0.01, R > 0.5), including Proteobacteria, Actinobacteria, and Bacteroidetes. Illuminating the mechanisms underpinning the influence of soil microbes on RS and Q10 values is fundamental to understanding mechanistic soil-climate carbon cycles.
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Affiliation(s)
- Di Tong
- College of Resources and Environmental Sciences, Hunan Normal University, Changsha, Hunan, 410081, China.,College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China
| | - Zhongwu Li
- College of Resources and Environmental Sciences, Hunan Normal University, Changsha, Hunan, 410081, China.,College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China
| | - Haibing Xiao
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiaodong Nie
- College of Resources and Environmental Sciences, Hunan Normal University, Changsha, Hunan, 410081, China
| | - Chun Liu
- Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Mi Zhou
- College of Resources and Environmental Sciences, Hunan Normal University, Changsha, Hunan, 410081, China
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20
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Yang F, Chen Q, Zhang Q, Long C, Jia W, Cheng X. Keystone species affect the relationship between soil microbial diversity and ecosystem function under land use change in subtropical China. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13769] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fan Yang
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental Science Yunnan University Kunming China
| | - Qiong Chen
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental Science Yunnan University Kunming China
| | - Qian Zhang
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental Science Yunnan University Kunming China
| | - Chunyan Long
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental Science Yunnan University Kunming China
| | - Wei Jia
- Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden Chinese Academy of Sciences (CAS) Wuhan P. R. China
- Graduate University of Chinese Academy of Sciences Beijing China
| | - Xiaoli Cheng
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province School of Ecology and Environmental Science Yunnan University Kunming China
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21
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Li J, Pei J, Pendall E, Reich PB, Noh NJ, Li B, Fang C, Nie M. Rising Temperature May Trigger Deep Soil Carbon Loss Across Forest Ecosystems. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001242. [PMID: 33042745 PMCID: PMC7539220 DOI: 10.1002/advs.202001242] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/29/2020] [Indexed: 06/01/2023]
Abstract
Significantly more carbon (C) is stored in deep soil than in shallow horizons, yet how the decomposition of deep soil organic C (SOC) will respond to rising temperature remains unexplored on large scales, leading to considerable uncertainties to predictions of the magnitude and direction of C-cycle feedbacks to climate change. Herein, short-term temperature sensitivity of SOC decomposition (expressed as Q 10) from six depths within the top 1 m soil from 90 upland forest sites (540 soil samples) across China is reported. Results show that Q 10 significantly increases with soil depth, suggesting that deep SOC is more vulnerable to loss with rising temperature in comparison to shallow SOC. Climate is the primary regulator of shallow soil Q 10 but its relative influence declines with depth; in contrast, soil C quality has a minor influence on Q 10 in shallow soil but increases its influence with depth. When considering the depth-dependent Q 10 variations, results further show that using the thermal response of shallow soil layer for the whole soil profile, as is usually done in model predictions, would significantly underestimate soil C-climate feedbacks. The results highlight that Earth system models need to consider multilayer soil C dynamics and their controls to improve prediction accuracy.
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Affiliation(s)
- Jinquan Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringCoastal Ecosystems Research Station of the Yangtze River EstuarySchool of Life SciencesFudan UniversityShanghai200438P. R. China
| | - Junmin Pei
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringCoastal Ecosystems Research Station of the Yangtze River EstuarySchool of Life SciencesFudan UniversityShanghai200438P. R. China
| | - Elise Pendall
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSW2751Australia
| | - Peter B. Reich
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSW2751Australia
- Department of Forest ResourcesUniversity of MinnesotaSt. PaulMN55108USA
| | - Nam Jin Noh
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSW2751Australia
- Forest Technology and Management Research CenterNational Institute of Forest SciencePocheon11186Republic of Korea
| | - Bo Li
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringCoastal Ecosystems Research Station of the Yangtze River EstuarySchool of Life SciencesFudan UniversityShanghai200438P. R. China
| | - Changming Fang
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringCoastal Ecosystems Research Station of the Yangtze River EstuarySchool of Life SciencesFudan UniversityShanghai200438P. R. China
| | - Ming Nie
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringCoastal Ecosystems Research Station of the Yangtze River EstuarySchool of Life SciencesFudan UniversityShanghai200438P. R. China
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22
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Hu R, Wang XP, Xu JS, Zhang YF, Pan YX, Su X. The mechanism of soil nitrogen transformation under different biocrusts to warming and reduced precipitation: From microbial functional genes to enzyme activity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 722:137849. [PMID: 32179300 DOI: 10.1016/j.scitotenv.2020.137849] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 03/05/2020] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
Soil nitrogen (N) mineralization is a microbially-mediated biogeochemical process that is strongly influenced by changing climates. However, little information is available on the mechanisms behind the response of N mineralization to prolonged warming coupled with drought in soils covered by biocrusts. We used open top chambers to investigate the rate of soil N transformation (ammonification, nitrification and mineralization), enzyme activity and gene abundance in response to warming coupled with reduced precipitation over three years (2016-2018). Warming and drought significantly reduced the N transformation rate, extracellular enzyme activity, and gene abundance in moss-covered soil. For cyanobacteria-covered soil, however, it inhibited enzyme activity and increased the abundance of the nitrification-related genes and therefore nitrification rate. Our treatments had no obvious effects on N transformation and enzyme activity, but reduced gene abundance in bare soil. Biocrusts may facilitate N transformation while the degradation of moss crust caused by climate warming will dampen any regulating effect of biocrusts on the belowground microbial community. Furthermore, belowground microbial communities can mediate N transformation under ongoing warming and reduced precipitation by suppressing ammonification- and nitrification-related gene families, and by stimulating nitrification-related gene families involved in cyanobacteria-covered soil. This study provides a basis for identifying the functional genes involved in key processes in the N cycle in temperate desert ecosystems, and our results further highlight the importance of different biocrusts organisms in the N cycle in temperate deserts as Earth becomes hotter and drier.
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Affiliation(s)
- Rui Hu
- Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.
| | - Xin-Ping Wang
- Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | | | - Ya-Feng Zhang
- Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Yan-Xia Pan
- Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Xue Su
- Northwest normal university, China
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23
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Li J, Yang C, Zhou H, Shao X. Responses of plant diversity and soil microorganism diversity to water and nitrogen additions in the Qinghai-Tibetan Plateau. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2020.e01003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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24
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Shi Y, Zhang K, Li Q, Liu X, He JS, Chu H. Interannual climate variability and altered precipitation influence the soil microbial community structure in a Tibetan Plateau grassland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 714:136794. [PMID: 31991278 DOI: 10.1016/j.scitotenv.2020.136794] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/14/2020] [Accepted: 01/17/2020] [Indexed: 06/10/2023]
Abstract
Climate change could influence aboveground and belowground plant community diversity and structure profoundly. However, our understanding of the responses of microbial communities to changes in both temperature and precipitation remains poor. Here, using 16S rDNA and ITS high throughput sequencing, we investigated the responses of soil bacterial and fungal community structure to both temperature and precipitation changes, and how such changes could influence interannual variability within soil microbial communities in a grassland in the Tibetan Plateau. The altered precipitation treatments had significant effects on soil bacterial and fungal community structure (F = 2.11, P = 0,001; F = 2.26. P = 0.001, respectively), while year had a more significant effect on soil bacterial and fungal community structure (F = 3.36, P = 0.001; F = 2.67, P = 0.001, respectively). The results showed that the interannual fluctuations in mean annual precipitation and mean annual temperature were significantly correlated with the interannual variations in soil bacterial and fungal community structures. In addition, the robustness of co-occurrence relationships among microbes could be strongly influenced by the altered precipitation and year. Overall, our results indicated that the effect of interannual climate variability on the soil microbial community was greater than the effect of a 1.6 °C increase in temperature. Our findings suggest an interactive effect of rapid interannual variability and slow climate change on the belowground soil microbial community structure.
