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Jia W, Deng Z, Papini MP, Cheng L, Jin N, Zhang D, Li Z, Zhang D, Zhu Y, Ding A. Long-term response mechanism of bacterial communities to chemical oxidation remediation in petroleum hydrocarbon contaminated groundwater. JOURNAL OF HAZARDOUS MATERIALS 2025; 488:137239. [PMID: 39879773 DOI: 10.1016/j.jhazmat.2025.137239] [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: 10/10/2024] [Revised: 12/22/2024] [Accepted: 01/14/2025] [Indexed: 01/31/2025]
Abstract
The limited understanding of microbial response mechanism remains as a bottleneck to evaluate the long-term remediation effectiveness of in situ chemical oxidation in contaminated groundwater. In this study, we investigated long-term response of bacterial communities throughout five remediation stages of pre-oxidation, early-oxidation, late-oxidation, early-recovery and late-recovery. By analyzing bacterial biomass, taxa, diversity and metabolic functions, this work identified the consistently suppressed glyceraldehyde-3-phosphate dehydrogenase pathway and the enrichment of naphthalene degradation pathways for secondary products, suggesting persistent oxidation stress and enhanced microbial utilization of lower-molecular weight carbon sources at the oxidation and early-recovery stages. The dominant microbial clusters shifted from r-strategists to K-strategists and then back to r-strategists, indicating their higher degradation efficiency of petroleum hydrocarbons throughout the oxidation process. The changes in stability and stochastic assembly of bacterial communities during in situ chemical oxidation suggested that oxidative stress, carbon source addition and carbon source limitation as the main influential factors of bacterial community succession at the oxidation, early-recovery and late-recovery stage, respectively. Our findings highlighted the complex recovery and underlying mechanisms of groundwater bacterial communities during in situ chemical oxidation process, and provided valuable insights for effective and long-term site management after in situ chemical oxidation practices.
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Affiliation(s)
- Wenjuan Jia
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | - Zhimao Deng
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | | | - Lirong Cheng
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | - Naifu Jin
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | - Dan Zhang
- Beijing Key Laboratory for Risk Modeling and Remediation of Contaminated Sites, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, PR China; National Engineering Research Centre for Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, PR China
| | - Zhengyan Li
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China
| | - Dayi Zhang
- Key Laboratory of Groundwater Resources and Environment Ministry of Education, Jilin University, Changchun 130021, PR China; College of New Energy and Environment, Jilin University, Changchun 130021, PR China.
| | - Yi Zhu
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China.
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing Normal University, Beijing 100875, PR China.
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Wu M, Zhang W, Wang H, Ding Y, Yu F, Shang J, Tong J, Li Y. How hydrodynamic conditions drive the regime shift towards a bacterial state with lower carbon emissions in river bends. ENVIRONMENTAL RESEARCH 2025; 268:120832. [PMID: 39800304 DOI: 10.1016/j.envres.2025.120832] [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: 10/28/2024] [Revised: 01/09/2025] [Accepted: 01/10/2025] [Indexed: 01/18/2025]
Abstract
Hydrodynamic conditions influenced by river sinuosity may alter carbon (e.g., carbon dioxide and methane) emissions and microbial communities responsible for nutrient turnover. However, knowledge is lacking for the linkage between carbon emission and bacterial community in disturbed environments caused by river sinuosity. Here, the alternative states of benthic bacterial communities under the hydrodynamic conditions in river bends and the feedback to carbon emissions were investigated for the first time through the experiment of channels with different sinuosity combining hydrodynamic profiling, high-throughput sequencing and ecological theory. In this study, bimodal distributions combined with potential analysis showed direct evidence of bistability and demonstrated that increasing hydrodynamic conditions over a threshold (i.e., bottom velocity >0.73 cm s-1, turbulence kinetic energy >0.029 cm2 s-2) lead to a transition in benthic bacterial communities. Bacterial communities in high hydrodynamics (sinuosity of 1.4 and 2.2) exhibited lower carbon emissions (with averaged CH4 decreasing 0.04 μmol L-1 and averaged CO2 decreasing 2.48 μmol L-1). The bacterial communities in the high hydrodynamic group had higher α-diversity and more stable network structure based on topological properties of co-occurrence networks than in the low hydrodynamics. Homogeneous selection belonging to deterministic processes affected more on community assemblages of bacteria under conditions with both low hydrodynamics and high hydrodynamics, and a larger effect of deterministic processes on bacterial community assemblage was found in low hydrodynamics. Furthermore, the structural equation model showed hydrodynamic conditions induced by sinuosity regulated carbon emissions by directly and indirectly affecting the bacterial status. This study revealed the existence of alternative bacterial states under hydrodynamic conditions in meandering channels and explored the relationships between the bacterial states and carbon emissions, therefore providing insights into river reconstruction for an appropriate trade-off of urban river channel sinuosity.
