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Ngaba MJY, Uwiragiye Y, Hu B, Zhou J, Dannenmann M, Calanca P, Bol R, de Vries W, Kuzyakov Y, Rennenberg H. Effects of environmental changes on soil respiration in arid, cold, temperate, and tropical zones. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 952:175943. [PMID: 39218094 DOI: 10.1016/j.scitotenv.2024.175943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 08/28/2024] [Accepted: 08/29/2024] [Indexed: 09/04/2024]
Abstract
Soil respiration (Rs) is projected to be substantially affected by climate change, impacting the storage, equilibrium, and movement of terrestrial carbon (C). However, uncertainties surrounding the responses of Rs to climate change and soil nitrogen (N) enrichment are linked to mechanisms specific to diverse climate zones. A comprehensive meta-analysis was conducted to address this, evaluating the global effects of warming, increased precipitation, and N enrichment on Rs across various climate zones and ecosystems. Data from 123 studies, encompassing a total of 10,377 worldwide observations, were synthesized for this purpose. Annual Rs were modeled and their uncertainties were associated with a 1-km2 resolution global Rs database spanning from 1961 to 2022. Calibrating Rs using ensemble machine learning (EML) and employing 10-fold cross-validation, 13 environmental covariates were utilized. The meta-analysis findings revealed an upsurge in Rs rates in response to warming, with tropical, arid, and temperate climate zones exhibiting increases of 12 %, 13 %, and 16 %, respectively. Furthermore, increased precipitation led to stimulated Rs rates of 11 % and 9 % in tropical and temperate zones, respectively, while N deposition affected Rs in cold (+6 %) and tropical (+5 %) climate zones. The machine learning technique estimated the global soil respiration to range from 91 to 171 Pg C yr-1, with an average Rs of 700 ± 300 g C m-2 yr-1. The values ranged between 314 and 2500 g C m-2 yr-1, with the lowest and highest values observed in cold and tropical zones, respectively. Spatial variation in Rs was most pronounced in low-latitude areas, particularly in tropical rainforests and monsoon zones. Temperature, precipitation, and N deposition were identified as crucial environmental factors exerting significant influences on Rs rates worldwide. These factors underscore the interconnectedness between climate and ecosystem processes, therefore requiring explicit considerations of different climate zones when assessing responses of Rs to global change.
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Affiliation(s)
- Mbezele Junior Yannick Ngaba
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing 400715, China; Higher Technical Teacher' Training College of Ebolowa, University of Ebolowa (HTTTC), 886 Ebolowa, Cameroon
| | - Yves Uwiragiye
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; University of Technology and Arts of Byumba, Rwanda
| | - Bin Hu
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing 400715, China.
| | - Jianbin Zhou
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Michael Dannenmann
- Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Garmisch-Partenkirchen 82467, Germany
| | | | - Roland Bol
- Institute of Bio- and Geosciences, Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; School of Natural Sciences, Environment Centre Wales, Bangor University, Bangor, United Kingdom
| | - Wim de Vries
- Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Goettingen, 37077 Göttingen, Germany; Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Heinz Rennenberg
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Chongqing 400715, China
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Du L, Luo Y, Zhang J, Shen Y, Zhang J, Tian R, Shao W, Xu Z. Reduction in precipitation amount, precipitation events, and nitrogen addition change ecosystem carbon fluxes differently in a semi-arid grassland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172276. [PMID: 38583634 DOI: 10.1016/j.scitotenv.2024.172276] [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: 12/29/2023] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
The increases in extent and frequency of extreme drought events and increased nitrogen (N) deposition due to global change are expected to have profound impacts on carbon cycling in semi-arid grasslands. However, how ecosystem CO2 exchange processes respond to different drought scenarios individually and interactively with N addition remains uncertain. In this study, we experimentally explored the effects of different drought scenarios (early season extreme drought, 50 % reduction in precipitation amount, and 50 % reduction in precipitation events) and N addition on net ecosystem CO2 exchange (NEE), ecosystem respiration (ER), and gross ecosystem productivity (GEP) over three growing seasons (2019-2021) in a semi-arid grassland in northern China. The growing-season ecosystem carbon fluxes in response to drought and N addition were influenced by inter-annual precipitation changes, with 2019 as a normal precipitation year, and 2020 and 2021 as wet years. Early season extreme drought stimulated NEE by reducing ER. 50 % reduction in precipitation amount decreased ER and GEP consistently in three years, but only significantly suppressed NEE in 2019. 50 % reduction in precipitation events stimulated NEE. Nitrogen addition stimulated NEE, ER, and GEP, but only significantly in wet years. The structural equation models showed that changes in carbon fluxes were regulated by soil moisture, soil temperature, microbial biomass nitrogen (MBN), and the key plant functional traits. Decreased community-weighted means of specific leaf area (CWMSLA) was closely related to the reduced ER and GEP under early season extreme drought and 50 % reduction in precipitation amount. While increased community-weighted means of plant height (CWMPH) largely accounted for the stimulated ER and GEP under 50 % reduction in precipitation events. Our study stresses the distinct effects of different drought scenarios and N enrichment on carbon fluxes, and highlights the importance of soil traits and the key plant traits in determining carbon exchange in this water-limited ecosystem.
