1
|
Weng X, Wang M, Sui X, Frey B, Liu Y, Zhang R, Ni H, Li M. High Ammonium Addition Changes the Diversity and Structure of Bacterial Communities in Temperate Wetland Soils of Northeastern China. Microorganisms 2023; 11:2033. [PMID: 37630593 PMCID: PMC10459003 DOI: 10.3390/microorganisms11082033] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/05/2023] [Accepted: 08/06/2023] [Indexed: 08/27/2023] Open
Abstract
The soil microbiome is an important component of wetland ecosystems and plays a pivotal role in nutrient cycling and climate regulation. Nitrogen (N) addition influences the soil's microbial diversity, composition, and function by affecting the soil's nutrient status. The change in soil bacterial diversity and composition in temperate wetland ecosystems in response to high ammonium nitrogen additions remains unclear. In this study, we used high-throughput sequencing technology to study the changes of soil bacterial diversity and community structure with increasing ammonium concentrations [CK (control, 0 kg ha-1 a-1), LN (low nitrogen addition, 40 kg ha-1 a-1), and HN (high nitrogen addition, 80 kg ha-1 a-1)] at a field experimental site in the Sanjiang Plain wetland, China. Our results showed that except for soil organic carbon (SOC), other soil physicochemical parameters, i.e., soil moisture content (SMC), dissolved organic nitrogen (DON), total nitrogen (TN), pH, ammonium nitrogen (NH4+), and dissolved organic carbon (DOC), changed significantly among three ammonium nitrogen addition concentrations (p < 0.05). Compared to CK, LN did not change soil bacterial α-diversity (p > 0.05), and HN only decreased the Shannon (p < 0.05) and did not change the Chao (p > 0.05) indices of soil bacterial community. Ammonium nitrogen addition did not significantly affect the soil's bacterial community structure based on non-metric multidimensional scaling (NMDS) and PERMANOVA (ADONIS) analyses. Acidobacteriota (24.96-31.11%), Proteobacteria (16.82-26.78%), Chloroflexi (10.34-18.09%), Verrucomicrobiota (5.23-11.56%), and Actinobacteriota (5.63-8.75%) were the most abundant bacterial phyla in the soils. Nitrogen addition changed the complexity and stability of the bacterial network. SMC, NO3-, and pH were the main drivers of the bacterial community structure. These findings indicate that enhanced atmospheric nitrogen addition may have an impact on bacterial communities in soil, and this study will allow us to better understand the response of the soil microbiome in wetland ecosystems in the framework of increasing nitrogen deposition.
Collapse
Affiliation(s)
- Xiaohong Weng
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (X.W.); (M.W.)
| | - Mingyu Wang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (X.W.); (M.W.)
| | - Xin Sui
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (X.W.); (M.W.)
| | - Beat Frey
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, Switzerland;
| | - Yingnan Liu
- Institute of Nature and Ecology, Heilongjiang Academy of Sciences, Harbin 150001, China; (Y.L.); (R.Z.)
| | - Rongtao Zhang
- Institute of Nature and Ecology, Heilongjiang Academy of Sciences, Harbin 150001, China; (Y.L.); (R.Z.)