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Affiliation(s)
- Meirong Wu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Wenlong Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
| | - Haolan Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Yanan Ding
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Feng Yu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Jiahui Shang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Jiaxin Tong
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
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Zhang D, Bao Y, Wang Y, Feng J, Li R, Du Y, Wang D, Chen F, Li S, Wen J, Chen Z. Coalescence characteristics of free-living and particle-attached bacteria in a cascade river-reservoir system: A case study of the Jinsha River. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 374:124088. [PMID: 39805160 DOI: 10.1016/j.jenvman.2025.124088] [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: 09/13/2024] [Revised: 12/11/2024] [Accepted: 01/07/2025] [Indexed: 01/16/2025]
Abstract
Microbial coalescence plays a crucial role in shaping aquatic ecosystems by facilitating the merging of neighboring microbial communities, thereby influencing ecosystem structure. Although this phenomenon is commonly observed in natural environments, comprehensive quantitative comparative studies on different lifestyle bacteria involved in this process are still lacking. The study focuses on 16S rRNA Amplicon Sequence Variants (ASVs) at the Jinsha River hydropower stations (Wudongde [WDD], Baihetan [BHT], Xiluodu [XLD], Xiangjiaba [XJB]), specifically examining free-living (FL) and particle-attached (PA) bacteria. Minimal differences in microbial composition were observed across water layers (surface, middle, and bottom). Analyses of overlapping ASVs, Bray-Curtis dissimilarity, and the SourceTracker algorithm revealed a significant difference in the coalescence ability of FL and PA bacteria, particularly in the surface water of XJB (FL: 31.1% ± 2.0%, PA: 27.6% ± 2.5%, p < 0.05). The coalescence of FL bacteria was primarily influenced by the mixing of adjacent water layers, while PA bacteria exhibited significant geographical variations across water layers (p < 0.05), displaying lower coalescence compared to FL bacteria. Using a cohesion metric, 12 keystone species in PA bacteria were identified and 7 in FL bacteria. Proteobacteria and Bacteroidetes were the most abundant phyla at the keystone species in PA and FL bacteria, respectively. The abundance of keystone ASVs decreased with distance in PA bacteria, whereas FL bacteria showed the opposite trend. At the genus level, Brevundimonas and Chryseobacterium were identified as keystone species in both lifestyles. Moreover, the impact of community coalescence on the stability tends to exhibit differences downstream in cascade stations. This study provides novel insights into the dynamic variations of microbial communities with diverse lifestyles in stratified aquatic environments and assesses the impact of dam construction on microbial coalescence and the alteration of keystone species.