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Affiliation(s)
- Lan Du
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Yonghong Luo
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Jiatao Zhang
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Yan Shen
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Jinbao Zhang
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Ru Tian
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Wenqian Shao
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Zhuwen Xu
- Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
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3
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Yang H, Guo Y, Fang N, Dong B, Wu X. Greenhouse gas emissions of sewage sludge land application in urban green space: A field experiment in a Bermuda grassland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172106. [PMID: 38556015 DOI: 10.1016/j.scitotenv.2024.172106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/20/2024] [Accepted: 03/28/2024] [Indexed: 04/02/2024]
Abstract
Sewage sludge land application is recognized as a strategy for recycling resource and replenishing soil nutrients. However, the subsequent greenhouse gas emissions following this practice are not yet fully understood, and the lack of quantitative research and field experiments monitoring these emissions hampers the establishment of reliable emission factors. This study investigated the greenhouse gas emission characteristics of sewage sludge land application through a field experiment that monitoring soil greenhouse gas fluxes. Seven nitrogen input treatments were implemented in a typical Bermuda grassland in China, with D and C representing the amendment of digested and composted sludge, respectively, at the nitrogen input rate of 0, 100, 200, and 300 kg N ha-1. Soil CH4, CO2, and N2O fluxes were measured throughout the entire experimental period, and soil samples from different treatments at various growth stages were analyzed. The results revealed that sewage sludge land application significantly increased soil N2O and CO2 emissions while slightly reducing soil CH4 uptake. The increased CO2 emissions were biogenic and carbon-neutral, mainly due to enhanced plant root respiration. The N2O emissions were the primary greenhouse gas emissions of sewage sludge land application, which were mainly concentrated in two 50-day periods following base and topdressing fertilization, respectively. N2O emissions following base fertilization by rotary tillage were substantially lower than those following topdressing fertilization. A logarithmic response relationship between N input rates and increased soil N2O emissions was observed, suggesting lower N2O emissions from sewage sludge land application compared to conventional N fertilizers at the same N input level. Future field experiments and meta-analysis are necessary to develop reliable greenhouse gas emission factors for sewage sludge land application.
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Affiliation(s)
- Hang Yang
- Shanghai Investigation, Design & Research Institute Co., Ltd, Shanghai 200050, PR China; School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd, Shanghai 200050, PR China.
| | - Ning Fang
- Shanghai Investigation, Design & Research Institute Co., Ltd, Shanghai 200050, PR China.
| | - Bin Dong
- School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
| | - Xuefei Wu
- Shanghai National Engineering Research Center of Urban Water Resources Co., Ltd., Shanghai 200082, PR China.
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4
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Kong L, Song J, Ru J, Feng J, Hou J, Wang X, Zhang Q, Wang H, Yue X, Zhou Z, Sun D, Zhang J, Li H, Fan Y, Wan S. Nitrogen addition does not alter symmetric responses of soil respiration to changing precipitation in a semi-arid grassland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 921:171170. [PMID: 38402979 DOI: 10.1016/j.scitotenv.2024.171170] [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: 10/30/2023] [Revised: 02/09/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Concurrent changing precipitation regimes and atmospheric nitrogen (N) deposition can have profound influences on soil carbon (C) cycling. However, how N enrichment regulates the responses of soil C fluxes to increasing variability of precipitation remains elusive. As part of a field precipitation gradient experiment with nine levels of precipitation amounts (-60 %, -45 %, -30 %, -15 %, ambient precipitation, +15 %, +30 %, +45 %, and +60 %) and two levels of N addition (0 and 10 g N m-2 yr-1) in a semi-arid temperate steppe on the Mongolian Plateau, this work was conducted to investigate the responses of soil respiration to decreased and increased precipitation (DP and IP), N addition, and their possible interactions. Averaged over the three years from 2019 to 2021, DP suppressed soil respiration by 16.1 %, whereas IP stimulated it by 27.4 %. Nitrogen addition decreased soil respiration by 7.1 % primarily via reducing microbial biomass C. Soil respiration showed symmetric responses to DP and IP within all the four precipitation variabilities (i.e., 15 %, 30 %, 45 %, and 60 %) under ambient N. Nevertheless, N addition did not alter the symmetric responses of soil respiration to changing precipitation due to the comparable sensitivities of microbial biomass and root growth to DP and IP under the N addition treatment. These findings indicate that intensified precipitation variability does not change but N addition could alleviate soil C releases. The unchanged symmetric responses of soil respiration to precipitation variability under N addition imply that N deposition may not change the response pattern of soil C releases to predicted increases in precipitation variability in grasslands, facilitating the robust projections of ecosystem C cycling under future global change scenarios.