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Affiliation(s)
- Yu Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Kaoping Zhang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Qian Li
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
| | - Xu Liu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Jin-Sheng He
- Department of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China; Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
| | - Haiyan Chu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.
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25
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Hu Z, Chen X, Yao J, Zhu C, Zhu J, Liu M. Plant-mediated effects of elevated CO 2 and rice cultivars on soil carbon dynamics in a paddy soil. THE NEW PHYTOLOGIST 2020; 225:2368-2379. [PMID: 31667850 DOI: 10.1111/nph.16298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Soil organic carbon (SOC) sequestration under elevated CO2 concentration (eCO2 ) is a function of carbon (C) input and C retention. Nitrogen (N) limitation in natural ecosystems can constrain plant responses to eCO2 and their subsequent effects on SOC, but the effect of eCO2 on SOC in N-enriched agroecosystems with cultivars highly responsive to eCO2 is largely unknown. We reported results of SOC dynamics from a field free-air CO2 enrichment experiment with two rice cultivars having distinct photosynthetic capacities under eCO2 . A reciprocal incubation experiment was further conducted to disentangle the effect of changes in litter quality and soil microbial community on litter-derived C dynamics. eCO2 significantly increased total SOC content, dissolved organic C and particulate organic C under the strongly responsive cultivar, likely due to enhanced organic C inputs originated from CO2 stimulation of shoot and root biomass. Increases in the residue C : N ratio and fungal abundance induced by eCO2 under the strongly responsive cultivar reduced C losses from decomposition, possibly through increasing microbial C use efficiency. Our findings suggest that applications of high-yielding cultivars may substantially enhance soil C sequestration in rice paddies under future CO2 scenarios.
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Affiliation(s)
- Zhengkun Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Key Laboratory for Solid Organic Waste Resource Utilization, Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, China
| | - Xiaoyun Chen
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Key Laboratory for Solid Organic Waste Resource Utilization, Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, China
| | - Junneng Yao
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Key Laboratory for Solid Organic Waste Resource Utilization, Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, China
| | - Chunwu Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Jianguo Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Manqiang Liu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Key Laboratory for Solid Organic Waste Resource Utilization, Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210014, China
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26
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Wang Y, Ma A, Liu G, Ma J, Wei J, Zhou H, Brandt KK, Zhuang G. Potential feedback mediated by soil microbiome response to warming in a glacier forefield. GLOBAL CHANGE BIOLOGY 2020; 26:697-708. [PMID: 31782204 DOI: 10.1111/gcb.14936] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/04/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Mountain glaciers are retreating at an unprecedented rate due to global warming. Glacier retreat is widely believed to be driven by the physiochemical characteristics of glacier surfaces; however, the current knowledge of such biological drivers remains limited. An estimated 130 Tg of organic carbon (OC) is stored in mountain glaciers globally. As a result of global warming, the accelerated microbial decomposition of OC may further accelerate the melting process of mountain glaciers by heat production with the release of greenhouse gases, such as carbon dioxide (CO2 ) and methane. Here, using short-term aerobic incubation data from the forefield of Urumqi Glacier No. 1, we assessed the potential climate feedback mediated by soil microbiomes at temperatures of 5°C (control), 6.2°C (RCP 2.6), 11°C (RCP 8.5), and 15°C (extreme temperature). We observed enhanced CO2 -C release and heat production under warming conditions, which led to an increase in near-surface (2 m) atmospheric temperatures, ranging from 0.9°C to 3.4°C. Warming significantly changed the structures of the RNA-derived (active) and DNA-derived (total) soil microbiomes, and active microbes were more sensitive to increased temperatures than total microbes. Considering the positive effects of temperature and deglaciation age on the CO2 -C release rate, the alterations in the active microbial community structure had a negative impact on the increased CO2 -C release rate. Our results revealed that glacial melting could potentially be significantly accelerated by heat production from increased microbial decomposition of OC. This risk might be true for other high-altitude glaciers under emerging warming, thus improving the predictions of the effects of potential feedback on global warming.
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Affiliation(s)
- Yuwan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
- Sino-Danish College of University of Chinese Academy of Sciences, Beijing, China
- Sino-Danish Center for Education and Research, Beijing, China
| | - Anzhou Ma
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Guohua Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jianpeng Ma
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jing Wei
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Hanchang Zhou
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Kristian Koefoed Brandt
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
- Sino-Danish Center for Education and Research, Beijing, China
| | - Guoqiang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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27
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Li Y, Lv W, Jiang L, Zhang L, Wang S, Wang Q, Xue K, Li B, Liu P, Hong H, Renzen W, Wang A, Luo C, Zhang Z, Dorji T, Taş N, Wang Z, Zhou H, Wang Y. Microbial community responses reduce soil carbon loss in Tibetan alpine grasslands under short-term warming. GLOBAL CHANGE BIOLOGY 2019; 25:3438-3449. [PMID: 31373124 DOI: 10.1111/gcb.14734] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 06/10/2023]
Abstract
Changes in labile carbon (LC) pools and microbial communities are the primary factors controlling soil heterotrophic respiration (Rh ) in warming experiments. Warming is expected to initially increase Rh but studies show this increase may not be continuous or sustained. Specifically, LC and soil microbiome have been shown to contribute to the effect of extended warming on Rh . However, their relative contribution is unclear and this gap in knowledge causes considerable uncertainty in the prediction of carbon cycle feedbacks to climate change. In this study, we used a two-step incubation approach to reveal the relative contribution of LC limitation and soil microbial community responses in attenuating the effect that extended warming has on Rh . Soil samples from three Tibetan ecosystems-an alpine meadow (AM), alpine steppe (AS), and desert steppe (DS)-were exposed to a temperature gradient of 5-25°C. After an initial incubation period, soils were processed in one of two methods: (a) soils were sterilized then inoculated with parent soil microbes to assess the LC limitation effects, while controlling for microbial community responses; or (b) soil microbes from the incubations were used to inoculate sterilized parent soils to assess the microbial community effects, while controlling for LC limitation. We found both LC limitation and microbial community responses led to significant declines in Rh by 37% and 30%, respectively, but their relative contributions were ecosystem specific. LC limitation alone caused a greater Rh decrease for DS soils than AMs or ASs. Our study demonstrates that soil carbon loss due to Rh in Tibetan alpine soils-especially in copiotrophic soils-will be weakened by microbial community responses under short-term warming.