| | - Hongwei Ni
- Heilongjiang Academy of Forestry, Harbin 150022, China;
| | - Maihe Li
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, Switzerland;
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
- School of Life Science, Hebei University, Baoding 071002, China
| |
Collapse
|
2
|
Li C, Fan M, Wang X, Li X, Zhao G, Liu G, Zhao J. Effects of nitrogen fertilizers on the bacterial community diversity and the weathering of purple mudstone in Southwest China. Front Microbiol 2023; 14:1164826. [PMID: 37455726 PMCID: PMC10341161 DOI: 10.3389/fmicb.2023.1164826] [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: 02/13/2023] [Accepted: 06/05/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction Rock weathering is crucial in the development of soil. Yet the role of bacteria in the fine particle-forming process of purple mudstone is not fully understood, especially under nitrogen fertilization. Methods In this study, the particles (0.25 mm to 1 mm) of purple mudstone from Penglai Group (J3p) were selected as the test material. Two nitrogen fertilizers, i.e., urea (U) and ammonium bicarbonate (AB), and four application levels (0, 280, 560, and 840 N kg∙ha-1) with 18 replications were designed in an incubation experiment. The weathering indices and bacterial community structure of the purple mudstone particles were investigated after 120 days of incubation. Results The results showed that the weathering indices of purple mudstone particles in the AB treatment were higher than that in the U treatment at the same fertilization levels and a reducing trend was observed with increasing nitrogen fertilizer levels under the same nitrogen fertilizer application types. The diversities of the bacterial community were extremely significantly altered by nitrogen fertilizer application (p < 0.01). The effect of the nitrogen fertilizer application level on the beta diversity of the bacterial community (R2 = 0.34) was greater than that of the nitrogen fertilizer application type (R2 = 0.20). Through stepwise regression analysis, the positive effects of nitrification of Nitrobacter (Nitrolancea) (R2 = 0.36), the Phosphorous-dissolving bacteria (Massilia) (R2 = 0.12), and N-NO3- (R2 = 0.35) on the weathering indices of J3p purple mudstone particles could be observed. Structural equation modelling indicated that nitrogen fertilizer application level affects the abundance of the dominant species at the genus level (Nitrolancea and Massilia), and key environmental factor (N-NO3-), which in turn accelerated the weathering indices (59%). Discussion and Conclusion Our findings imply that the enhancements of nitrification of Nitrobacter (Nitrolancea) and of phosphorus solubilization of Phosphorous-dissolving bacteria (Massilia) by nitrogen fertilization are the key factors affecting the weathering indices of J3p purple mudstone particles.
Collapse
Affiliation(s)
- Chunpei Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming, China
| | - Maopan Fan
- College of Resources and Environment, Yunnan Agricultural University, Kunming, China
| | - Xuan Wang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, and Ministry of Water Conservancy, Chengdu, China
- University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Xue Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming, China
| | - Guang Zhao
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Gangcai Liu
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, and Ministry of Water Conservancy, Chengdu, China
| | - Jixia Zhao
- College of Resources and Environment, Yunnan Agricultural University, Kunming, China
| |
Collapse
|
3
|
Chen Y, Yin S, Shao Y, Zhang K. Soil bacteria are more sensitive than fungi in response to nitrogen and phosphorus enrichment. Front Microbiol 2022; 13:999385. [PMID: 36212871 PMCID: PMC9537584 DOI: 10.3389/fmicb.2022.999385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/30/2022] [Indexed: 11/28/2022] Open
Abstract
Anthropogenic activities have dramatically increased nitrogen (N) and phosphorous (P) enrichments in terrestrial ecosystems. However, it is still unclear on how bacterial and fungal communities would respond to the simultaneously increased N and P enrichment. In this study, we used a field experiment to simulate N and P input, and examined the effects of N and P additions on the abundance, alpha-diversity, and community composition of soil bacteria and fungi in a riparian forest. Six nutrient-addition treatments, including low N (30 kg N ha–1 year–1), high N (150 kg N ha –1 year–1), low P (30 kg P2O5 ha–1 year–1), high P (150 kg P2O5 ha –1 year–1), low N+P, high N+P, and a control (CK) treatment were set up. We found that the N and P additions significantly affected bacterial abundance, community composition, but not the alpha diversity. Specifically, 16S, nirK, and nirS gene copy numbers were significantly reduced after N and P additions, which were correlated with decreases in soil pH and NO-3-N, respectively; Co-additions of N and P showed significantly antagonistic interactions on bacterial gene copies; Nutrient additions significantly increased the relative abundance of Proteobacteria while reduced the relative abundance of Chloroflexi. Mantel’s test showed that the alteration in bacterial composition was associated with the changes in soil pH and NO-3-N. The nutrient additions did not show significant effects on fungal gene copy numbers, alpha diversity, and community composition, which could be due to non-significant alterations in soil C/N and total P concentration. In conclusion, our results suggest that soil bacteria are more sensitive than fungi in response to N and P enrichment; the alterations in soil pH and NO-3-N explain the effects of N and P enrichment on bacterial communities, respectively; and the co-addition of N and P reduces the negative effects of these two nutrients addition in alone. These findings improve our understanding of microbial response to N and P addition, especially in the context of simultaneous enrichment of anthropogenic nutrient inputs.