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Affiliation(s)
- Lingjie Kong
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Jian Song
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Jingyi Ru
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Jiayin Feng
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Jiawei Hou
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Xueke Wang
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Qingshan Zhang
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Haidao Wang
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Xiaojing Yue
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Zhenxing Zhou
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China
| | - Dasheng Sun
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Jiajia Zhang
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China
| | - Heng Li
- International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China
| | - Yongge Fan
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China
| | - Shiqiang Wan
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, China.
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5
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Zhang L, Han G, Zhou L, Li X, Wang X, Zhang X, Xiao L. Moderate increase of precipitation stimulates CO 2 production by regulating soil organic carbon in a saltmarsh. Front Microbiol 2024; 15:1328965. [PMID: 38328421 PMCID: PMC10847529 DOI: 10.3389/fmicb.2024.1328965] [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: 10/27/2023] [Accepted: 01/03/2024] [Indexed: 02/09/2024] Open
Abstract
Saltmarsh is widely recognized as a blue carbon ecosystem with great carbon storage potential. Yet soil respiration with a major contributor of atmospheric CO2 can offset its carbon sink function. Up to date, mechanisms ruling CO2 emissions from saltmarsh soil remain unclear. In particular, the effect of precipitation on soil CO2 emissions is unclear in coastal wetlands, due the lack of outdoor data in real situations. We conducted a 7-year field manipulation experiment in a saltmarsh in the Yellow River Delta, China. Soil respiration in five treatments (-60%, -40%, +0%, +40%, and + 60% of precipitation) was measured in the field. Topsoils from the last 3 years (2019-2021) were analyzed for CO2 production potential by microcosm experiments. Furthermore, quality and quantity of soil organic carbon and microbial function were tested. Results show that only the moderate precipitation rise of +40% induced a 66.2% increase of CO2 production potential for the microcosm experiments, whereas other data showed a weak impact. Consistently, soil respiration was also found to be strongest at +40%. The CO2 production potential is positively correlated with soil organic carbon, including carbon quantity and quality. But microbial diversity did not show any positive response to precipitation sizes. r-/K-strategy seemed to be a plausible explanation for biological factors. Overall, our finding reveal that a moderate precipitation increase, not decrease or a robust increase, in a saltmarsh is likely to improve soil organic carbon quality and quantity, and bacterial oligotroph:copiotroph ratio, ultimately leading to an enhanced CO2 production.
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Affiliation(s)
- Lirong Zhang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Guangxuan Han
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- Shandong Key Laboratory of Coastal Environmental Processes, Yantai, China
- The Yellow River Delta Ecological Research Station of Coastal Wetland, Chinese Academy of Sciences, Yantai, China
| | - Lifeng Zhou
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- School of Geography and Environment, Liaocheng University, Liaocheng, China
| | - Xinge Li
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- University of Chinese Academy of Sciences, Beijing, China
- The College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Xiaojie Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- Shandong Key Laboratory of Coastal Environmental Processes, Yantai, China
- The Yellow River Delta Ecological Research Station of Coastal Wetland, Chinese Academy of Sciences, Yantai, China
| | - Xiaoshuai Zhang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- Shandong Key Laboratory of Coastal Environmental Processes, Yantai, China
- The Yellow River Delta Ecological Research Station of Coastal Wetland, Chinese Academy of Sciences, Yantai, China
| | - Leilei Xiao
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
- Shandong Key Laboratory of Coastal Environmental Processes, Yantai, China
- The Yellow River Delta Ecological Research Station of Coastal Wetland, Chinese Academy of Sciences, Yantai, China
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Li J, Deng L, Peñuelas J, Wu J, Shangguan Z, Sardans J, Peng C, Kuzyakov Y. C:N:P stoichiometry of plants, soils, and microorganisms: Response to altered precipitation. GLOBAL CHANGE BIOLOGY 2023; 29:7051-7071. [PMID: 37787740 DOI: 10.1111/gcb.16959] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/06/2023] [Accepted: 09/09/2023] [Indexed: 10/04/2023]
Abstract
Precipitation changes modify C, N, and P cycles, which regulate the functions and structure of terrestrial ecosystems. Although altered precipitation affects above- and belowground C:N:P stoichiometry, considerable uncertainties remain regarding plant-microbial nutrient allocation strategies under increased (IPPT) and decreased (DPPT) precipitation. We meta-analyzed 827 observations from 235 field studies to investigate the effects of IPPT and DPPT on the C:N:P stoichiometry of plants, soils, and microorganisms. DPPT reduced leaf C:N ratio, but increased the leaf and root N:P ratios reflecting stronger decrease of P compared with N mobility in soil under drought. IPPT increased microbial biomass C (+13%), N (+15%), P (26%), and the C:N ratio, whereas DPPT decreased microbial biomass N (-12%) and the N:P ratio. The C:N and N:P ratios of plant leaves were more sensitive to medium DPPT than to IPPT because drought increased plant N content, particularly in humid areas. The responses of plant and soil C:N:P stoichiometry to altered precipitation did not fit the double asymmetry model with a positive asymmetry under IPPT and a negative asymmetry under extreme DPPT. Soil microorganisms were more sensitive to IPPT than to DPPT, but they were more sensitive to extreme DPPT than extreme IPPT, consistent with the double asymmetry model. Soil microorganisms maintained stoichiometric homeostasis, whereas N:P ratios of plants follow that of the soils under altered precipitation. In conclusion, specific N allocation strategies of plants and microbial communities as well as N and P availability in soil critically mediate C:N:P stoichiometry by altered precipitation that need to be considered by prediction of ecosystem functions and C cycling under future climate change scenarios.
