农业部渔业资源可持续利用重点开放实验室 中国水产科学研究院 黄海水产研究所, 山东 青岛266071
蒋增杰(1978–), 男, 副研究员, 博士, 主要从事海水养殖生态学研究. E-mail: jiangzj@ysfri.ac.cn
国家973计划项目(2011CB409805); 国家自然科学基金项目(41006074); 海洋公益性行业科研专项经费项目(200805069); 中国水产科学研究院黄海水产研究所基本科研业务费专项.
Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
利用稳定碳氮同位素示踪技术, 对南沙港网箱养殖水域沉积物中有机质的来源进行了分析研究。结果表明, 网箱养殖区(距离网箱边缘100 m范围内)及对照区(距离网箱边缘大于500 m)沉积物的δ13C值分别为(17.72 ± 1.2)‰和 (12.73 ± 0.38) ‰, δ15N分别为(6.44 ± 0.2) ‰和(5.61 ± 0.2)‰。网箱养殖区沉积物的有机质来源主要为残饵和鱼类粪便, 比例分别占47.70%和27.71%。随着与养殖网箱距离的增加, 网箱养殖源有机质(残饵和鱼类粪便之和)的比例降低, 变化趋势符合指数方程 y=97.167e-0.007 4x(R2=0.848 1), 在潮流驱动的沉积物再悬浮及野生鱼类的扰动影响下, 网箱养殖源有机质的水平位移可达400 m。鱼类网箱养殖的养殖废物是南沙港水域沉积物有机污染的主要来源。
We used stable carbon and nitrogen isotope analysis to identify the proportion of aquaculture-derived organic matter in the sediment in and around a coastal fish farm in China. The mean δ13C values were (17.72 ± 1.2)‰ and (12.73 ± 0.38)‰ in the regions around the fish farm (within 100 m from the edge of cages) and the control area (500 m from the edge of cages), respectively. The mean δ15N values were (6.44 ± 0.2)‰ and (5.61 ± 0.2)‰, respectively, for the same areas. The sediment near the fish farm contained a high proportion of waste feed and fish feces (47.70% and 27.71%, respectively). As the distance from the cages increased, the amount of aquaculture-derived organic matter decreased exponentially (y=97.167e-0.0074x, R2=0.848 1). The spatial extent of waste dispersal extended to an area up to 400 m due to bioturbation by wild or escaped fish and resuspension events. The waste organic matter generated by fish cage aquaculture is the primary source of organic pollution in the sediment of Nansha bay.
蒋增杰,方建光,毛玉泽,王巍.海水鱼类网箱养殖水域沉积物有机质的来源甄别[J].中国水产科学,2012,19(2):348-354
JIANG Zengjie, FANG Jianguang, MAO Yuze, WANG Wei. Identification of aquaculture-derived organic matter in the sediment associated with coastal fish farming[J]. Journal of Fishery Sciences of China,2012,19(2):348-354
