Influence of large reservoir operation on change patterns of fish community assembly and growth adaption at low and high-water levels

作者全名："Wei, Xing-Yi; Hu, Huan; Liu, Li; Wang, Yuan-Bo; Pei, De-Sheng"

作者地址："[Wei, Xing-Yi; Hu, Huan] Chongqing Jiaotong Univ, Sch River & Ocean Engn, Chongqing 400074, Peoples R China; [Wei, Xing-Yi; Hu, Huan; Liu, Li] Chinese Acad Sci, Univ Chinese Acad Sci, Chongqing Sch, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China; [Wei, Xing-Yi; Hu, Huan; Pei, De-Sheng] Chongqing Med Univ, Sch Publ Hlth, Chongqing 400016, Peoples R China"

通信作者："Pei, DS (通讯作者)，Chongqing Med Univ, Sch Publ Hlth, Chongqing 400016, Peoples R China."

来源：ECOLOGICAL INDICATORS

ESI学科分类：ENVIRONMENT/ECOLOGY

WOS号：WOS:001091687000001

JCR分区：Q1

影响因子：7

年份：2023

卷号：155

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：eDNA; Fish community; Environmental drivers; Community assembly; Growth adaptation

摘要："The Three Gorges Dam is the largest water conservancy project in the world, and the Three Gorges Reservoir Area (TGRA) possesses precious fish resources. Currently, due to the lack of efficient biodiversity monitoring tools, the precise evaluation of fish community composition in a riverine reservoir has been restricted. Here, we investigated fish resources using 12S-rDNA barcoding in the TGRA before and after 175 m water level during the first year of a 10-year Yangtze fishing ban. Our results showed that the fish composition exhibited obvious seasonal differences. The environmental water levels, land use, and spatial characteristics less influenced the development of fish communities. Based on Infer Community Assembly Mechanisms (iCAMP) by phylogenetic bin-based null model analysis, 66.12 % of unexplained variables were driven by stochastic processes of community assembly and unmeasured key factors. We developed a growth-limiting index (GLI) and firstly applied it to inferring fish environmental adaptability, revealing the growth adaption response of reservoir fish species to environmental pressure. Compared to the downstream from the dam, fish population growth at the low- or highwater levels was partly inhibited. However, seven species of tiny or medium-sized fish showed strong adaptability in the reservoir region at both water levels. Taken together, this study clarified the patterns of fish community assembly in the TGRA and provided unique insights for chronic monitoring of fish diversities in a reservoir."

基金机构："High-level Talents Project of Chongqing Medical University [R4014]; Chongqing Postdoctoral Innovation Mentor Studio [X7928]; Research Program of Chongqing Science and Technology Commission [cstc2019jcyj-zdxmX0035, CSTCCXLJRC201714]; China-Sri Lanka Joint Center for Education and Research, Chinese Academy of Sciences, China; China-Sri Lanka Joint Research and Demonstration Center for Water Technology"

基金资助正文："This work was supported by the High-level Talents Project of Chongqing Medical University (No. R4014) , Chongqing Postdoctoral Innovation Mentor Studio (X7928 D.S.P.) , Research Program of Chongqing Science and Technology Commission (Nos. cstc2019jcyj-zdxmX0035 and CSTCCXLJRC201714) , and China-Sri Lanka Joint Research and Demonstration Center for Water Technology, China-Sri Lanka Joint Center for Education and Research, Chinese Academy of Sciences, China."