基于系统发育和功能性状的向家坝库区鱼类群落构建机制

doi:10.16378/j.cnki.1003-1111.23082

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Abstract The fish community was investigated in the Xiangjiaba Reservoir of the lower reaches of the Jinsha River in the upper reaches of the Changjiang River in April, August and November 2017. Through phylogenetic and functional trait analysis, the mechanism of fish community assembly in the Xiangjiaba Reservoir area was explored from the spatial scale (Shaonüping in front part of the reservoir, Suijiang in the middle part of the reservoir, and Huixi in the end part of the reservoir) and time scale (2011 before the impoundment, 2015 one year after the completion of the impoundment, and 2017 three years after the completion of the impoundment). The results showed that the standardized effect of mean pairwise phylogenetic distances (SES.MPD) and standardized effect of mean pairwise functional distances (SES.MFD) in Shaonüping and Suijiang were negative, indicating that phylogeny and functional traits were more clustered than random communities, thus environmental filtering was a dominant ecological process determining the fish community in Shaonüping and Suijiang. The SES.MPD and SES.MFD were positive in Huixi, which exhibited phylogeny and functional traits that were more overdispersed than random communities, thus species competition was a dominant ecological process determining the fish community in Huixi. The SES.MPD and SES.MFD were negative before impoundment in the Suijiang section, which showed phylogeny and functional traits were clustered in the fish community, so environmental filtering derived in the community assembly before impoundment. However, one year and three years after impoundment, the results of the phylogenetic and functional analysis were inconsistent, and the environment after impoundment in the Suijiang section affected different aspects of fish community assembly through different filtering methods. Therefore, there were different mechanisms of fish community assembly in the Xiangjiaba Reservoir under different aspects. The findings will provide scientific guidance with assessment of ecological environmental impact of Xiangjiaba Reservoir and the protection of fish community in the reservoir.

Key words： fish community assembly Xiangjiaba Reservoir phylogeny functional trait

Received: 09 October 2023

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	Articles by authors
	LEI Tianjiao
	ZHANG Yun
	ZHAI Dongdong
	XIONG Fei
	CHEN Yuanyuan
	LIU Hongyan

Cite this article:

LEI Tianjiao,ZHANG Yun,ZHAI Dongdong, et al. Fish Community Assembly in Xiangjiaba Reservoir Based on Phylogeny and Functional Traits[J]. Fisheries Science, 2024, 43(6): 944-954.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.23082 OR https://www.shchkx.com/EN/Y2024/V43/I6/944

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