Collapse
Affiliation(s)
- Youchao Chen
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Shuwei Yin
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Yun Shao
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Kerong Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- *Correspondence: Kerong Zhang,
| |
Collapse
|
4
|
Liu Y, Tan X, Fu S, Shen W. Canopy and Understory Nitrogen Addition Alters Organic Soil Bacterial Communities but Not Fungal Communities in a Temperate Forest. Front Microbiol 2022; 13:888121. [PMID: 35756006 PMCID: PMC9226683 DOI: 10.3389/fmicb.2022.888121] [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: 03/02/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
Atmospheric nitrogen (N) deposition is known to alter soil microbial communities, but how canopy and understory N addition affects soil bacterial and fungal communities in different soil layers remains poorly understood. Conducting a 6-year canopy and understory N addition experiment in a temperate forest, we showed that soil bacterial and fungal communities in the organic layer exhibited different responses to N addition. The main effect of N addition decreased soil bacterial diversity and altered bacterial community composition in the organic layer, but not changed fungal diversity and community composition in all layers. Soil pH was the main factor that regulated the responses of soil bacterial diversity and community composition to N addition, whereas soil fungal diversity and community composition were mainly controlled by soil moisture and nutrient availability. In addition, compared with canopy N addition, the understory N addition had stronger effects on soil bacterial Shannon diversity and community composition but had a weaker effect on soil bacteria richness in the organic soil layer. Our study demonstrates that the bacterial communities in the organic soil layer were more sensitive than the fungal communities to canopy and understory N addition, and the conventional method of understory N addition might have skewed the effects of natural atmospheric N deposition on soil bacterial communities. This further emphasizes the importance of considering canopy processes in future N addition studies and simultaneously evaluating soil bacterial and fungal communities in response to global environmental changes.
Collapse
Affiliation(s)
- Yang Liu
- Ecological Conservation and Restoration Laboratory of Qinghai-Tibetan Plateau, Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China.,Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Xiangping Tan
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Shenglei Fu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, College of Environment and Planning, Henan University, Kaifeng, China
| | - Weijun Shen
- Guangxi Key Laboratory of Forest Ecology and Conservation, State Key Laboratory for Conservation and Utilization of Agro-Bioresources, College of Forestry, Guangxi University, Nanning, China
| |
Collapse
|
5
|
Xia Z, Yang J, Sang C, Wang X, Sun L, Jiang P, Wang C, Bai E. Phosphorus Reduces Negative Effects of Nitrogen Addition on Soil Microbial Communities and Functions. Microorganisms 2020; 8:E1828. [PMID: 33233486 PMCID: PMC7699539 DOI: 10.3390/microorganisms8111828] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/10/2020] [Accepted: 11/17/2020] [Indexed: 01/21/2023] Open
Abstract
Increased soil nitrogen (N) from atmospheric N deposition could change microbial communities and functions. However, the underlying mechanisms and whether soil phosphorus (P) status are responsible for these changes still have not been well explained. Here, we investigated the effects of N and P additions on soil bacterial and fungal communities and predicted their functional compositions in a temperate forest. We found that N addition significantly decreased soil bacterial diversity in the organic (O) horizon, but tended to increase bacterial diversity in the mineral (A) horizon soil. P addition alone did not significantly change soil bacterial diversity but mitigated the negative effect of N addition on bacterial diversity in the O horizon. Neither N addition nor P addition significantly influenced soil fungal diversity. Changes in soil microbial community composition under N and P additions were mainly due to the shifts in soil pH and NO3- contents. N addition can affect bacterial functional potentials, such as ureolysis, N fixation, respiration, decomposition of organic matter processes, and fungal guilds, such as pathogen, saprotroph, and mycorrhizal fungi, by which more C probably was lost in O horizon soil under increased N deposition. However, P addition can alleviate or switch the effects of increased N deposition on the microbial functional potentials in O horizon soil and may even be a benefit for more C sequestration in A horizon soil. Our results highlight the different responses of microorganisms to N and P additions between O and A horizons and provides an important insight for predicting the changes in forest C storage status under increasing N deposition in the future.
