College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China; Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
College of Marine Life Sciences, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266003, China.
Mar Pollut Bull. 2022 Apr;177:113562. doi: 10.1016/j.marpolbul.2022.113562. Epub 2022 Mar 19.
To evaluate the impact of bottom aquaculture on benthic ecosystems, characteristics of benthic food web were studied using stable isotope techniques during four seasons in a Manila clam (Ruditapes philippinarum) bottom aquaculture area in a semi-enclosed bay, China. Results showed that although nitrogen stable isotope values of food sources (particulate organic matter and phytoplankton) had significant seasonal differences, there were no significant seasonal changes for benthic food web structure. Manila clam bottom aquaculture can enhance the secondary productivity and improve the basic trophic pathways by providing bio-deposits. Besides particulate organic matter and phytoplankton, Manila clam could feed on self-generated feces with high nitrogen stable isotope values, and benthic micro- and macroalga with high carbon stable isotope values. Secondary productivity of the stations with a high degree of aquaculture was higher than that of stations with a low degree. Bivalve bottom culture may have a positive impact on benthic ecosystem functioning.
为了评估底层水产养殖对底栖生态系统的影响，本研究采用稳定同位素技术，在中国一个半封闭海湾的马尼拉蛤（Ruditapes philippinarum）底层水产养殖区，对底栖食物网的特征进行了四个季节的研究。结果表明，尽管食物源（颗粒有机物质和浮游植物）的氮稳定同位素值具有显著的季节性差异，但底栖食物网结构没有明显的季节性变化。马尼拉蛤底层水产养殖通过提供生物沉积物，可以增强次级生产力，并改善基本的营养途径。除了颗粒有机物质和浮游植物外，马尼拉蛤还可以以具有高氮稳定同位素值的自生成粪便以及具有高碳稳定同位素值的底栖微藻和macroalga 为食。养殖程度高的站位的次级生产力高于养殖程度低的站位。双壳类底层养殖可能对底栖生态系统功能有积极影响。
