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Effects of stereoscopic artificial floating wetlands on nekton abundance and biomass in the Yangtze Estuary

文献类型： 外文期刊

作者： Huang, Xiaofeng 1 ; Zhao, Feng 2 ; Song, Chao 2 ; Gao, Yu 2 ; Geng, Zhi 3 ; Zhuang, Ping 1 ;

作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214182, Peoples R China

2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

3.East China Normal Univ, Coll Life Sci, Shanghai 200241, Peoples R China

关键词： Stereoscopic artificial floating wetlands;Fish aggregation devices;Phragmites australis;Habitat;Yangtze estuary

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN：

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收录情况： SCI

摘要： Habitat degradation is one of the greatest existing threats to nekton biodiversity in estuarine and coastal habitats. Stereoscopic artificial floating wetlands (SAFWs) can provide new nekton habitats and have been widely used as conservation and management tools in freshwater and marine environments. In the current study, we constructed Phragmites australis SAFWs: the P. australis rhizomes were planted on the artificial floating beds, and palm slices were hung under the floating platforms to act as submerged plants. These SAFWs were anchored in the north channel of the Yangtze Estuary. To determine if SAFWs can serve as fish aggregation devices, fishes and crustaceans were sampled monthly using a bottom lift net during high-tide from July to October 2014. Our assessment was based on environmental parameters, nekton density, nekton species composition and the total length of the three most abundant fishes at the experimental and control sites. Nekton abundance was approximately three times greater in the SAFWs than that in the control habitats (108.2 +/- 27.56 ind./m(2) vs. 28.37 +/- 15.88 ind./m(2), respectively). There were no significant habitat-specific differences in the size distribution of the three most abundant fish species (Acanthogobius ommaturus, Odontamblyopus rubicundus and Eleutheronema tetradactylum) because most of the individuals sampled were juveniles. This study demonstrates that SAFWs can form stable environments for nekton and increase habitat available to juvenile fish. (C) 2017 Elsevier Ltd. All rights reserved.

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