Longitudinal reconfiguration of multifaceted fish α and (3 diversity triggered by non-native species invasion in tropic rivers of Hainan Island
文献类型： 外文期刊
作者： Gu, Dangen 1 ; Zhang, Chi 3 ; Li, Gaojun 4 ; Xu, Meng 1 ; Wei, Hui 1 ; Fang, Miao 1 ; Shu, Lu 1 ; Wang, Xuejie 1 ; Peng, Keyang 5 ; Jiang, Zhongguan 5 ; Yu, Fandong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Prevent & Control Aquat Invas Alien Specie, Minist Agr & Rural Affairs, Guangzhou 510380, Peoples R China
2.Chinese Acad Fisheries Sci, Pearl River Fisheries Res Inst, Key Lab Alien Species & Ecol Secur CAFS, Guangzhou 510380, Peoples R China
3.Minist Agr & Rural Affairs, Rural Energy & Environm Agcy, Beijing 100125, Peoples R China
4.Hainan Acad Ocean & Fisheries Sci, Haikou 570100, Peoples R China
5.Anhui Univ, Sch Resources & Environm Engn, Hefei 230601, Peoples R China
关键词： Non-native fish invasion; River continuum; Functional diversity; Beta diversity; Tropic rivers
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）
ISSN： 0301-4797
年卷期： 2025 年 380 卷
页码：
收录情况： SCI
摘要： Human-mediated fish invasions have reconfigured the native fish faunas throughout the freshwater ecosystems worldwide. Beyond the well-documented homogenization reported in temperate basins, our knowledge on how multifaceted biodiversity response to fish invasions in tropic rivers remains poorly understood. It is also hanged in doubt that how fish invasions modify the longitudinal patterns of fish faunas under the concept of river continuum. Here, we applied one-way permutational multivariate analysis of variance to test how fish invasion influenced the longitudinal patterns of multifaceted alpha and (3 diversity of fish assemblages in three largest rivers of Hainan Island, China. Meanwhile, we employed multiple regression analysis to examine the relationships between the invasion degree and multiple alpha diversity indices as well as functional traits of native fishes. We found non-significant longitudinal variations for all multifaceted alpha diversity for native fish assemblages. However, our results demonstrated significantly longitudinal variations for multifaceted overall (3 diversity and its turnover components to the upstream-downstream gradient. Considering the consequence of non-native species invasion, we recorded tough homogenization in all the multifaceted aspects, as all the overall (3 diversity and its turnover components were concurrently significantly decreased after invasions. In comparation with upper reaches, the middle-lower reaches exhibited more significant homogeneous patterns incurred by invasions. In terms of biotic acceptance/resistance hypothesis, we found native fish faunas with higher richness, evenness and trophic level tented to resistant invaders, whereas with even phylogenetic compositions and late maturation showed acceptance to invasions.
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