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Affiliation(s)
- Yaoming Li
- College of Grassland Science, Beijing Forestry University, Beijing, China
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Wangwang Lv
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lili Jiang
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Lirong Zhang
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Shiping Wang
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
| | - Qi Wang
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Kai Xue
- University of Chinese Academy of Sciences, Beijing, China
| | - Bowen Li
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Peipei Liu
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Huan Hong
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wangmu Renzen
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - A Wang
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Caiyun Luo
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Provincial Key Laboratory of Restoration Ecology of Cold Area, Xining, China
| | - Zhenhua Zhang
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Provincial Key Laboratory of Restoration Ecology of Cold Area, Xining, China
| | - Tsechoe Dorji
- Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
| | - Neslihan Taş
- Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Biosciences Area, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Zhezhen Wang
- The University of Chicago Medicine and Biological Sciences Division, Chicago, IL, USA
| | - Huakun Zhou
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- Qinghai Provincial Key Laboratory of Restoration Ecology of Cold Area, Xining, China
| | - Yanfen Wang
- University of Chinese Academy of Sciences, Beijing, China
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28
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Ghimire R, Bista P, Machado S. Long-term Management Effects and Temperature Sensitivity of Soil Organic Carbon in Grassland and Agricultural Soils. Sci Rep 2019; 9:12151. [PMID: 31434925 PMCID: PMC6704134 DOI: 10.1038/s41598-019-48237-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 07/31/2019] [Indexed: 11/21/2022] Open
Abstract
Soil organic carbon (SOC) is integral to soil health and agroecosystem resilience. Despite much research, understanding of temperature sensitivity of SOC under long-term agricultural management is very limited. The main objective of this study was to evaluate SOC and nitrogen (N) dynamics under grasslands and winter wheat (Triticum aestivum L)-based crop rotations in the inland Pacific Northwest (IPNW), USA, and measure SOC mineralization under ambient and elevated incubation temperatures. Soil samples were collected from 0–10 and 10–20 cm depths from an undisturbed grassland (GP), winter wheat-pea (Pisum sativum L) rotations under conventional tillage (WP-CT) and no-tillage (WP-NT), and winter wheat-fallow rotation under conventional tillage (WF-CT) and analyzed for SOC and N pools. Soil samples were incubated at 20 °C and 30 °C for 10 weeks, and SOC mineralization rates were estimated using the first order kinetic model. The GP had the greatest amounts of SOC, total N (TN), and microbial biomass carbon (MBC) and WP rotations had higher inorganic N content than other treatments. The SOC mineralization at elevated incubation temperature was 72–177% more than at the ambient temperature, and the greatest effect was observed in GP. The SOC storage under a given management did not have consistent effects on soil carbon (C) and N mineralization under elevated temperature. However, soil disturbance under WP-CT and WF-CT accelerated SOC mineralization leading to soil C loss. Reducing tillage, integrating legumes into crop rotations, and growing perennial grasses could minimize SOC loss and have the potential to improve soil health and agroecosystem resilience under projected climate warming.
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Affiliation(s)
- Rajan Ghimire
- New Mexico State University, Agricultural Science Center, Clovis, NM, USA.
| | - Prakriti Bista
- Oregon State University, Columbia Basin Agricultural Research Center, Pendleton, OR, USA
| | - Stephen Machado
- Oregon State University, Columbia Basin Agricultural Research Center, Pendleton, OR, USA
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29
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Nguyen LTT, Broughton K, Osanai Y, Anderson IC, Bange MP, Tissue DT, Singh BK. Effects of elevated temperature and elevated CO 2 on soil nitrification and ammonia-oxidizing microbial communities in field-grown crop. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 675:81-89. [PMID: 31026646 DOI: 10.1016/j.scitotenv.2019.04.181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
Rising global air temperature and atmospheric CO2 are expected to have considerable effects on soil nutrient cycling and plant productivity. Soil nitrification controlled by ammonia-oxidizing bacteria and archaea (AOB and AOA) communities plays a key role in contributing to plant nitrogen (N) availability; however, response of soil nitrification and functional microbial communities to climate change and subsequent consequences for crop yields remain largely unknown. Cotton productivity is a function of temperature and N availability under well-watered conditions. In general, cotton growth responds positively to elevated CO2, but simultaneous warming may offset benefits of rising CO2. In this study, cotton was used as a model system to elucidate the short-term response of soil nitrification and ammonia-oxidizing communities to elevated temperature and elevated CO2 using field-based environmentally-controlled chambers. Elevated temperature (ambient + 1.1 °C) altered the AOA community, while elevated temperature and elevated CO2 (ambient + 132 ppm) significantly increased soil nitrification rate and shifted AOB and AOA communities, but these effects depended on cotton developmental stages. Ammonia-oxidizing community abundance and structure were statistically correlated with nitrifying activity. Our findings suggest that climate change will positively affect soil nitrifying communities, leading to an increase in process rates and subsequent N availability, which is directly linked to crop productivity.
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Affiliation(s)
- Linh T T Nguyen
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Katie Broughton
- CSIRO Agriculture and Food, Australian Cotton Research Institute, Locked Bag 59, Narrabri, NSW 2390, Australia
| | - Yui Osanai
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Ian C Anderson
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Michael P Bange
- CSIRO Agriculture and Food, Australian Cotton Research Institute, Locked Bag 59, Narrabri, NSW 2390, Australia
| | - David T Tissue
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Brajesh K Singh
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; Global Centre for Land-Based Innovation, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.
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30
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Yang W, Xia L, Zhu Z, Jiang L, Cheng X, An S. Shift in soil organic carbon and nitrogen pools in different reclaimed lands following intensive coastal reclamation on the coasts of eastern China. Sci Rep 2019; 9:5921. [PMID: 30976079 PMCID: PMC6459922 DOI: 10.1038/s41598-019-42048-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/21/2019] [Indexed: 11/25/2022] Open
Abstract
The impacts of coastal reclamation on carbon (C) and nitrogen (N) sinks of coastal wetlands remain unclearly understood. This study was conducted to investigate the alterations of soil organic C and N (SOC and SON) pools following conversion of Phragmites australis salt marsh into fishpond, wheat and rapeseed fields and town construction land through reclamation along Jiangsu coast in eastern China. Coastal reclamation significantly increased stocks of soil total, labile and recalcitrant organic C and N (SLOC, SLON, SROC, and SRON), and concentrations of water-soluble organic C (WSOC), microbial biomass C and N (SMBC and SMBN), cumulative CO2-C mineralization (MINC) following conversion of P. australis salt marsh into fishpond, wheat and rapeseed fields. However, coastal reclamation reduced SOC, SLOC, SROC, SRON, WSOC, SMBC, SMBN, and MINC following conversion of P. australis salt marsh into town construction land. Our results suggest that coastal reclamation affects C and N sinks of coastal wetlands by changing SOC and SON pools size, stability and dynamics changes following conversion of P. australis salt marsh into other land use types. This finding were primarily attributed to alterations in quantity and quality of exogenous materials returning the soil, and soil physiochemical properties as affected by coastal reclamation.
