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Modeling trophic interactions and impacts of introduced icefish (Neosalanx taihuensisChen) in three large reservoirs in the Yangtze River basin, China

文献类型： 外文期刊

作者： Huang, Geng 1 ; Wang, Qidong 1 ; Du, Xue 5 ; Feng, Kai 1 ; Ye, Shaowen 1 ; Yuan, Jing 1 ; Liu, Jiashou 1 ; Li, Zhongjie 1 ;

作者机构： 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, 7 South Donghu Rd, Wuhan 430072, Hubei, Peoples R China

2.Minist Water Resources, Inst Hydroecol, Key Lab Ecol Impacts Hydraul Projects & Restorat, Wuhan 430079, Peoples R China

3.Chinese Acad Sci, Wuhan 430079, Peoples R China

4.Natl Res Ctr Freshwater Fisheries Engn, 7 South Donghu Rd, Wuhan 430072, Peoples R China

5.Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Harbin 150010, Peoples R China

6.Deakin Univ, Sch Life & Environm Sci, Warrnambool, Vic 3280, Australia

关键词： Non-native fish; Introduction; Aquatic ecosystem; Cascading reservoirs; Ecopath; Mass-balance model

期刊名称：HYDROBIOLOGIA （ 影响因子：2.694； 五年影响因子：2.781 ）

ISSN： 0018-8158

年卷期： 2020 年 847 卷 17 期

页码：

收录情况： SCI

摘要： Non-native fish introductions may damage aquatic ecosystems. To assess the ecological impacts of the introduced icefish (Neosalanx taihuensisChen), three reservoirs in a cascade, including the Shuibuya Reservoir (SBYR), which is devoid of icefish, and the Geheyan Reservoir (GHYR) and the Gaobazhou Reservoir (GBZR), which have large and small icefish populations, respectively, were selected for this study. Three mass-balance trophic models were established using the Ecopath approach. The results indicated that (1) the three ecosystems tended to depend more on the grazing food chain, possibly because the dominant fish species in three reservoirs were mainly filter feeders or planktivores; (2) the large icefish population in the GHYR decreased the overall energy transfer efficiency; (3) the ecosystem indices suggested that the GHYR ecosystem appeared to be a moderately mature system with a simple and vulnerable food web structure, and the lack of complexity was largely attributed to the large population of introduced icefish; and (4) the "mixed trophic impacts (MTI)" and niche overlap analysis indicated that the ecological impacts of icefish mainly came from predation and interspecific competition. This study demonstrates the consequence of icefish introduction to aquatic ecosystems and suggests that appropriate control of exotic fish is worth considering.

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