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Affiliation(s)
- Dan Zhang
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China; Ecological Environment Engineering Research Center of the Yangtze River, China Three Gorges Corporation, Wuhan, 430014, China
| | - Yufei Bao
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
| | - Yuchun Wang
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
| | - Jingjie Feng
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Ran Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Yanliang Du
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Dianchang Wang
- Ecological Environment Engineering Research Center of the Yangtze River, China Three Gorges Corporation, Wuhan, 430014, China
| | - Fei Chen
- Ecological Environment Engineering Research Center of the Yangtze River, China Three Gorges Corporation, Wuhan, 430014, China
| | - Shanze Li
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Jie Wen
- State Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
| | - Zhuo Chen
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
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Kou X, Huang S, Bian R, Tang Q, Wang H, Liu S, Wang L, Qi W, Cao X, Lan H, Liu H, Qu J. Evidence of sewage discharge on the coalescence mechanism of aquatic microbial communities during high amplitude hydrological periods. THE SCIENCE OF THE TOTAL ENVIRONMENT 2025; 959:178223. [PMID: 39721543 DOI: 10.1016/j.scitotenv.2024.178223] [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: 10/09/2024] [Revised: 12/04/2024] [Accepted: 12/14/2024] [Indexed: 12/28/2024]
Abstract
Microbial community coalescence is a ubiquitous ecological process in various ecosystems. However, limited research has addressed the effects of the coalescence on microbial ecological processes and network structure, particularly in the context of sewage discharge during high amplitude hydrological periods. Employing 16S rRNA sequencing and species source tracking analysis, we investigated the coalescence pattern of bacterioplankton in the Chishui river and sewage across various hydrological periods. The results demonstrated that the downstream bacterioplankton mainly originated from the upstream water body, and the sewage discharge from the wastewater treatment plants (WWTPs) had less impact on the downstream bacterioplankton. In the low-water period, the bacterioplankton community showed significant coalescence, and the specialist species and functional taxa gathered in the downstream. Bacterioplankton displayed distinct ecological succession patterns after community coalescence, with notable variations in the abundance of dominant group. Bacterioplankton community assembly was dominated by stochastic processes in river and the sewage over different hydrological periods. The ecological networks exhibited the highest complexity in the high-water period, whereas their stability was most pronounced in the low-water period. Species diversity, as opposed to functional and phylogenetic diversity, might be a more accurate indicator to predict changes in microbial network structure. Our findings will provide new perspectives on the mechanisms of aquatic microbial community coalescence in natural environments.
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Affiliation(s)
- Xin Kou
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shier Huang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Rui Bian
- School of Environment, Northeast Normal University, Changchun 130117, China
| | - Qingwen Tang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Hui Wang
- Kweichow Moutai Distillery (Group) Co., Ltd., Zunyi 564501, China; Chishui River Middle Basin, Watershed ecosystem, Observation and Research Station of Guizhou Province, Zunyi 564501, China
| | - Song Liu
- Kweichow Moutai Distillery (Group) Co., Ltd., Zunyi 564501, China
| | - Li Wang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Kweichow Moutai Distillery (Group) Co., Ltd., Zunyi 564501, China
| | - Weixiao Qi
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiaofeng Cao
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Center for Ecological Civilization, Tsinghua University, Beijing 100084, China; Center of Tsinghua Think Tanks, Tsinghua University, Beijing 100084, China.
| | - Huachun Lan
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huijuan Liu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Jiuhui Qu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
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Hu Y, Song Y, Cai J, Chao J, Gong Y, Jiang X, Shao K, Tang X, Gao G. Stronger biogeographical pattern of bacterioplankton communities than biofilm communities along a riverine ecosystem: A local scale study of the Kaidu river in the arid and semi-arid northwest of China. ENVIRONMENTAL RESEARCH 2025; 264:120294. [PMID: 39505133 DOI: 10.1016/j.envres.2024.120294] [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: 07/16/2024] [Revised: 10/31/2024] [Accepted: 11/04/2024] [Indexed: 11/08/2024]
Abstract
Although the biogeographical pattern and mechanisms underlying microbial assembly have been well-explored in lentic ecosystems, the relevant scenarios in lotic ecosystems remain poorly understood. By sequencing the bacterial communities in bacterioplankton and biofilm, our study detected their distance-decay relationship (DDR), and the balance between deterministic and stochastic processes, along the Kaidu river in an arid and semi-arid region of northwest China. Our results revealed that bacterioplankton and biofilm had significantly contrasting community structures. The bacterioplankton communities showed a gradually decreasing trend in alpha-diversity from the headwater to the river mouth, contrasting with the alpha-diversity of biofilm communities which was constant along the river length. Both bacterioplankton and biofilm showed significant DDRs along the 500-km river corridor with the slope of the bacterioplankton DDR being steeper than that of the biofilm DDR, which implies a stronger biogeography of bacterioplankton than biofilm. Relative to biofilm communities, the species interactions formed a denser and more complex network in the bacterioplankton communities than in the biofilm communities. Our results also revealed that there was a transition of community assembly from deterministic to stochastic processes upstream to downstream, although both the bacterioplankton and biofilm communities were mainly regulated by deterministic processes within the entire river. All these empirical results expand our knowledge of microbial ecology in an arid and semi-arid lotic ecosystem.