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Affiliation(s)
- Wen Yang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, P. R. China. .,School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing, 210023, P. R. China. .,Center for Ecosystem Science and Society (Ecoss), Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA.
| | - Lu Xia
- School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing, 210023, P. R. China
| | - Zhihong Zhu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Lifen Jiang
- Center for Ecosystem Science and Society (Ecoss), Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - Xiaoli Cheng
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, P. R. China.
| | - Shuqing An
- School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing, 210023, P. R. China
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31
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Wang Q, Zhao X, Chen L, Yang Q, Chen S, Zhang W. Global synthesis of temperature sensitivity of soil organic carbon decomposition: Latitudinal patterns and mechanisms. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13256] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qingkui Wang
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- Huitong Experimental Station of Forest Ecology Chinese Academy of Sciences Huitong China
| | - Xuechao Zhao
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- University of Chinese Academy of Sciences Beijing China
| | - Longchi Chen
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- Huitong Experimental Station of Forest Ecology Chinese Academy of Sciences Huitong China
| | - Qingpeng Yang
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- Huitong Experimental Station of Forest Ecology Chinese Academy of Sciences Huitong China
| | - Shi Chen
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- University of Chinese Academy of Sciences Beijing China
| | - Weidong Zhang
- CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Shenyang China
- Huitong Experimental Station of Forest Ecology Chinese Academy of Sciences Huitong China
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32
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Dacal M, Bradford MA, Plaza C, Maestre FT, García-Palacios P. Soil microbial respiration adapts to ambient temperature in global drylands. Nat Ecol Evol 2019; 3:232-238. [PMID: 30643242 PMCID: PMC6420078 DOI: 10.1038/s41559-018-0770-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 11/26/2018] [Indexed: 12/03/2022]
Abstract
Heterotrophic soil microbial respiration – one of the main processes of carbon loss from soils to the atmosphere – is sensitive to temperature in the short-term. However, how this sensitivity is affected by long-term thermal regimes is uncertain. There is an expectation that soil microbial respiration rates adapt to the ambient thermal regime, but whether this adaptation magnifies or reduces respiration sensitivities to temperature fluctuations remains unresolved. This gap in our understanding is particularly pronounced for drylands as most studies conducted so far have focused on mesic systems. Here, we conducted an incubation study using soils from 110 global drylands encompassing a wide gradient in mean annual temperature. We tested how mean annual temperature affects soil respiration rates at three assay temperatures while controlling for substrate depletion and microbial biomass. Estimated soil respiration rates at the mean microbial biomass were lower in sites with higher mean annual temperatures across the three assayed temperatures. The patterns observed are consistent with expected evolutionary trade-offs in the structure and function of enzymes under different thermal regimes. Our results therefore suggest that soil microbial respiration adapts to the ambient thermal regime in global drylands.
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Affiliation(s)
- Marina Dacal
- Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, Madrid, Spain.
| | - Mark A Bradford
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, USA
| | - César Plaza
- Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, Madrid, Spain.,Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Fernando T Maestre
- Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, Madrid, Spain
| | - Pablo García-Palacios
- Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, Madrid, Spain
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33
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Song J, Wan S, Piao S, Hui D, Hovenden MJ, Ciais P, Liu Y, Liu Y, Zhong M, Zheng M, Ma G, Zhou Z, Ru J. Elevated CO2
does not stimulate carbon sink in a semi-arid grassland. Ecol Lett 2019; 22:458-468. [DOI: 10.1111/ele.13202] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/17/2018] [Accepted: 10/23/2018] [Indexed: 01/19/2023]
Affiliation(s)
- Jian Song
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
- College of Life Sciences; Hebei University; Baoding Hebei 071002 China
| | - Shiqiang Wan
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
- College of Life Sciences; Hebei University; Baoding Hebei 071002 China
| | - Shilong Piao
- Sino-French Institute for Earth System Science; College of Urban and Environmental Sciences; Peking University; Beijing 100871 China
- Key Laboratory of Alpine Ecology and Biodiversity; Institute of Tibetan Plateau Research; Chinese Academy of Sciences; Beijing 100085 China
- Centre for Excellence in Tibetan Earth Science; Chinese Academy of Sciences; Beijing 100085 China
| | - Dafeng Hui
- Department of Biological Sciences; Tennessee State University; Nashville TN 37209 USA
| | - Mark J. Hovenden
- Biological Sciences; School of Natural Sciences; University of Tasmania; Private Bag 55 Hobart Tas 7001 Australia
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l'Environnement; CEA CNRS UVSQ; Gif-sur-Yvette France
| | - Yongwen Liu
- Key Laboratory of Alpine Ecology and Biodiversity; Institute of Tibetan Plateau Research; Chinese Academy of Sciences; Beijing 100101 China
| | - Yinzhan Liu
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
| | - Mingxing Zhong
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
| | - Mengmei Zheng
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
| | - Gaigai Ma
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
| | - Zhenxing Zhou
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
| | - Jingyi Ru
- International Joint Research Laboratory for Global Change Ecology; School of Life Sciences; Henan University; Kaifeng Henan 475004 China
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34
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Chen J, Luo Y, García-Palacios P, Cao J, Dacal M, Zhou X, Li J, Xia J, Niu S, Yang H, Shelton S, Guo W, van Groenigen KJ. Differential responses of carbon-degrading enzyme activities to warming: Implications for soil respiration. GLOBAL CHANGE BIOLOGY 2018; 24:4816-4826. [PMID: 29999577 DOI: 10.1111/gcb.14394] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Extracellular enzymes catalyze rate-limiting steps in soil organic matter decomposition, and their activities (EEAs) play a key role in determining soil respiration (SR). Both EEAs and SR are highly sensitive to temperature, but their responses to climate warming remain poorly understood. Here, we present a meta-analysis on the response of soil cellulase and ligninase activities and SR to warming, synthesizing data from 56 studies. We found that warming significantly enhanced ligninase activity by 21.4% but had no effect on cellulase activity. Increases in ligninase activity were positively correlated with changes in SR, while no such relationship was found for cellulase. The warming response of ligninase activity was more closely related to the responses of SR than a wide range of environmental and experimental methodological factors. Furthermore, warming effects on ligninase activity increased with experiment duration. These results suggest that soil microorganisms sustain long-term increases in SR with warming by gradually increasing the degradation of the recalcitrant carbon pool.
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Affiliation(s)
- Ji Chen
- Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, China
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Aarhus University Centre for Circular Bioeconomy, Department of Agroecology, Aarhus University, Tjele, Denmark
| | - Yiqi Luo
- Center for Ecosystem Science and Society, Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
- Department for Earth System Science, Tsinghua University, Beijing, China
| | - Pablo García-Palacios
- Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, Móstoles, Spain
| | - Junji Cao
- State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China
| | - Marina Dacal
- Departamento de Biología y Geología, Física y Química Inorgánica y Analítica, Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, Móstoles, Spain
| | - Xuhui Zhou
- Center for Global Change and Ecological Forecasting, Tiantong National Field Observation Station for Forest Ecosystem, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | - Jianwei Li
- Department of Agriculture and Environmental Sciences, Tennessee State University, Nashville, Tennessee
| | - Jianyang Xia
- Center for Global Change and Ecological Forecasting, Tiantong National Field Observation Station for Forest Ecosystem, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Shuli Niu
- Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Huiyi Yang
- College of Engineering Mathematics and Physical Sciences, University of Exeter, Exeter, UK
| | - Shelby Shelton
- Department of Emergency Medicine, University of Colorado Denver, Denver, Colorado
| | - Wei Guo
- Department of Earth and Environmental Sciences, Xi'an Jiaotong University, Xi'an, China
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35
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Johnston ASA, Sibly RM. The influence of soil communities on the temperature sensitivity of soil respiration. Nat Ecol Evol 2018; 2:1597-1602. [PMID: 30150743 DOI: 10.1038/s41559-018-0648-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 07/26/2018] [Indexed: 11/09/2022]
Abstract
Soil respiration represents a major carbon flux between terrestrial ecosystems and the atmosphere, and is expected to accelerate under climate warming. Despite its importance in climate change forecasts, however, our understanding of the effects of temperature on soil respiration (RS) is incomplete. Using a metabolic ecology approach we link soil biota metabolism, community composition and heterotrophic activity to predict RS rates across five biomes. We find that accounting for the ecological mechanisms underpinning decomposition processes predicts climatological RS variations observed in an independent dataset (n = 312). The importance of community composition is evident because without it RS is substantially underestimated. With increasing temperature, we predict a latitudinal increase in RS temperature sensitivity, with Q10 values ranging between 2.33 ± 0.01 in tropical forests to 2.72 ± 0.03 in tundra. This global trend has been widely observed, but has not previously been linked to soil communities.
