Ecological implications of purple sea urchin (Heliocidaris crassispina, Agassiz, 1864) enhancement on the coastal benthic food web: evidence from stable isotope analysis
文献类型： 外文期刊
作者： Qin, Chuanxin 1 ; Chen, Pimao 1 ; Sara, Gianluca 4 ; Mo, Baolin 1 ; Zhang, Ankai 1 ; Li, Xiaoguo 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
2.Minist Agr, Sci Observing & Expt Stn South China Sea Fishery, Guangzhou 510300, Peoples R China
3.Chinese Acad Fishery Sci, Key Lab Marine Ranching, Guangzhou 510300, Peoples R China
4.Univ Palermo, Dipartimento Sci Terra & Mare, Viale Sci Ed 16, I-90128 Palermo, Italy
关键词： Benthic food web; Ecosystem; MixSIAR; Sea urchin; SIBER; Stable isotope; Stock enhancement
期刊名称：MARINE ENVIRONMENTAL RESEARCH （ 影响因子：3.13； 五年影响因子：4.368 ）
ISSN： 0141-1136
年卷期： 2020 年 158 卷
页码：
收录情况： SCI
摘要： A responsible approach to marine stock enhancement is an effective approach to restore fishery resources. While the release strategy of target species has been well investigated, the impacts on local ecological equilibrium and habitat qualities have only been poorly considered. In the present study, we evaluated how the macro-benthic food web in Daya Bay was affected by purple sea urchin (Heliocidaris crassispina (Agassiz, 1864) stock enhancement using stable isotope analyses (delta C-13 and delta N-15). Our results indicated that the distribution of local species and tmphic diversity were influenced to a certain degree by release of purple sea urchins and changes in the feeding habit of the urchins were observed in line with food abundance, which seasonally varied. When food is abundant, the main food source of sea urchins was microphytobenthos and no significant differences were observed among sites; significant differences in the diet of purple sea urchins were detected when food is less abundant. These results suggested that optimization of the release strategy should include information on seasonal productivity of local recipient sites, food web structure and feeding habits of released species. Such information is essential for building a responsible release approach to maximize production enhancement.
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