大黄鱼养殖衍生有机物沉降特征及其底栖生态效应研究

养殖衍生有机物（aquaculture-derived organic matter, AOM）是养殖水域环境问题的“源”。目前已有较多研究涉入其中，但尚有部分重要基础问题存疑。本项目聚焦网箱养殖衍生有机物的沉降特征及其底栖生态效应，选择国内最为典型的大黄鱼养殖区福建省三都澳为研究水域，开展以下研究：采用野外原位实验方法获取养殖衍生有机物，分析（方差分析方法）样品干重、有机物含量在采样站位间的差异以阐述其空间（水平和垂直）扩散特点；利用稳定同位素示踪技术和数学模型方法，量化研究养殖衍生有机物对于沉积物总有机质的贡献率，明确其对大型底栖动物优势种类的食源影响。本研究结论可为区域生态环境保护、大黄鱼健康养殖模式制定提供基础理论依据。

The deposition of aquaculture-derived organic matter (AOM) represents one of the main sources of pollutants in fish farming waters. Although there exists a number of studies concerning on this issue, some important fundamental problems are need to be solved. The present research focused on two aspects of AOM: deposition characteristics and its benthic ecological effects, using the Sandu Bay (in the Fujian Province) as a study area. Firstly, we intended to calculate the weight of AOM and the contents of total carbon, nitrogen and phosphorus, as well as spatial distribution characteristics, based on the site experiments and variance analysis method. Secondly, the research conducted a quantification study of the percentage that AOM accounting for the total organic contents of the sediment. Besides, we quantified the contribution of AOM in the food sources of the macrobenthos with number dominance. The conclusions of the study can be regarded as basic materials for the environmental protection in the Sandu Bay, as well as the formulation of healthy breeding manner of the large yellow croaker (Larimichthys crocea).