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Affiliation(s)
| | - Richard M Sibly
- School of Biological Sciences, University of Reading, Reading, UK
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36
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Yu H, Deng Y, He Z, Van Nostrand JD, Wang S, Jin D, Wang A, Wu L, Wang D, Tai X, Zhou J. Elevated CO 2 and Warming Altered Grassland Microbial Communities in Soil Top-Layers. Front Microbiol 2018; 9:1790. [PMID: 30154760 PMCID: PMC6102351 DOI: 10.3389/fmicb.2018.01790] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/17/2018] [Indexed: 11/13/2022] Open
Abstract
As two central issues of global climate change, the continuous increase of both atmospheric CO2 concentrations and global temperature has profound effects on various terrestrial ecosystems. Microbial communities play pivotal roles in these ecosystems by responding to environmental changes through regulation of soil biogeochemical processes. However, little is known about the effect of elevated CO2 (eCO2) and global warming on soil microbial communities, especially in semiarid zones. We used a functional gene array (GeoChip 3.0) to measure the functional gene composition, structure, and metabolic potential of soil microbial communities under warming, eCO2, and eCO2 + warming conditions in a semiarid grassland. The results showed that the composition and structure of microbial communities was dramatically altered by multiple climate factors, including elevated CO2 and increased temperature. Key functional genes, those involved in carbon (C) degradation and fixation, methane metabolism, nitrogen (N) fixation, denitrification and N mineralization, were all stimulated under eCO2, while those genes involved in denitrification and ammonification were inhibited under warming alone. The interaction effects of eCO2 and warming on soil functional processes were similar to eCO2 alone, whereas some genes involved in recalcitrant C degradation showed no significant changes. In addition, canonical correspondence analysis and Mantel test results suggested that NO3-N and moisture significantly correlated with variations in microbial functional genes. Overall, this study revealed the possible feedback of soil microbial communities to multiple climate change factors by the suppression of N cycling under warming, and enhancement of C and N cycling processes under either eCO2 alone or in interaction with warming. These findings may enhance our understanding of semiarid grassland ecosystem responses to integrated factors of global climate change.
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Affiliation(s)
- Hao Yu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.,College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, China
| | - Ye Deng
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
| | - Zhili He
- Environmental Microbiome Research Center, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Joy D Van Nostrand
- Institute for Environmental Genomics, The University of Oklahoma, Norman, OK, United States
| | - Shang Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
| | - Decai Jin
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
| | - Aijie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.,State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Liyou Wu
- Institute for Environmental Genomics, The University of Oklahoma, Norman, OK, United States
| | - Daohan Wang
- College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, China
| | - Xin Tai
- College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, China
| | - Jizhong Zhou
- Institute for Environmental Genomics, The University of Oklahoma, Norman, OK, United States.,State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
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37
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Soil Properties Drive Microbial Community Structure in a Large Scale Transect in South Eastern Australia. Sci Rep 2018; 8:11725. [PMID: 30082740 PMCID: PMC6078944 DOI: 10.1038/s41598-018-30005-8] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 07/17/2018] [Indexed: 11/08/2022] Open
Abstract
Soil microbial communities directly affect soil functionality through their roles in the cycling of soil nutrients and carbon storage. Microbial communities vary substantially in space and time, between soil types and under different land management. The mechanisms that control the spatial distributions of soil microbes are largely unknown as we have not been able to adequately upscale a detailed analysis of the microbiome in a few grams of soil to that of a catchment, region or continent. Here we reveal that soil microbes along a 1000 km transect have unique spatial structures that are governed mainly by soil properties. The soil microbial community assessed using Phospholipid Fatty Acids showed a strong gradient along the latitude gradient across New South Wales, Australia. We found that soil properties contributed the most to the microbial distribution, while other environmental factors (e.g., temperature, elevation) showed lesser impact. Agricultural activities reduced the variation of the microbial communities, however, its influence was local and much less than the overall influence of soil properties. The ability to predict the soil and environmental factors that control microbial distribution will allow us to predict how future soil and environmental change will affect the spatial distribution of microbes.
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38
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Jacob JM, Karthik C, Saratale RG, Kumar SS, Prabakar D, Kadirvelu K, Pugazhendhi A. Biological approaches to tackle heavy metal pollution: A survey of literature. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 217:56-70. [PMID: 29597108 DOI: 10.1016/j.jenvman.2018.03.077] [Citation(s) in RCA: 228] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 03/07/2018] [Accepted: 03/17/2018] [Indexed: 05/21/2023]
Abstract
Pollution by heavy metals has been identified as a global threat since the inception of industrial revolution. Heavy metal contamination induces serious health and environmental hazards due to its toxic nature. Remediation of heavy metals by conventional methods is uneconomical and generates a large quantity of secondary wastes. On the other hand, biological agents such as plants, microorganisms etc. offer easy and eco-friendly ways for metal removal; hence, considered as efficient and alternative tools for metal removal. Bioremediation involves adsorption, reduction or removal of contaminants from the environment through biological resources (both microorganisms and plants). The heavy metal remediation properties of microorganisms stem from their self defense mechanisms such as enzyme secretion, cellular morphological changes etc. These defence mechanisms comprise the active involvement of microbial enzymes such as oxidoreductases, oxygenases etc, which influence the rates of bioremediation. Further, immobilization techniques are improving the practice at industrial scales. This article summarizes the various strategies inherent in the biological sorption and remediation of heavy metals.
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Affiliation(s)
- Jaya Mary Jacob
- Department of Biotechnology and Biochemical Engineering, Sree Buddha College of Engineering, APJ Abdul Kalam Kerala Technological University, Kerala, India
| | - Chinnannan Karthik
- DRDO-BU CLS, Bharathiar University Campus, Coimbatore-46, Tamil Nadu, India
| | - Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggido, 10326, Republic of Korea
| | - Smita S Kumar
- Center for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, Delhi, 110016, India
| | | | - K Kadirvelu
- DRDO-BU CLS, Bharathiar University Campus, Coimbatore-46, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- Innovative Green Product Synthesis and Renewable Environment Development Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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39
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Wang Q, Liu S, Tian P. Carbon quality and soil microbial property control the latitudinal pattern in temperature sensitivity of soil microbial respiration across Chinese forest ecosystems. GLOBAL CHANGE BIOLOGY 2018; 24:2841-2849. [PMID: 29476638 DOI: 10.1111/gcb.14105] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
Understanding the temperature sensitivity (Q10 ) of soil organic C (SOC) decomposition is critical to quantifying the climate-carbon cycle feedback and predicting the response of ecosystems to climate change. However, the driving factors of the spatial variation in Q10 at a continental scale are fully unidentified. In this study, we conducted a novel incubation experiment with periodically varying temperature based on the mean annual temperature of the soil origin sites. A total of 140 soil samples were collected from 22 sites along a 3,800 km long north-south transect of forests in China, and the Q10 of soil microbial respiration and corresponding environmental variables were measured. Results showed that changes in the Q10 values were nonlinear with latitude, particularly showing low Q10 values in subtropical forests and high Q10 values in temperate forests. The soil C:N ratio was positively related to the Q10 values, and coniferous forest soils with low SOC quality had higher Q10 values than broadleaved forest soils with high SOC quality, which supported the "C quality temperature" hypothesis. Out of the spatial variations in Q10 across all ecosystems, gram-negative bacteria exhibited the most importance in regulating the variation in Q10 and contributed 25.1%, followed by the C:N ratio (C quality), fungi, and the fungi:bacteria ratio. However, the dominant factors that regulate the regional variations in Q10 differed among the tropical, subtropical, and temperate forest ecosystems. Overall, our findings highlight the importance of C quality and microbial controls over Q10 value in China's forest ecosystems. Meanwhile, C dynamics in temperate forests under a global warming scenario can be robustly predicted through the incorporation of substrate quality and microbial property into models.