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Affiliation(s)
- Jiwei Li
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, China
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China
- College of Forestry, Northwest A&F University, Yangling, China
| | - Lei Deng
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, China
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China
- College of Forestry, Northwest A&F University, Yangling, China
| | - Josep Peñuelas
- CREAF, Cerdanyola del Vallès, Barcelona, Spain
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, Barcelona, Spain
| | - Jianzhao Wu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, China
| | - Zhouping Shangguan
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, China
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China
| | - Jordi Sardans
- CREAF, Cerdanyola del Vallès, Barcelona, Spain
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, Barcelona, Spain
| | - Changhui Peng
- Center of CEF/ESCER, Department of Biological Science, University of Quebec at Montreal, Montreal, Quebec, Canada
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, University of Goettingen, Göttingen, Germany
- Department of Agricultural Soil Science, University of Goettingen, Göttingen, Germany
- Peoples Friendship University of Russia (RUDN University), Moscow, Russia
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Xiao S, Wang C, Yu K, Liu G, Wu S, Wang J, Niu S, Zou J, Liu S. Enhanced CO 2 uptake is marginally offset by altered fluxes of non-CO 2 greenhouse gases in global forests and grasslands under N deposition. GLOBAL CHANGE BIOLOGY 2023; 29:5829-5849. [PMID: 37485988 DOI: 10.1111/gcb.16869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/01/2023] [Indexed: 07/25/2023]
Abstract
Despite the increasing impact of atmospheric nitrogen (N) deposition on terrestrial greenhouse gas (GHG) budget, through driving both the net atmospheric CO2 exchange and the emission or uptake of non-CO2 GHGs (CH4 and N2 O), few studies have assessed the climatic impact of forests and grasslands under N deposition globally based on different bottom-up approaches. Here, we quantify the effects of N deposition on biomass C increment, soil organic C (SOC), CH4 and N2 O fluxes and, ultimately, the net ecosystem GHG balance of forests and grasslands using a global comprehensive dataset. We showed that N addition significantly increased plant C uptake (net primary production) in forests and grasslands, to a larger extent for the aboveground C (aboveground net primary production), whereas it only caused a small or insignificant enhancement of SOC pool in both upland systems. Nitrogen addition had no significant effect on soil heterotrophic respiration (RH ) in both forests and grasslands, while a significant N-induced increase in soil CO2 fluxes (RS , soil respiration) was observed in grasslands. Nitrogen addition significantly stimulated soil N2 O fluxes in forests (76%), to a larger extent in grasslands (87%), but showed a consistent trend to decrease soil uptake of CH4 , suggesting a declined sink capacity of forests and grasslands for atmospheric CH4 under N enrichment. Overall, the net GHG balance estimated by the net ecosystem production-based method (forest, 1.28 Pg CO2 -eq year-1 vs. grassland, 0.58 Pg CO2 -eq year-1 ) was greater than those estimated using the SOC-based method (forest, 0.32 Pg CO2 -eq year-1 vs. grassland, 0.18 Pg CO2 -eq year-1 ) caused by N addition. Our findings revealed that the enhanced soil C sequestration by N addition in global forests and grasslands could be only marginally offset (1.5%-4.8%) by the combined effects of its stimulation of N2 O emissions together with the reduced soil uptake of CH4 .