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Affiliation(s)
- Yang Hu
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China
| | - Yifu Song
- Nanjing Forestry University, Nanjing, 210008, China
| | - Jian Cai
- Xiangyang Polytechnic, Hubei Province, 441000, China
| | - Jianying Chao
- Nanjing Institute of Environmental Science, Nanjing, 210008, China
| | - Yi Gong
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China
| | - Xingyu Jiang
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China
| | - Keqiang Shao
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China
| | - Xiangming Tang
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China
| | - Guang Gao
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China.
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Xu H, Zhang Y, Fan D, Meng S, Fan L, Song C, Qiu L, Li D, Fang L, Liu Z, Bing X. Influences of Community Coalescence on the Assembly of Bacterial Communities of the Small-Scale Complex Aquatic System from the Perspective of Bacterial Transmission, Core Taxa, and Co-occurrence Patterns. MICROBIAL ECOLOGY 2024; 87:145. [PMID: 39570409 PMCID: PMC11582176 DOI: 10.1007/s00248-024-02461-5] [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: 08/24/2024] [Accepted: 11/07/2024] [Indexed: 11/22/2024]
Abstract
Recirculating aquaculture and aquaponics are considered sustainable aquaculture models playing important roles in animal-derived protein supply. In these aquaculture systems, microorganisms are crucial for the system stability. The community coalescence by mixing substances and microorganisms from various microhabitats under hydraulic forces is important for shaping the bacterial communities in these small-scale complex systems. However, the influences of community coalescence on bacterial communities remain rarely revealed in these systems. In this study, aquaponics (APS) and recirculating aquaculture (RAS) systems were set up to explore the bacterial community coalescence across different microhabitats, including water, fish feces, biofilter biofilms, and plant rhizosphere environment. Our results showed that diversity and compositions varied across different microhabitats in both systems. However, bacterial transmissions across these microhabitats differed between systems. The core microbiome of the RAS and APS were formed under community coalescence with the highest contribution of bacterial taxa derived from the fish feces. Nevertheless, the plant rhizosphere bacterial community also contributed to the core microbiome of the APS. Furthermore, the core taxa showed a higher average degree than the other nodes in the bacterial community networks in all microhabitats except for the plant rhizosphere environment, implying the important roles of core taxa in maintaining these bacterial community networks. Our results provide new insights into the assembly of bacterial communities under community coalescence in the artificial aquatic ecosystems comprising complex microhabitats, which is vital for developing microbial solutions for regulating the microbial communities to improve system performance in the future.
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Affiliation(s)
- Huimin Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Yi Zhang
- Water Conservancy Development Research Center of Taihu Basin Authority Ministry of Water Resource, Shanghai, 200438, China
| | - Dingyue Fan
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
- College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai, 201306, China
| | - Shunlong Meng
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China.
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China.
| | - Limin Fan
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Chao Song
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Liping Qiu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Dandan Li
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Longxiang Fang
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Zhuping Liu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China
- Laboratory of Quality & Safety Risk Assessment for Aquatic Products On Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, Wuxi, 214081, China
| | - Xuwen Bing
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China.
