Environmental DNA Captures Variations in Fish Assemblages with Distance from Dams in Karst Reservoirs
文献类型： 外文期刊
作者： Xu, Longfei 1 ; Yang, Dandan 1 ; Wang, Yizhou 2 ; Li, Junyi 3 ; Guo, Xingchen 1 ; Zeng, Cong 4 ; Jiang, Haibo 1 ; An, Miao 1 ; Shao, Jian 1 ;
作者机构： 1.Guizhou Univ, Key Lab Anim Genet Breeding & Reprod Plateau Mount, Minist Educ, Guiyang 550025, Peoples R China
2.Guizhou Univ, Coll Anim Sci, Guiyang 550025, Peoples R China
3.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Key Lab Freshwater Biodivers Conservat, Minist Agr & Rural Affairs China, Wuhan 430223, Peoples R China
4.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai 200030, Peoples R China
关键词： fish conservation; alpha diversity; beta diversity; dam; riverine reservoir; karst plateau
期刊名称：WATER （ 影响因子：3.4； 五年影响因子：3.5 ）
ISSN：
年卷期： 2023 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Dam impoundment can cause many adverse impacts on fish assemblages upstream of dams. Here, we investigated fish diversity in one plateau riverine reservoir (Wanfeng Reservoir) using environmental DNA (eDNA) metabarcoding technology. The following conclusions were drawn: (1) 39 species of fish were monitored belonging to 9 orders and 13 families in the Wanfeng Reservoir, most of which were Cypriniformes and included a variety of common farmed fish belonging to Culter, Oreochromis, Acipenser, and Clarias; (2) the fish assemblage structures in the Up (upstream section), Mid (midstream section), and RA (reservoir area section) of this reservoir was significantly different (p-value < 0.01); (3) among the 7 environmental variables that were measured (Tem, TDS, Sal, pH, DO, NH4+, and Tra), DO (p-value < 0.01) and pH (p-value < 0.05) were the main environmental stressors causing differences in fish assemblages in different sites of the Wanfeng Reservoir. This study concluded that dam construction in the karst region provided habitats for the establishment and dispersal of exotic fish.
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