Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Fisheries Science Academy, Qingdao, 266071, China.
Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, China.
Environ Sci Pollut Res Int. 2018 Jun;25(17):16842-16851. doi: 10.1007/s11356-018-1828-2. Epub 2018 Apr 4.
A novel approach was proposed to evaluate the potential risk of organic enrichment in marine aquaculture farms without obvious environmental degradation. The approach was based on historical environmental records preserved in sediment cores, and potential risk of organic enrichment can be effectively evaluated by comparing burial fluxes of marine organic carbon (OC) during times before and after large-scale aquaculture. A case study was conducted in Sanggou Bay. The change trends on burial fluxes of organic carbon in sediment over the past 150 years were rebuilt. OC burial fluxes have greatly increased since the beginning of large-scale aquaculture in 1980s, reaching 16.016.5 times higher than that before large-scale aquaculture. The results indicate that aquaculture activities have resulted in obvious accumulation of aquacultural organic matters, although sedimental environment has not degraded seriously. Besides, if the OC burial fluxes further increase to 3.57.0 times higher than that in present, sedimental environment may degrade obviously. Therefore, potential risks of organic enrichment still exist with aquaculture development in Sanggou Bay.
提出了一种新的方法来评估海洋养殖农场在没有明显环境退化的情况下有机富营养化的潜在风险。该方法基于沉积物岩芯中保存的历史环境记录，通过比较大规模养殖前后海洋有机碳（OC）埋藏通量，可以有效评估有机富营养化的潜在风险。在桑沟湾进行了案例研究。重建了过去 150 年来沉积物中有机碳埋藏通量的变化趋势。自 20 世纪 80 年代大规模养殖开始以来，OC 埋藏通量大大增加，达到大规模养殖前的 16.0-16.5 倍。结果表明，尽管沉积环境没有严重退化，但养殖活动导致了明显的养殖有机物的积累。此外，如果 OC 埋藏通量进一步增加到比现在高 3.5-7.0 倍，沉积环境可能会明显退化。因此，桑沟湾的养殖发展仍然存在有机富营养化的潜在风险。