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Jiajun L, Biao Z, Guangshuai Z, Sihui S, Yansong L, Jinhui Z, Jiuliang W, Xiangyu G. Flooding promotes the coalescence of microbial community in estuarine habitats. MARINE ENVIRONMENTAL RESEARCH 2024; 202:106735. [PMID: 39241542 DOI: 10.1016/j.marenvres.2024.106735] [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: 06/17/2024] [Revised: 09/01/2024] [Accepted: 09/02/2024] [Indexed: 09/09/2024]
Abstract
Microbial community coalescence describes the mixing of microbial communities and their integration with the surrounding environment, which is common in natural ecosystems and has potential impacts on ecological processes. However, few studies have focused on microbial community coalescence between different habitats in estuarine regions. In this study, we comprehensively investigated the environmental characteristics and bacterial community changes of different habitats (water body (Water), subtidal sediments (SS) and intertidal salt marsh sediments (SM)) in Luanhe estuary during flood and normal flow periods. The results showed that flood event significantly reduced the salinity of the estuarine habitats, changed the nutrient structure and intensified the eutrophication of estuarine water. By calculating the proportion of overlapping groups and applying the 'FEAST' algorithm, we revealed that flood event facilitated the migration of bacterial communities along alternative pathways across habitats, markedly enhanced the cross-habitat mobility of bacterial communities, which underscores the pivotal role of flood event in driving bacterial community coalescence. Flood-induced community coalescence not only increased the α-diversity of bacterial communities within habitats, but also increased the proportion of overlapped species between habitats, ultimately leading to homogenization between habitats. Canonical correlation analysis combined co-occurrence network analysis revealed that flood event attenuated the role of environmental filtration in microbial assembly, while increased the impact of dispersal processes and intensified interspecific competition among microorganisms, led to the change of keystone species and reduced the complexity and stability of bacterial communities. In conclusion, this study demonstrates the complex effects of flood events on estuarine microbial communities from the perspective of multi-habitat interactions in the estuary, and emphasizes the key role of river hydrodynamic conditions in facilitating the coalescence of estuarine microbial communities. We look forward to further attention and research on estuarine microbial coalescence, which will provide new insights into assessing the stability and resilience of estuarine ecosystems under flood challenges and the sustainable management of estuarine wetlands.
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Affiliation(s)
- Li Jiajun
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China
| | - Zhang Biao
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China; School of Ocean Science, China University of Geosciences, Beijing, China.
| | - Zhang Guangshuai
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; National Marine Environmental Monitoring Center, Dalian, Liaoning, China
| | - Shao Sihui
- The Institute of Geo-environment Monitoring of Hebei Province, Shijiazhuang, Hebei, China
| | - Li Yansong
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China
| | - Zhang Jinhui
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China
| | - Wang Jiuliang
- State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, Dalian, Liaoning, China; The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China
| | - Guan Xiangyu
- The Fifth Geology Company of Hebei Geology & Minerals Bureau, Tangshan, Hebei, China; School of Ocean Science, China University of Geosciences, Beijing, China
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8
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Chang C, Hu E, Shi Y, Pan B, Li M. Linking microbial community coalescence to ecological diversity, community assembly and species coexistence in a typical subhumid river catchment in northern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 938:173367. [PMID: 38796011 DOI: 10.1016/j.scitotenv.2024.173367] [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: 01/12/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 05/28/2024]
Abstract
Community coalescence denotes the amalgamation of biotic and abiotic factors across multiple intact ecological communities. Despite the growing attention given to the phenomenon of coalescence, there remains limited investigation into community coalescence in single and multiple source habitats and its impact on microbial community assemblages in sinks. This study focused on a major river catchment in northern China. We investigated microbial community coalescence across different habitats (i.e., water, sediment, biofilm, and riparian soil) and seasons (i.e., summer and winter). Using 16S rRNA gene amplicon sequence variants, we examined the relationship between community coalescence and microbial diversity, assembly processes, and species coexistence. The results showed that the intensity of microbial community coalescence was higher in the same habitat pairs compared to disparate habitat pairs in both summer and winter. During the occurrence of microbial community coalescence, the assembly processes regulated the intensity of coalescence. When the microbial community exhibited strong heterogeneous selection (heterogeneous environmental conditions leading to more dissimilar community structures), the intensity of community coalescence was low. With the assembly process shifted towards stochasticity, coalescence intensity increased gradually. However, when homogeneous selection (homogeneous environmental conditions leading to more similar community structures) predominantly shaped microbial communities, coalescence intensity exceeded the threshold of 0.25-0.30. Moreover, the enhanced intensity of community coalescence could increase the complexity of microbial networks, thereby enhancing species coexistence. Furthermore, the assembly processes mediated the relationship between community coalescence and species coexistence, underscoring the pivotal role of intermediate intensity of community coalescence in maintaining efficient species coexistence. In conclusion, this study highlights the crucial role of community coalescence originating from single and multiple source habitats in shaping microbial communities in sinks, thus emphasizing its central importance in watershed ecosystems.