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Affiliation(s)
- Shuqi Xiao
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
| | - Chao Wang
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
| | - Kai Yu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
| | - Genyuan Liu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
| | - Shuang Wu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
- Key Laboratory of Low-carbon and Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Jinyang Wang
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
- Key Laboratory of Low-carbon and Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Shuli Niu
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Jianwen Zou
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
- Key Laboratory of Low-carbon and Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
- Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, China
| | - Shuwei Liu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing, China
- Key Laboratory of Low-carbon and Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
- Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, China
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8
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Williamson M, Ball BA. Soil biogeochemical responses to multiple co-occurring forms of human-induced environmental change. Oecologia 2023; 201:1109-1121. [PMID: 36928931 DOI: 10.1007/s00442-023-05360-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 03/07/2023] [Indexed: 03/18/2023]
Abstract
Human activities cause a multitude of environmental issues, including increased temperatures and altered precipitation patterns associated with climate change, air pollution, and other impacts of urbanization. One area highly affected by these issues is the Sonoran Desert, specifically the Phoenix metropolitan area where urbanization is among the most rapid in the United States. Most studies investigate these multiple environmental change factors independently or sometimes in pairs, but rarely all together as co-occurring forms of change. We examined how the simultaneous manipulation of increasing temperatures, altered precipitation patterns, nitrogen deposition, and urbanization influenced soil respiration and mineral N pools in the Sonoran Desert. Soil was collected from urban and exurban sites, from both nitrogen-fertilized and control plots. To simulate projected climate change, the soils were incubated in microcosm at the annual average Phoenix temperature as well a 2 ℃ increase under a factorial precipitation treatment of decreased frequency and increased pulse size. Our results show that C and N dynamics were altered by all four forms of environmental change. However, the dominance of significant 3- and 4-way interactions among the four environmental factors for both respiration and mineral N pools demonstrates that the impact of any given form of environmental change will depend on the levels of the other environmental factors. In other words, the cumulative effect of altered precipitation, fertilization, temperature, and urbanization on soil biogeochemical processes is not necessarily predictable from their individual impact.
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Affiliation(s)
- Maya Williamson
- School of Mathematical and Natural Sciences, Arizona State University at the West Campus, 1407 W. Thunderbird Rd., Glendale, AZ, 85306, USA
| | - Becky A Ball
- School of Mathematical and Natural Sciences, Arizona State University at the West Campus, 1407 W. Thunderbird Rd., Glendale, AZ, 85306, USA.
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Du Y, Wang YP, Hui D, Su F, Yan J. Significant effects of precipitation frequency on soil respiration and its components-A global synthesis. GLOBAL CHANGE BIOLOGY 2023; 29:1188-1205. [PMID: 36408676 DOI: 10.1111/gcb.16532] [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: 06/16/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Global warming intensifies the hydrological cycle, which results in changes in precipitation regime (frequency and amount), and will likely have significant impacts on soil respiration (Rs ). Although the responses of Rs to changes in precipitation amount have been extensively studied, there is little consensus on how Rs will be affected by changes in precipitation frequency (PF) across the globe. Here, we synthesized the field observations from 296 published papers to quantify the effects of PF on Rs and its components using meta-analysis. Our results indicated that the effects of PF on Rs decreased with an increase in background mean annual precipitation. When the data were grouped by climate conditions, increased PF showed positive effects on Rs under the arid condition but not under the semi-humid or humid conditions, whereas decreased PF suppressed Rs across all the climate conditions. The positive effects of increased PF mainly resulted from the positive response of heterotrophic respiration under the arid condition while the negative effects of decreased PF were mainly attributed to the reductions in root biomass and respiration. Overall, our global synthesis provided for the first time a comprehensive analysis of the divergent effects of PF on Rs and its components across climate regions. This study also provided a framework for understanding and modeling responses of ecosystem carbon cycling to global precipitation change.
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Affiliation(s)
- Yue Du
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- College of Geography and Environmental Science, Henan University, Kaifeng, China
| | - Ying-Ping Wang
- CSIRO Oceans and Atmosphere, Aspendale, Victoria, Australia
| | - Dafeng Hui
- Department of Biological Sciences, Tennessee State University, Nashville, Tennessee, USA
| | - Fanglong Su
- School of Life Sciences, Henan University, Kaifeng, China
| | - Junhua Yan
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
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10
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Yu J, Zhang Y, Wang Y, Luo X, Liang X, Huang X, Zhao Y, Zhou X, Li J. Ecosystem photosynthesis depends on increased water availability to enhance carbon assimilation in semiarid desert steppe in northern China. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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11
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Bai Y, Nan L, Wang Q, Wang W, Hai J, Yu X, Cao Q, Huang J, Zhang R, Han Y, Yang M, Yang G. Soil Respiration of Paddy Soils Were Stimulated by Semiconductor Minerals. FRONTIERS IN PLANT SCIENCE 2022; 13:941144. [PMID: 35832219 PMCID: PMC9271915 DOI: 10.3389/fpls.2022.941144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Large quantities of semiconductor minerals on soil surfaces have a sensitive photoelectric response. These semiconductor minerals generate photo-electrons and photo-hole pairs that can stimulate soil oxidation-reduction reactions when exposed to sunlight. We speculated that the photocatalysis of semiconductor minerals would affect soil carbon cycles. As the main component of the carbon cycle, soil respiration from paddy soil is often ignored. Five rice cropping areas in China were chosen for soil sampling. Semiconductor minerals were measured, and three main semiconductor minerals including hematile, rutile, and manganosite were identified in the paddy soils. The identified semiconductor minerals consisted of iron, manganese, and titanium oxides. Content of Fe2O3, TiO2, and MnO in the sampled soil was between 4.21-14%, 0.91-2.72%, and 0.02-0.22%, respectively. Most abundant semiconductor mineral was found in the DBDJ rice cropping area in Jilin province, with the highest content of Fe2O3 of 14%. Soils from the five main rice cropping areas were also identified as having strong photoelectric response characteristics. The highest photoelectric response was found in the DBDJ rice cropping area in Jilin province with a maximum photocurrent density of 0.48 μA/cm2. Soil respiration was monitored under both dark and light (3,000 lux light density) conditions. Soil respiration rates in the five regions were (from highest to lowest): DBDJ > XNDJ > XBDJ > HZSJ > HNSJ. Soil respiration was positively correlated with semiconductor mineral content, and soil respiration was higher under the light treatment than the dark treatment in every rice cropping area. This result suggested that soil respiration was stimulated by semiconductor mineral photocatalysis. This analysis provided indirect evidence of the effect semiconductor mineral photocatalysis has on the carbon cycle within paddy soils, while exploring carbon conversion mechanisms that could provide a new perspective on the soil carbon cycle.
