文献类型： 外文期刊

作者： Wang, Shuping ¹ ; Gu, Songsong ² ; Zhang, Yaqun ³ ; Deng, Ye ² ; Qiu, Wenhui ⁵ ; Sun, Qianhang ¹ ; Zhang, Tianxu ¹ ; Wang, Pengyuan ¹ ; Yan, Zhenguang ¹ ;

作者机构： 1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China

3.Chinese Acad Fishery Sci, Key Lab Aquat Genom, Minist Agr & Rural Affairs, Beijing Key Lab Fishery Biotechnol, Beijing 100141, Peoples R China

4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China

5.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut C, Shenzhen 518055, Peoples R China

关键词： Ecological water replenishment; Community stability; Succession; Community assembly mechanism; Ecological network

期刊名称：ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY （ 影响因子：12.6； 五年影响因子：12.6 ）

ISSN： 2666-4984

年卷期： 2024 年 20 卷

页码：

收录情况： SCI

摘要： 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 challenge. Here, we examine the impact of EWR on microeukaryotic plankton communities in three distinct river ecosystems through environmental DNA (eDNA) metabarcoding. The three ecosystems include a long-term cut-off river, a short-term connected river after EWR, and long-term connected rivers. We analyzed community stability by investigating species composition, stochastic and deterministic dynamics interplay, and ecological network robustness. We found that EWR markedly reduced the diversity and complexity of microeukaryotic plankton, altered their community dynamics, and lessened the variation within the community. Moreover, EWR disrupted the deterministic patterns of community organization, favoring dispersal constraints, and aligning with trends observed in naturally connected rivers. The 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 in fluenced community assembly. The ecological network in temporarily connected rivers post-EWR demonstrated signi ficantly greater stability and intricacy compared to other river systems. This shift markedly bolstered the resilience of the ecological network. The 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. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of Chinese Society for Environmental Sciences, Harbin Institute of Technology, Chinese Research Academy of Environmental Sciences. This is an open access article under the CC BY -NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).