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Affiliation(s)
- Chao Chang
- College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - En Hu
- Shaanxi Provincial Academy of Environmental Science, Xi'an 710061, Shaanxi, China
| | - Yifei Shi
- Shaanxi Environmental Investigation and Assessment Center, Xi'an 710054, Shaanxi, China
| | - Baozhu Pan
- State Key Laboratory of Eco-hydraulics in the Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China
| | - Ming Li
- College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China.
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9
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Hu M, Zhu Y, Hu X, Zhu B, Lyu S, A Y, Wang G. Assembly mechanism and stability of zooplankton communities affected by China's south-to-north water diversion project. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121497. [PMID: 38897077 DOI: 10.1016/j.jenvman.2024.121497] [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: 01/24/2024] [Revised: 05/17/2024] [Accepted: 06/14/2024] [Indexed: 06/21/2024]
Abstract
Water diversion can effectively alleviate water resource shortages and improve water environmental conditions, while also causing unknown ecological consequences, in particular, the assembly mechanism of zooplankton communities in the affected areas will become more complex after long-term water transfer. Taking Nansi Lake, the second largest impounded lake along the eastern route of China's South to North Water Diversion Project (SNWDP), as an example, the composition and diversity of zooplankton communities in the lake area and estuaries during the water diversion period (WDP) and non-water diversion period (NWDP) were studied. The potential assembly process of zooplankton communities was further explored, and the stability of communities in different regions during different periods was compared. The related results indicated that the changes in water quality conditions induced by water diversion had a relatively weak impact on the zooplankton communities. In the assembly mechanism of zooplankton communities, stochastic process played a more important role during both WDP or NWDP, and the proportion of deterministic process was relatively higher during NWDP, which may be related to the greater role of total nitrogen (TN) in the assembly of the zooplankton communities. The network analysis and cohesion calculation results showed that the stability of the zooplankton communities in the lake area sites was higher than that in the estuary sites, and the stability during NWDP was higher than that during WDP. In sum, the stability of zooplankton communities displayed a degree of change affected by water diversion activities, but the community assembly was not significantly influenced by the water quality fluctuations after about relatively long-term water diversion. This study provides an in-depth understanding of the ecological effects of water diversion on the biological communities in the affected lake, which is beneficial to the management and regulation of long-term water diversion projects.
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Affiliation(s)
- Man Hu
- Key Laboratory of Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
| | - Yi Zhu
- Key Laboratory of Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
| | - Xiaoyi Hu
- Key Laboratory of Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China; China South-to-North Water Diversion Corporation Eco-environmental Protection Co., Ltd., Beijing, 100036, PR China
| | - Biru Zhu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, 100875, PR China.
| | - Shengmei Lyu
- Key Laboratory of Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
| | - Yinglan A
- Innovation Research Center of Satellite Application, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, PR China.
| | - Guoqiang Wang
- Innovation Research Center of Satellite Application, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, PR China.
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10
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Custer GF, Bresciani L, Dini-Andreote F. Toward an integrative framework for microbial community coalescence. Trends Microbiol 2024; 32:241-251. [PMID: 37778924 DOI: 10.1016/j.tim.2023.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 09/05/2023] [Accepted: 09/11/2023] [Indexed: 10/03/2023]
Abstract
Community coalescence is defined as the mixing of intact ecological communities. From river confluences to fecal microbiota transplantation, community coalescence constitutes a common ecological occurrence affecting natural and engineered microbial systems. In this opinion article, we propose an integrative framework for microbial community coalescence to guide advances in our understanding of this important - yet underexplored - ecological phenomenon. We start by aligning community coalescence with the unified framework of biological invasion and enumerate commonalities and idiosyncrasies between these two analogous processes. Then, we discuss how organismal interactions and cohesive establishment affect coalescence outcomes with direct implications for community functioning. Last, we propose the use of ecological null modeling to study the interplay of ecological processes structuring community reassembly following coalescence.
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Affiliation(s)
- Gordon F Custer
- Department of Plant Science and Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA; The One Health Microbiome Center, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA.
| | - Luana Bresciani
- Department of Plant Science and Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA; The One Health Microbiome Center, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Francisco Dini-Andreote
- Department of Plant Science and Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA; The One Health Microbiome Center, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA.
