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Incorporating the life stages of fish into habitat assessment frameworks: A case study in the Baihetan Reservoir

文献类型： 外文期刊

作者： Liu, Qingyuan 1 ; Zhang, Peng 1 ; Cheng, Bixin 2 ; Li, Yong 1 ; Li, Jia 1 ; Zhou, Huhai 3 ; Sun, Gan 4 ; Qing, Jie 2 ; Zhu, 1 ;

作者机构： 1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China

2.Shanghai Invest Design & Res Inst Corp Ltd, Shanghai 200434, Peoples R China

3.Yangtze River Fisheries Res Inst, Chinese Acad Fisheries Sci, Wuhan 430223, Hubei, Peoples R China

4.China Three Gorges Construct Grp Co Ltd, Chengdu 610041, Sichuan, Peoples R China

5.Hydro China Huadong Engn Corp Ltd, Hangzhou 310014, Zhejiang, Peoples R China

关键词： Fish life stages; Critical habitats; Impoundment effect; Tributary protection; Climate change

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN： 0301-4797

年卷期： 2021 年 299 卷

页码：

收录情况： SCI

摘要： Although it is widely accepted that the construction of dams may alter fish habitats, few studies have followed the life cycles of fish and combined the environmental conditions with the ecological behaviors and habit preferences of fish during reproductive processes to assess its effects of dam construction. In this study, we call for more sophisticated and holistic assessment framework, including effectiveness of technologies intended to mitigate environmental impacts in different life stages. An assessment framework that considers the swimming ability, perception ability of water flow and environmental preference of different fish species during migration, spawning and hatching was proposed. We used the Baihetan Reservoir as an example environment to assess the impoundment effect on the habitat of a tributary upstream of the reservoir. We observed shifts in the habitats of target fish in different life stages which is dominated by reservoir operation of the Baihetan Dam. Combined with the response of fish activities to impoundment, the selection of suitable positions for artificial breeding and release projects and the outlet of the fish transportation system were recommended measures to improve the migration possibilities. Our reassessment results also demonstrated the theoretical possibility and feasibility of joint improvements in spawning and hatching periods using instream structures. Our framework provides a complete set of "assessment-solution" processes for developers and managers to address the aquatic ecological degradation caused by resource development, and its use is strongly recommended for assessments or assessments of damming effects in other regions and on other fish species.

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