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Affiliation(s)
- Qingkui Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, China
- Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Huitong, China
| | - Shengen Liu
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Peng Tian
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang, China
- University of Chinese Academy of Sciences, Beijing, China
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40
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Zeng J, Shen JP, Wang JT, Hu HW, Zhang CJ, Bai R, Zhang LM, He JZ. Impacts of Projected Climate Warming and Wetting on Soil Microbial Communities in Alpine Grassland Ecosystems of the Tibetan Plateau. MICROBIAL ECOLOGY 2018; 75:1009-1023. [PMID: 29124311 DOI: 10.1007/s00248-017-1098-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Climate change is projected to have impacts on precipitation and temperature regimes in drylands of high elevation regions, with especially large effects in the Qinghai-Tibetan Plateau. However, there was limited information about how the projected climate change will impact on the soil microbial community and their activity in the region. Here, we present results from a study conducted across 72 soil samples from 24 different sites along a temperature and precipitation gradient (substituted by aridity index ranging from 0.079 to 0.89) of the Plateau, to assess how changes in aridity affect the abundance, community composition, and diversity of bacteria, ammonia-oxidizers, and denitrifers (nirK/S and nosZ genes-containing communities) as well as nitrogen (N) turnover enzyme activities. We found V-shaped or inverted V-shaped relationships between the aridity index (AI) and soil microbial parameters (gene abundance, community structures, microbial diversity, and N turnover enzyme activities) with a threshold at AI = 0.27. The increasing or decreasing rates of the microbial parameters were higher in areas with AI < 0.27 (alpine steppes) than in mesic areas with 0.27 < AI < 0.89 (alpine meadow and swamp meadow). The results indicated that the projected warming and wetting have a strong impact on soil microbial communities in the alpine steppes.
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Affiliation(s)
- Jun Zeng
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing, 100049, China
- Institute of Applied Microbiology, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091, China
| | - Ju-Pei Shen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
- College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jun-Tao Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Hang-Wei Hu
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Cui-Jing Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Ren Bai
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Li-Mei Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Ji-Zheng He
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
- College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing, 100049, China.
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia.
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She W, Bai Y, Zhang Y, Qin S, Feng W, Sun Y, Zheng J, Wu B. Resource Availability Drives Responses of Soil Microbial Communities to Short-term Precipitation and Nitrogen Addition in a Desert Shrubland. Front Microbiol 2018; 9:186. [PMID: 29479346 PMCID: PMC5811472 DOI: 10.3389/fmicb.2018.00186] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/26/2018] [Indexed: 11/13/2022] Open
Abstract
Desert microbes are expected to be substantially sensitive to global environmental changes, such as precipitation changes and elevated nitrogen deposition. However, the effects of precipitation changes and nitrogen enrichment on their diversity and community composition remain poorly understood. We conducted a field experiment over 2 years with multi-level precipitation and nitrogen addition in a desert shrubland of northern China, to examine the responses of soil bacteria and fungi in terms of diversity and community composition and to explore the roles of plant and soil factors in structuring microbial communities. Water addition significantly increased soil bacterial diversity and altered the community composition by increasing the relative abundances of stress-tolerant (dormant) taxa (e.g., Acidobacteria and Planctomycetes); however, nitrogen addition had no substantial effects. Increased precipitation and nitrogen did not impact soil fungal diversity, but significantly shifted the fungal community composition. Specifically, water addition reduced the relative abundances of drought-tolerant taxa (e.g., the orders Pezizales, Verrucariales, and Agaricales), whereas nitrogen enrichment decreased those of oligotrophic taxa (e.g., the orders Agaricales and Sordariales). Shifts in microbial community composition under water and nitrogen addition occurred primarily through changing resource availability rather than plant community. Our results suggest that water and nitrogen addition affected desert microbes in different ways, with watering shifting stress-tolerant traits and fertilization altering copiotrophic/oligotrophic traits of the microbial communities. These findings highlight the importance of resource availability in driving the desert microbial responses to short-term environmental changes.
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Affiliation(s)
- Weiwei She
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Yuxuan Bai
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Yuqing Zhang
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China.,Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Shugao Qin
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China.,Engineering Research Center of Forestry Ecological Engineering, Ministry of Education, Beijing Forestry University, Beijing, China
| | - Wei Feng
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China.,Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Yanfei Sun
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Jing Zheng
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Bin Wu
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China.,Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, China
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42
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Tang Z, Sun X, Luo Z, He N, Sun OJ. Effects of temperature, soil substrate, and microbial community on carbon mineralization across three climatically contrasting forest sites. Ecol Evol 2018; 8:879-891. [PMID: 29375762 PMCID: PMC5773329 DOI: 10.1002/ece3.3708] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/11/2017] [Accepted: 11/14/2017] [Indexed: 11/18/2022] Open
Abstract
How biotic and abiotic factors influence soil carbon (C) mineralization rate (RS) has recently emerged as one of the focal interests in ecological studies. To determine the relative effects of temperature, soil substrate and microbial community on Rs, we conducted a laboratory experiment involving reciprocal microbial inoculations of three zonal forest soils, and measured RS over a 61‐day period at three temperatures (5, 15, and 25°C). Results show that both Rs and the cumulative emission of C (Rcum), normalized to per unit soil organic C (SOC), were significantly affected by incubation temperature, soil substrate, microbial inoculum treatment, and their interactions (p < .05). Overall, the incubation temperature had the strongest effect on the RS; at given temperatures, soil substrate, microbial inoculum treatment, and their interaction all significantly affected both Rs (p < .001) and Rcum (p ≤ .01), but the effect of soil substrate was much stronger than others. There was no consistent pattern of thermal adaptation in microbial decomposition of SOC in the reciprocal inoculations. Moreover, when different sources of microbial inocula were introduced to the same soil substrate, the microbial community structure converged with incubation without altering the overall soil enzyme activities; when different types of soil substrate were inoculated with the same sources of microbial inocula, both the microbial community structure and soil enzyme activities diverged. Overall, temperature plays a predominant role in affecting Rs and Rcum, while soil substrate determines the mineralizable SOC under given conditions. The role of microbial community in driving SOC mineralization is weaker than that of climate and soil substrate, because soil microbial community is both affected, and adapts to, climatic factors and soil matrix.