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11
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Hu JP, Zhang MX, Lü ZL, He YY, Yang XX, Khan A, Xiong YC, Fang XL, Dong QM, Zhang JL. Grazing practices affect phyllosphere and rhizosphere bacterial communities of Kobresia humilis by altering their network stability. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165814. [PMID: 37517723 DOI: 10.1016/j.scitotenv.2023.165814] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/01/2023]
Abstract
The primary utilization strategy for meadow grasslands on the Qinghai-Tibet Plateau (QTP) is livestock grazing. This practice is considered as one of the major drivers of plant-associated bacterial community construction and changes in soil properties. The species of Kobresia humilis is considered as the most dominant one in grasslands. However, how different grazing practices affect the phyllosphere and rhizosphere bacterial communities of K. humilis is unknown. To address this issue, the effects of the grazing enclosure (GE), single-species grazing (YG and SG, representing yak only and sheep only, respectively), and different ratios of grazing (ratio of yak to sheep is 1:2, 1:4, and 1:6, represented by MG1:2, MG1:4, and MG1:6, respectively) on the dominant plant of K. humilis, it's phyllosphere and rhizosphere bacteria, and soil properties were investigated using artificially controlled grazing and grazing enclosure. Our data showed that grazing enclosure enhanced vegetation coverage, and rhizosphere bacterial richness and diversity, while reduced plant number and bacterial network stability of K. humilis. The NO3--N, K+, and Cl- concentrations were lower under grazing compared to GE. SG reduced the concentration of NH4+-N, TN, K+, and Na+ compared to YG. Moderate grazing intensity had a lower relative abundance of the r-strategists (Bacteroidota and Gammaproteobacteria) with higher bacterial network stability. Yak and sheep grazing showed reversed impacts on the bacterial network stability between the phyllosphere and rhizosphere of K. humilis. Proteobacteria and Actinobacteriota were identified in the molecular ecological network analysis as keystone taxa in the phyllosphere and rhizosphere networks, respectively, under all treatments. This study explained why sheep grazing has more adverse effects on grazing-tolerant grass species, K. humilis, than yak grazing, and will contribute to a better understanding of the impacts of different grazing practices and grazing enclosure on alpine grassland ecosystems on the QTP.
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Affiliation(s)
- Jin-Peng Hu
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Ming-Xu Zhang
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Zhao-Long Lü
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Yuan-Yuan He
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Xiao-Xia Yang
- Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, People's Republic of China
| | - Aziz Khan
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; College of Ecology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - You-Cai Xiong
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; College of Ecology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Xiang-Ling Fang
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Quan-Min Dong
- Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, People's Republic of China.
| | - Jin-Lin Zhang
- Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China.
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12
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Determinants and Assembly Mechanism of Bacterial Community Structure in Ningxia Section of the Yellow River. Microorganisms 2023; 11:microorganisms11020496. [PMID: 36838461 PMCID: PMC9967387 DOI: 10.3390/microorganisms11020496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
The Yellow River is a valuable resource in the Ningxia Hui Autonomous Region and plays a vital role in local human activities and biodiversity. Bacteria are a crucial component of river ecosystems, but the driving factors and assembly mechanisms of bacterial community structure in this region remain unclear. Herein, we documented the bacterial community composition, determinants, co-occurrence pattern, and assembly mechanism for surface water and sediment. In comparison to sediment, the bacterioplankton community showed significant seasonal variation, as well as less diversity and abundance. The network topology parameters indicated that the sediment bacterial network was more stable than water, but the bacterioplankton network had higher connectivity. In this lotic ecosystem, CODMn, Chl a, and pH affected the structure of the bacterioplankton community, while TP was the primary factor influencing the structure of the sediment bacterial community. The combined results of the neutral community model and the phylogenetic null model indicate that Bacterial communities in both habitats were mainly affected by stochastic processes, with ecological processes dominated by ecological drift for bacterioplankton and dispersal limitation for sediment bacteria. These results provide essential insights into future research on microbial ecology, environmental monitoring, and classified management in the Ningxia section of the Yellow River.
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