Collapse
Affiliation(s)
- Zongwei Xia
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
| | - Jingyi Yang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changpeng Sang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lifei Sun
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
| | - Ping Jiang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
| | - Chao Wang
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
| | - Edith Bai
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; (Z.X.); (J.Y.); (C.S.); (X.W.); (L.S.); (P.J.); (E.B.)
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
6
|
Influence of Acacia mangium on Soil Fertility and Bacterial Community in Eucalyptus Plantations in the Congolese Coastal Plains. SUSTAINABILITY 2020. [DOI: 10.3390/su12218763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Productivity and sustainability of tropical forest plantations greatly rely on regulation of ecosystem functioning and nutrient cycling, i.e., the link between plant growth, nutrient availability, and the microbial community structure. So far, these interactions have never been evaluated in the Acacia and Eucalyptus forest planted on infertile soils in the Congolese coastal plains. In the present work, the soil bacterial community has been investigated by metabarcoding of the 16S rRNA bacterial gene in different stands of monoculture and mixed-species plantation to evaluate the potential of nitrogen-fixing trees on nutrient and bacterial structure. At the phylum level, the soil bacterial community was dominated by Actinobacteria, followed by Proteobacteria, Firmicutes, and Acidobacteria. A principal coordinate analysis revealed that bacterial communities from pure Eucalyptus, compared to those from plantations containing Acacia in pure and mixed-species stands, showed different community composition (beta-diversity). Regardless of the large variability of the studied soils, the prevalence of Firmicutes phylum, and lower bacterial richness and phylogenic diversity were reported in stands containing Acacia relative to the pure Eucalyptus. Distance-based redundancy analysis revealed a positive correlation of available phosphorus (P) and carbon/nitrogen (C/N) ratio with bacterial community structure. However, the Spearman correlation test revealed a broad correlation between the relative abundance of bacterial taxa and soil attributes, in particular with sulfur (S) and carbon (C), suggesting the important role of soil bacterial community in nutrient cycling in this type of forest management. Concerning mixed plantations, a shift in bacterial community structure was observed, probably linked to other changes, i.e., improvement in soil fertility (enhanced P and C dynamics in forest floor and soil, and increase in soil N status), and C sequestration in both soil and stand wood biomass with the great potential impact to mitigate climate change. Overall, our findings highlight the role of soil attributes, especially C, S, available P, and C/N ratio at a lesser extent, in driving the soil bacterial community in mixed-species plantations and its potential to improve soil fertility and to sustain Eucalyptus plantations established on the infertile and sandy soils of the Congolese coastal plains.
Collapse
|
7
|
Ding B, Luo W, Qin Y, Li Z. Effects of the addition of nitrogen and phosphorus on anaerobic ammonium oxidation coupled with iron reduction (Feammox) in the farmland soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 737:139849. [PMID: 32526563 DOI: 10.1016/j.scitotenv.2020.139849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/29/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Anaerobic ammonium oxidation coupled with iron reduction is termed as Feammox, and is a new nitrogen removal process. However, there is a paucity of studies on the response of nutrient additions on Feammox process in farmland ecosystems. In this study, we investigated the shifts of Feammox and iron-reducers under nitrogen (N) and phosphorus (P) applications via isotopic tracing and high-throughput sequencing technology. In the isotopic tracing experiment, Feammox rates was significantly greater in the N and/or P applications soil (0.184-0.239 μg N g-1 day-1) than in the no fertilizer soil (0.172 μg N g-1 day-1). The results indicated that N and P applications could favor the Feammox reaction. Molecular analysis showed that five predominant iron-reducing bacteria, including Geobacter, Anaeromyxobacter, Pseudomonas, Thiobacillus and Bacillus, were detected. Their abundance in the soil with no fertilizer, N, P and N combined with P was 0.93%, 1.11%-1.71%, 0.99%, and 1.40%-1.75%, respectively. This implied that iron-reducing bacteria can be stimulated under N and P applications. Overall, the results of this study demonstrated that N and/or P applications could alter the activity of Feammox, and modulate the potential of IRB in the farmland soils.
Collapse
Affiliation(s)
- Bangjing Ding
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Wenqi Luo
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yunbin Qin
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhengkui Li
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China.
| |
Collapse
|