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Affiliation(s)
- Zuoxin Tang
- College of Forest Science Beijing Forestry University Beijing China
| | - Xiaolu Sun
- College of Forest Science Beijing Forestry University Beijing China
| | | | - Nianpeng He
- Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China
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43
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Spiesman BJ, Kummel H, Jackson RD. Carbon storage potential increases with increasing ratio of C 4 to C 3 grass cover and soil productivity in restored tallgrass prairies. Oecologia 2017; 186:565-576. [PMID: 29218539 DOI: 10.1007/s00442-017-4036-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 12/03/2017] [Indexed: 10/18/2022]
Abstract
Long-term soil carbon (C) storage is essential for reducing CO2 in the atmosphere. Converting unproductive and environmentally sensitive agricultural lands to grasslands for bioenergy production may enhance C storage. However, a better understanding of the interacting effects of grass functional composition (i.e., relative abundance of C4 and C3 grass cover) and soil productivity on C storage will help guide sustainable grassland management. Our objective was to examine the relationship between grass functional composition and potential C storage and how it varies with potential soil productivity. We estimated C inputs from above- and belowground net primary productivity (ANPP and BNPP), and heterotrophic respiration (R H) to calculate net ecosystem production (NEP), a measure of potential soil C storage, in grassland plots of relatively high- and low-productivity soils spanning a gradient in the ratio of C4 to C3 grass cover (C4:C3). NEP increased with increasing C4:C3, but only in potentially productive soils. The positive relationship likely stemmed from increased ANPP, rather than BNPP, which was possibly related to efficient resource-use and physiological/anatomical advantages of C4 plants. R H was negatively correlated with C4:C3, possibly because of changes in microclimate or plant-microbe interactions. It is possible that in potentially productive soils, C storage can be enhanced by favoring C4 over C3 grasses through increased ANPP and BNPP and reduced R H. Results also suggest that potential C storage gains from C4 productivity would not be undermined by a corresponding increase in R H.
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Affiliation(s)
- Brian J Spiesman
- Department of Entomology, University of Wisconsin-Madison, Madison, USA. .,DOE-Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, USA.
| | - Herika Kummel
- Department of Agronomy, University of Wisconsin-Madison, Madison, USA
| | - Randall D Jackson
- DOE-Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, USA.,Department of Agronomy, University of Wisconsin-Madison, Madison, USA
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44
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Hines J, Pabst S, Mueller KE, Blumenthal DM, Cesarz S, Eisenhauer N. Soil‐mediated effects of global change on plant communities depend on plant growth form. Ecosphere 2017. [DOI: 10.1002/ecs2.1996] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Jes Hines
- Institute of Ecology Friedrich Schiller University Jena Dornburger Strasse 159 07743 JenaGermany
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 LeipzigGermany
- Institute of Biology Leipzig University Deutscher Platz 5e 04103 LeipzigGermany
| | - Susann Pabst
- Institute of Ecology Friedrich Schiller University Jena Dornburger Strasse 159 07743 JenaGermany
| | - Kevin E. Mueller
- Rangeland Resources and Systems Research Unit USDA Agricultural Research Service Fort Collins Colorado 80526 USA
| | - Dana M. Blumenthal
- Rangeland Resources and Systems Research Unit USDA Agricultural Research Service Fort Collins Colorado 80526 USA
| | - Simone Cesarz
- Institute of Ecology Friedrich Schiller University Jena Dornburger Strasse 159 07743 JenaGermany
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 LeipzigGermany
- Institute of Biology Leipzig University Deutscher Platz 5e 04103 LeipzigGermany
| | - Nico Eisenhauer
- Institute of Ecology Friedrich Schiller University Jena Dornburger Strasse 159 07743 JenaGermany
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 LeipzigGermany
- Institute of Biology Leipzig University Deutscher Platz 5e 04103 LeipzigGermany
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45
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Bai Z, Xie H, Kao-Kniffin J, Chen B, Shao P, Liang C. Shifts in microbial trophic strategy explain different temperature sensitivity of CO2 flux under constant and diurnally varying temperature regimes. FEMS Microbiol Ecol 2017; 93:3814241. [PMID: 28499007 DOI: 10.1093/femsec/fix063] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 05/09/2017] [Indexed: 12/31/2022] Open
Abstract
Understanding soil CO2 flux temperature sensitivity (Q10) is critical for predicting ecosystem-level responses to climate change. Yet, the effects of warming on microbial CO2 respiration still remain poorly understood under current Earth system models, partly as a result of thermal acclimation of organic matter decomposition. We conducted a 117-day incubation experiment under constant and diurnally varying temperature treatments based on four forest soils varying in vegetation stand and soil horizon. Our results showed that Q10 was greater under varying than constant temperature regimes. This distinction was most likely attributed to differences in the depletion of available carbon between constant high and varying high-temperature treatments, resulting in significantly higher rates of heterotrophic respiration in the varying high-temperature regime. Based on 16S rRNA gene sequencing data using Illumina, the varying high-temperature regime harbored higher prokaryotic alpha-diversity, was more dominated by the copiotrophic strategists and sustained a distinct community composition, in comparison to the constant-high treatment. We found a tightly coupled relationship between Q10 and microbial trophic guilds: the copiotrophic prokaryotes responded positively with high Q10 values, while the oligotrophs showed a negative response. Effects of vegetation stand and soil horizon consistently supported that the copiotrophic vs oligotrophic strategists determine the thermal sensitivity of CO2 flux. Our observations suggest that incorporating prokaryotic functional traits, such as shifts between copiotrophy and oligotrophy, is fundamental to our understanding of thermal acclimation of microbially mediated soil organic carbon cycling. Inclusion of microbial functional shifts may provide the potential to improve our projections of responses in microbial community and CO2 efflux to a changing environment in forest ecosystems.
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Affiliation(s)
- Zhen Bai
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Hongtu Xie
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jenny Kao-Kniffin
- School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
| | - Baodong Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pengshuai Shao
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Chao Liang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
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46
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van Groenigen KJ, Osenberg CW, Terrer C, Carrillo Y, Dijkstra FA, Heath J, Nie M, Pendall E, Phillips RP, Hungate BA. Faster turnover of new soil carbon inputs under increased atmospheric CO 2. GLOBAL CHANGE BIOLOGY 2017; 23:4420-4429. [PMID: 28480591 DOI: 10.1111/gcb.13752] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 04/13/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Rising levels of atmospheric CO2 frequently stimulate plant inputs to soil, but the consequences of these changes for soil carbon (C) dynamics are poorly understood. Plant-derived inputs can accumulate in the soil and become part of the soil C pool ("new soil C"), or accelerate losses of pre-existing ("old") soil C. The dynamics of the new and old pools will likely differ and alter the long-term fate of soil C, but these separate pools, which can be distinguished through isotopic labeling, have not been considered in past syntheses. Using meta-analysis, we found that while elevated CO2 (ranging from 550 to 800 parts per million by volume) stimulates the accumulation of new soil C in the short term (<1 year), these effects do not persist in the longer term (1-4 years). Elevated CO2 does not affect the decomposition or the size of the old soil C pool over either temporal scale. Our results are inconsistent with predictions of conventional soil C models and suggest that elevated CO2 might increase turnover rates of new soil C. Because increased turnover rates of new soil C limit the potential for additional soil C sequestration, the capacity of land ecosystems to slow the rise in atmospheric CO2 concentrations may be smaller than previously assumed.
