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 (δ¹³C and δ¹⁵N). Our results indicated that the distribution of local species and trophic 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, while 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.

负责任的海洋资源增加方法是恢复渔业资源的有效方法。尽管已经对目标物种的释放策略进行了深入研究，但对当地生态平衡和栖息地质量的影响却很少考虑。在本研究中，我们评估大亚湾宏观底栖生物的食物网是如何受紫海胆（Heliocidaris海胆使用稳定同位素分析（δ（阿加西，1864年）的股票增强¹³ C和δ ¹⁵N）。我们的结果表明，紫色海胆的释放在一定程度上影响了当地物种的分布和营养多样性，并观察到海胆的摄食习性随食物丰富而变化，季节性随季节变化而变化。当食物丰富时，海胆的主要食物来源是微型底栖动物，各地点之间没有显着差异，而当食物不足时，紫色海胆的饮食也有显着差异。这些结果表明，释放策略的优化应包括有关当地接收地点的季节性生产力，食物网结构和释放物种的摄食习惯的信息。此类信息对于构建负责任的发布方法以最大程度地提高产量至关重要。