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Microeukaryotic plankton community dynamics under ecological water replenishment:Insights from eDNA metabarcoding

Environmental Science and Ecotechnology 2024年第4期20卷 278-290页

作者： Shuping Wang Songsong Gu Yaqun Zhang Ye Deng Wenhui Qiu Qianhang Sun Tianxu Zhang Pengyuan Wang Zhenguang Yan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China CAS Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China Key Laboratory of Aquatic Genomics Ministry of Agriculture and Rural AffairsBeijing Key Laboratory of Fishery BiotechnologyChinese Academy of Fishery SciencesBeijing100141China College of Resources and Environment University of Chinese Academy of SciencesBeijing100190China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen518055China

ecological water replenishment(EWR)is an important strategy for river restoration globally,but timely evaluation of its ecological effects at a large spatiotemporal scale to further adjust the EWR schemes is of great ***,we examine the impact of EWR on microeukaryotic plankton communities in three distinct river ecosystems through environmental DNA(eDNA)*** three ecosystems include a long-term cut-off river,a short-term connected river after EWR,and long-term connected *** analyzed community stability by investigating species composition,stochastic and deterministic dynamics interplay,and ecological network *** found that EWR markedly reduced the diversity and complexity of microeukaryotic plankton,altered their community dynamics,and lessened the variation within the ***,EWR disrupted the deterministic patterns of community organization,favoring dispersal constraints,and aligning with trends observed in naturally connected *** shift from an isolated to a temporarily connected river appeared to transition community structuring mechanisms from deterministic to stochastic dominance,whereas,in permanently connected rivers,both forces concurrently influenced community *** ecological network in temporarily connected rivers post-EWR demonstrated significantly greater stability and intricacy compared to other river *** shift markedly bolstered the resilience of the ecological *** eDNA metabarcoding insights offer a novel understanding of ecosystem resilience under EWR interventions,which could be critical in assessing the effects of river restoration projects throughout their life cycle.

关键词： ecological water replenishment Community stability Succession Community assembly mechanism ecological network

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