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Affiliation(s)
- Kees Jan van Groenigen
- Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA
| | | | - César Terrer
- AXA Chair Programme in Biosphere and Climate Impacts, Department of Life Sciences, Imperial College London, Ascot, UK
| | - Yolima Carrillo
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | - Feike A Dijkstra
- Centre for Carbon, Water and Food, School of Life and Environmental Sciences, The University of Sydney, Eveleigh, NSW, Australia
| | - James Heath
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - Ming Nie
- Ministry of Education Key Lab for Biodiversity Science and Ecological Engineering, The Institute of Biodiversity Science, Fudan University, Shanghai, China
| | - Elise Pendall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia
| | | | - Bruce A Hungate
- Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
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47
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Wagner R, Zona D, Oechel W, Lipson D. Microbial community structure and soil pH correspond to methane production in Arctic Alaska soils. Environ Microbiol 2017; 19:3398-3410. [PMID: 28677239 DOI: 10.1111/1462-2920.13854] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/22/2017] [Accepted: 06/30/2017] [Indexed: 01/09/2023]
Abstract
While there is no doubt that biogenic methane production in the Arctic is an important aspect of global methane emissions, the relative roles of microbial community characteristics and soil environmental conditions in controlling Arctic methane emissions remains uncertain. Here, relevant methane-cycling microbial groups were investigated at two remote Arctic sites with respect to soil potential methane production (PMP). Percent abundances of methanogens and iron-reducing bacteria correlated with increased PMP, while methanotrophs correlated with decreased PMP. Interestingly, α-diversity of the methanogens was positively correlated with PMP, while β-diversity was unrelated to PMP. The β-diversity of the entire microbial community, however, was related to PMP. Shannon diversity was a better correlate of PMP than Simpson diversity across analyses, while rarefied species richness was a weak correlate of PMP. These results demonstrate the following: first, soil pH and microbial community structure both probably control methane production in Arctic soils. Second, there may be high functional redundancy in the methanogens with regard to methane production. Third, iron-reducing bacteria co-occur with methanogens in Arctic soils, and iron-reduction-mediated effects on methanogenesis may be controlled by α- and β-diversity. And finally, species evenness and rare species abundances may be driving relationships between microbial groups, influencing Arctic methane production.
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Affiliation(s)
- Robert Wagner
- San Diego State University, Biology, San Diego, CA, USA
| | | | - Walter Oechel
- San Diego State University, Biology, San Diego, CA, USA
| | - David Lipson
- San Diego State University, Biology, San Diego, CA, USA
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48
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Alpine soil carbon is vulnerable to rapid microbial decomposition under climate cooling. ISME JOURNAL 2017; 11:2102-2111. [PMID: 28534876 DOI: 10.1038/ismej.2017.75] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 03/14/2017] [Accepted: 03/23/2017] [Indexed: 11/08/2022]
Abstract
As climate cooling is increasingly regarded as important natural variability of long-term global warming trends, there is a resurging interest in understanding its impact on biodiversity and ecosystem functioning. Here, we report a soil transplant experiment from lower to higher elevations in a Tibetan alpine grassland to simulate the impact of cooling on ecosystem community structure and function. Three years of cooling resulted in reduced plant productivity and microbial functional potential (for example, carbon respiration and nutrient cycling). Microbial genetic markers associated with chemically recalcitrant carbon decomposition remained unchanged despite a decrease in genes associated with chemically labile carbon decomposition. As a consequence, cooling-associated changes correlated with a decrease in soil organic carbon (SOC). Extrapolation of these results suggests that for every 1 °C decrease in annual average air temperature, 0.1 Pg (0.3%) of SOC would be lost from the Tibetan plateau. These results demonstrate that microbial feedbacks to cooling have the potential to differentially impact chemically labile and recalcitrant carbon turnover, which could lead to strong, adverse consequences on soil C storage. Our findings are alarming, considering the frequency of short-term cooling and its scale to disrupt ecosystems and biogeochemical cycling.
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49
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Sun D, Li K, Bi Q, Zhu J, Zhang Q, Jin C, Lu L, Lin X. Effects of organic amendment on soil aggregation and microbial community composition during drying-rewetting alternation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:735-743. [PMID: 27664760 DOI: 10.1016/j.scitotenv.2016.09.112] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/14/2016] [Accepted: 09/14/2016] [Indexed: 05/29/2023]
Abstract
The alternation of drying and rewetting events could dramatically affect the biological and structural properties of soil and consequently influence nutrient transformation. To examine whether organic amendments could improve the resistance and resilience of microbial function (extracellular enzyme activities), community composition (phospholipid fatty acids), and soil structure to drying-rewetting alternation, cropland soils with or without wheat-straw amendment were allowed to desiccate in a microcosm for two months, followed by moist incubation for five weeks, and continuously moist treatments were maintained at 50% water holding capacity during the entire period, as a control treatment. Straw amendment increased microbial biomass, extracellular enzyme activities, the relative abundance of fungal groups, dissolved organic carbon, and proportion of large macroaggregates (>2000μm), but decreased mineral nitrogen and available phosphorus. The drying-rewetting treatment increased microbial biomass carbon and β-glucosidase activities by 10% and 13% in straw-amended soils, respectively, but not in unamended soils, and decreased the urease and alkaline phosphomonoesterase activities by >15% in unamended soils, but not in amended soils. The contents of fungi, actinomycetes, Pseudomonas spp., and Bacillus spp. decreased with drying, and more so with the subsequent rewetting, but recovered by the end of the experiment. The drying-rewetting treatment caused a decrease in the nitrate content in both soils (>10%) and an increase in the macroaggregates of straw-amended soils (~8%). These results indicated that improved soil aggregation, as a result of straw amendment, protected microbial communities from drought stress and that nutrient acquisition promoted the post-rewetting colonization of heterotrophic communities characterized by hydrolase production, which consequently facilitated aggregate re-formation. Thus, straw amendment positively contributed to aggregate turnover and to both microbial and enzymatic responses to drying-rewetting events, which suggests that straw amendment is favorable to maintain soil function under conditions of increasing rainfall variability.
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Affiliation(s)
- Dasheng Sun
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Kejie Li
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qingfang Bi
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jun Zhu
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qichun Zhang
- Institute of Soil and Water Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Chongwei Jin
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lingli Lu
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xianyong Lin
- Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China; MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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50
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Zhang X, Johnston ER, Li L, Konstantinidis KT, Han X. Experimental warming reveals positive feedbacks to climate change in the Eurasian Steppe. ISME JOURNAL 2016; 11:885-895. [PMID: 27996978 DOI: 10.1038/ismej.2016.180] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 10/20/2016] [Accepted: 10/28/2016] [Indexed: 02/01/2023]
Abstract
Identifying soil microbial feedbacks to increasing temperatures and moisture alterations is critical for predicting how terrestrial ecosystems will respond to climate change. We performed a 5-year field experiment manipulating warming, watering and their combination in a semiarid temperate steppe in northern China. Warming stimulated the abundance of genes responsible for degrading recalcitrant soil organic matter (SOM) and reduced SOM content by 13%. Watering, and warming plus watering also increased the abundance of recalcitrant SOM catabolism pathways, but concurrently promoted plant growth and increased labile SOM content, which somewhat offset SOM loss. The treatments also increased microbial biomass, community complexity and metabolic potential for nitrogen and sulfur assimilation. Both microbial and plant community composition shifted with the treatment conditions, and the sample-to-sample compositional variations of the two communities (pairwise β-diversity distances) were significantly correlated. In particular, microbial community composition was substantially correlated with the dominant plant species (~0.54 Spearman correlation coefficient), much more than with measured soil indices, affirming a tight coupling between both biological communities. Collectively, our study revealed the direction and underlying mechanisms of microbial feedbacks to warming and suggested that semiarid regions of northern steppes could act as a net carbon source under increased temperatures, unless precipitation increases concurrently.
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Affiliation(s)
- Ximei Zhang
- Key Laboratory of Dryland Agriculture, MOA, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China.,School of Biology, Georgia Institute of Technology, Atlanta, GA, USA
| | - Eric R Johnston
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Linghao Li
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Konstantinos T Konstantinidis
- School of Biology, Georgia Institute of Technology, Atlanta, GA, USA.,School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Xingguo Han
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
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