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Affiliation(s)
- Yinping Bai
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Ling Nan
- School of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, China
| | - Qing Wang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Weiqi Wang
- Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Jiangbo Hai
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Xiaoya Yu
- School of Tourism and Resources Environment, Qiannan Normal University for Nationalities, Duyun, China
| | - Qin Cao
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Jing Huang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Rongping Zhang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
| | - Yunwei Han
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
| | - Min Yang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China
| | - Gang Yang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, China
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12
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Components of respiration and their temperature sensitivity in four reconstructed soils. Sci Rep 2022; 12:6107. [PMID: 35414640 PMCID: PMC9005528 DOI: 10.1038/s41598-022-09918-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/30/2022] [Indexed: 11/08/2022] Open
Abstract
Seasonal changes characteristics in the respiration of four reconstructed soil masses in a barren gravel land were monitored. The results showed that (1) Respiration and heterotrophic respiration of the four reconstructed soils with added meteorite, shale, sand increased gradually with increasing soil temperatures, reaching its maximum in summer and decreasing to its minimum in winter. the average annual respiration of reconstructed soil with sand was 4.87 μmol·m–2·s–1, which was significantly higher than the other reconstructed soils (p < 0.05). (2) The maximum and minimum values of autotrophic respiration for the four reconstructed soils appeared in August 2018 and January 2018, respectively. the proportion of autotrophic respiration to total respiration was 12.5–38.0%, 9.5–42.0%, 7.7–41.2%, and 5.0–39.3% for the soils with reconstituted meteorite, shale, sand, and soft rock, respectively. (3) The relationship between respiration and the temperature of reconstructed soils can be represented by an exponential function. The 90% to 93% changes in reconstructed soils respiration were caused by soil temperature. The temperature sensitivity (Q10) of reconstituted soil with added sand was significantly higher than that of the other three reconstituted soils.
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Li X, Yan Y, Fu L. Effects of Rainfall Manipulation on Ecosystem Respiration and Soil Respiration in an Alpine Steppe in Northern Tibet Plateau. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.708761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The response mechanism of ecosystem respiration (Re) and soil respiration (Rs) to different water conditions is of great significance for understanding the carbon cycle under future changes in the precipitation patterns. We used seven precipitation treatments to investigate the effects of precipitation on Re and Rs on a typical alpine steppe in Northern Tibet. Precipitation was captured and relocated to simulate the precipitation rates of −25, −50, −75, 0 (CK), +25, +50, and +75%. The soil moisture was influenced by all the precipitation treatments. There was a positive linear relationship between the soil moisture and Re, Rs in the study area during the experiment (July–October). Soil volumetric water content (VWC), absolute water content (AWC), soil temperature (ST), aboveground biomass (AGB), bulk density, soil total nitrogen (TN), and alkaline hydrolysis nitrogen (AHN) were the predictors of Re and Rs. The multiple linear regression analysis showed that ST and AWC could explain 90.6% of Rs, and ST, AWC, and AHN could explain 89.4% of Re. Ecosystem respiration was more sensitive to the increased precipitation (+29.5%) whereas Rs was more sensitive to the decreased precipitation (−23.8%). An appropriate increase in water (+25 and +50%) could improve the Re and Rs, but a greater increase (+75%) would not have a significant effect; it could have an effect even lower than those of the first two. Our study highlights the importance of increased precipitation and the disadvantage of decreased precipitation on Re and Rs in an arid region. The precipitation changes will lead to significant changes in the soil properties and AGB, and affect Re and Rs, to change the climate of the alpine steppe in Northern Tibet in the future. These findings contribute to our understanding of the regional patterns of environmental C exchange and soil C flux under the climate change scenarios and highlight the importance of water availability to the regulating ecosystem processes in semi-arid steppe ecosystems. In view of these findings, we urge future researchers to focus on manipulating the precipitation over longer time scales, seasonality, and incorporating more environmental factors to improve our ability to predict and model Re and Rs and feedback from climate change.
