Spatial and temporal variabilities of coastal nekton community structure and phylogenetic diversity in Daya and Dapeng Bay, southern China
文献类型： 外文期刊
作者： Xu, Lei 1 ; Wang, Lianggen 1 ; Wang, Xuehui 1 ; Van Damme, Kay 3 ; Ning, Jiajia 1 ; Li, Yafang 1 ; Huang, Delian 1 ; Liu, 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisher Res Inst, Guangzhou 510300, Peoples R China
2.Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Peoples R China
3.Univ Ghent, Fac Sci, K.L. Ledeganckstr 35, B-9000 Ghent, Belgium
关键词： Nekton community; Phylogenetic diversity; Spatial and temporal pattern; Fishing intensity; Daya Bay; Dapeng Bay
期刊名称：ECOLOGICAL INDICATORS （ 影响因子：4.958； 五年影响因子：5.846 ）
ISSN： 1470-160X
年卷期： 2021 年 131 卷
页码：
收录情况： SCI
摘要： Coastal areas are important habitats for many species and strongly affected by anthropogenic activities. Management for sustainable coastal ecosystems benefits from a comprehensive assessment of species diversity. Here, we measured the spatio-temporal changes in community and phylogenetic structure of spring and autumn nektonic communities in Daya and Dapeng Bay among 12 sampling sites. We found that both the community structure and phylogenetic facets of nektonic communities in Daya and Dapeng Bay exhibited strong spatial and temporal patterns due which we attribute to fishing intensity and mid-summer fishing moratorium. The relatively larger ratio of unexplained variation in the autumn community resulted from stochastic processes caused by the mid-summer fishing moratorium. Furthermore, the phylogenetic structure of the spring nektonic communities between Dapeng and Daya Bay were significantly different; obvious phylogenetic clustering was found in spring nektonic communities of Dapeng Bay. These results implied that we may consider the current fishing intensity as a strong stress for nektonic communities, which exceeds the effect of natural processes and environmental factors. We speculate that the immediate sweeping fishing efforts may rapidly deplete the recovered fish stocks in a short time as human activities exert great stress on the nektonic communities in the study area. To avoid permanent damage to the ecosystem and a loss of valuable marine resources, urgent attention is required for fishery management.
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