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Du K, Li F, Qiao Y, Leng P, Li Z, Ge J, Yang G. Influence of no-tillage and precipitation pulse on continuous soil respiration of summer maize affected by soil water in the North China Plain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 766:144384. [PMID: 33421780 DOI: 10.1016/j.scitotenv.2020.144384] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/30/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Soil respiration (RS) from cropland in response to tillage practices contribute to global climate change. We quantified the effect of no-tillage (NT) and conventional tillage (CT) on RS and precipitation in the North China Plain (NCP). An in-situ automatic sampling and measurement method was applied during the maize (Zea mays L.) growth stages in 2018 and 2019. The continuous daily RS, soil water content and temperature were monitored during all the maize growth stages, whereas maize grain yield, aboveground biomass, and soil microbial biomass were measured after harvest. The mean RS across tillage practices on bright days was higher in 2018 (16.69 g CO2 m-2 d-1) than that in 2019 (12.99 g CO2 m-2 d-1). Compared with CT, NT increased RS on bright days by 31.44% in 2018 and 15.60% in 2019. However, mean RS on rain-affected days across tillage practices was lower in 2018 than that in 2019. NT increased mean RS after precipitation in 2018 (p < 0.05). The contribution of RS after precipitation to cumulative RS (across tillage practices) was higher in 2019 (51.90%) than that in 2018 (41.18%). Mean soil water content and temperature were higher in 2018 than that in 2019 (p < 0.05). NT increased soil water content on bright days in 2019. Furthermore, soil water content was more important in regulating RS in 2018, while soil temperature was more critical after precipitation in 2019. Crop productivity was lower in 2019 than in 2018 (p < 0.05). However, neither crop productivity nor soil microbial biomass varied with tillage practices (p > 0.05). Overall, influence of tillage practices and precipitation on RS were different according to soil water content. Therefore, it is necessary to decrease excessive irrigation to reduce RS in dry years and to conduct continuous observations on RS after precipitation in the NCP.
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Affiliation(s)
- Kun Du
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Yucheng Shandong Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng 251200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fadong Li
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Yucheng Shandong Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng 251200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yunfeng Qiao
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Yucheng Shandong Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng 251200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peifang Leng
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Yucheng Shandong Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng 251200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhao Li
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Yucheng Shandong Agro-ecosystem National Observation and Research Station, Ministry of Science and Technology, Yucheng 251200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianping Ge
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Ministry of Education Key Laboratory for Biodiversity Science and Engineering & College of Life Sciences, Beijing Normal University, Beijing 100875, China
| | - Guang Yang
- College of Water and Architectural Engineering, Shihezi University, Shihezi 832000, China
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15
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Pang L, Song F, Song X, Guo X, Lu Y, Chen S, Zhu F, Zhang N, Zou J, Zhang P. Effects of different types of humic acid isolated from coal on soil NH 3 volatilization and CO 2 emissions. ENVIRONMENTAL RESEARCH 2021; 194:110711. [PMID: 33450237 DOI: 10.1016/j.envres.2021.110711] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 12/25/2020] [Accepted: 01/01/2021] [Indexed: 06/12/2023]
Abstract
Humic acid can improve soil nutrients and promote plant growth. Weathered coal and lignite can be used as agricultural resources due to high humic acid content, but their impact on soil NH3 volatilization and CO2 emissions are yet to be determined. In this study, a field experiment was carried out to compare the effects of four types of humic acid isolated from coal (pulverized weathered coal (HC), pulverized lignite (HL), alkalized weathered coal (AC) and alkalized lignite (AL)) on NH3 volatilization, CO2 emissions, pH, the C/N ratio and enzyme activities in soil cultivated with maize. The effect of biotechnology humic acids (BHA) was also examined for comparison. HL, AC, AL and BHA all increased cumulative NH3 losses by 147.7, 278.5, 113.9, and 355.3%, respectively, compared with the control (chemical fertilizer only), and notably, BHA caused an increase of 90.71% compared with the humic acids isolated from coal. A significant increase in cumulative CO2 losses was observed only under AL treatment, by 14.44-24.90% compared with all other treatments. Soil urease activity was positively correlated with cumulative NH3 losses (P < 0.001), while the soil C/N ratio (P < 0.001) and soil sucrase activity (P < 0.05) were positively correlated with cumulative CO2 losses. Since humic acid from pulverized weathered coal caused no increase in NH3 volatilization or CO2 emissions, it is therefore thought to be the most suitable humic acid for field application.
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Affiliation(s)
- Liuying Pang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Fupeng Song
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China.
| | - Xiliang Song
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Xinsong Guo
- Engineering Technology Research Center of Shandong Province for Efficient Utilization of Humic Acid, Shandong Agricultural University Fertilizer Science and Technology Co. Ltd., Feicheng, Shandong, 271600, China.
| | - Yanyan Lu
- Department of Soil and Water Sciences, Range Cattle Research and Education Center, University of Florida, Ona, FL, 33865, USA
| | - Shigeng Chen
- Engineering Technology Research Center of Shandong Province for Efficient Utilization of Humic Acid, Shandong Agricultural University Fertilizer Science and Technology Co. Ltd., Feicheng, Shandong, 271600, China
| | - Fujun Zhu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China; Engineering Technology Research Center of Shandong Province for Efficient Utilization of Humic Acid, Shandong Agricultural University Fertilizer Science and Technology Co. Ltd., Feicheng, Shandong, 271600, China
| | - Naidan Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Jiacheng Zou
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Penghui Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an, Shandong, 271018, China
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16
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Hu Z, Chen C, Chen X, Yao J, Jiang L, Liu M. Home-field advantage in soil respiration and its resilience to drying and rewetting cycles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 750:141736. [PMID: 32871374 DOI: 10.1016/j.scitotenv.2020.141736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 08/14/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
Climate change is expected to increase extreme weather events, such as more extreme drought and rainfall incidences, with consequences for ecosystem carbon (C) cycling. An understanding of how drying and rewetting (DRW) events affect microbe-mediated soil processes is therefore critical to the predictions of future climate. Here, a reciprocal-transplant experiment was conducted using two soils originated from distinct climate and agricultural managements to evaluate how soil biotic and abiotic properties regulate soil respiration and its resilience to simulated DRW cycles. We found that regardless of the DRW intensity, the effects of microbial community on soil respiration and its resilience to DRW cycles were dependent on soil type. Soil microbial communities yielded higher respiration rates and resilience in native than foreign soils under both one and four DRW cycles, supporting the "home-field advantage" hypothesis. Structural equation modeling demonstrated that soil pH and total C directly influenced soil respiration, but effects of soil abiotic properties on respiration resilience were mediated by microbial communities. Among microbial drivers, the microbial C utilization capacity (as characterized by community-level physiological profile, C-acquisition enzyme activities and microbial metabolic quotients) was the best predictor of respiration resilience to DRW cycles, followed by microbial biomass carbon/nitrogen ratio and microbial community composition. Our study suggests that soil microbial communities may have adapted to their historical conditions, which facilitates the resilience of soil respiration to changing environments, but this adaptation may accelerate C loss from soils facing increasingly variable climate.
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Affiliation(s)
- Zhengkun Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210014, China; School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Chenying Chen
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu 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 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 Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210014, China
| | - Lin Jiang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Manqiang Liu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210014, China.
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17
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Zhao X, Li Y, Xie Z, Li P. Effects of nitrogen deposition and plant litter alteration on soil respiration in a semiarid grassland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 740:139634. [PMID: 32559551 DOI: 10.1016/j.scitotenv.2020.139634] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/17/2020] [Accepted: 05/21/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen (N) deposition and the input of litter to soils are expected to significantly affect soil respiration (Rs). However, the responses of Rs to N deposition and litter input alteration in semiarid grassland are still unclear. We investigated the effects of N addition, litter input alteration, and their interactions on Rs throughout the growing season from May to September in 2017, in Horqin grassland, Northern China. N deposition included N addition (10 g N m-2 year-1) and N control (0 g N m-2 year-1), and litter alteration consisting of litter removal, litter doubling and litter control were conducted. We found that N addition significantly improved vegetation coverage (P < 0.01) and thus increased root respiration (Rt) by 30% (P < 0.05), but did not significantly enhance Rs (P > 0.05) due to the negative effect of microbial respiration (Rm). Litter removal significantly decreased soil microbial biomass and thus reduced Rm (13%) and Rs (14%), but litter doubling did not significantly alter Rm, Rt and Rs. N addition slightly weakened the inhibition of litter removal and led to soil respiration was not significantly decreased, whereas N addition and litter doubling did not significantly interact with Rs. Furthermore, Rs and its components were mainly mediated by soil temperature, moisture, soil microbial biomass carbon (SMBC) and vegetation coverage, but the structural equation model found that soil temperature, SMBC and coverage were the key controlling factor of Rs, Rm and Rt, respectively. Different influences of N deposition and litter input on Rs, as well as the contributions of Rm and Rt to Rs identified could facilitate the evaluation and prediction of Rs and belowground C storage in grassland ecosystems in the context of future global changes.
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Affiliation(s)
- Xinxin Zhao
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Yulin Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
| | - Zuoming Xie
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Ping Li
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
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