Impacts of sea cucumber farming on biogeochemical characteristics in the Yellow River estuary, Northern China

文献类型： 外文期刊

第一作者： Fu, Jing

作者： Fu, Jing;Shibata, Shozo;Yokoyama, Hisashi;Yan, Jiaguo;Ma, Xu;Zhou, Jin

作者机构：

关键词： Sea cucumber farming; Apostichopus japonicus; Environmental impact; Aquaculture waste; Stable isotope; Yellow River estuary

期刊名称：PHYSICS AND CHEMISTRY OF THE EARTH （ 影响因子：2.712； 五年影响因子：3.076 ）

ISSN： 1474-7065

年卷期： 2017 年 97 卷

页码：

收录情况： SCI

摘要： To investigate the potential environmental effects of pond farming for Apostichopus japonicas in Yellow River estuary, we examined discrepancies of distance-based typical pollution indicators (TOC, TN, NO3- , NH4+, NO2- and PO43-) and biochemical tracers (d C-13 and d N-15) in water column and sediment, as well as dietary characteristics of dominant macrobenthos between farming and non-farming areas. The results revealed that studied variables in water column showed no uniform spatial differences. Meanwhile, those in sediment displayed similar decrease tendencies from farming pond to the adjacent tidal flat, which was considered to represent the environmental effects of farming. Biochemical tracers (delta C-13 and delta N-15) in both water column and sediment confirmed the origin of organic matters from the aquaculture waste. The detectable dispersion distance of aquaculture waste was restricted to an area within 50 m distance as determined by most variables in sediment (TOC, TN, NO3- and NH4-), particularly by C: N ratio and delta C-13 with which origins of the wastes were traced. Bayesian mixing models indicated that in the farming area BMA had a larger contribution, while POM(marine) showed a smaller contribution to the diets of Helice tridens and Macrophthalmus abbreviates compared to those in the non-farming area. The overall results showed that pond farming for Apostichopus japonicus in the Yellow River estuary altered the local environment to a certain extent. For methodological consideration, sediment biogeochemical characteristics as a historical recorder much more effectively reflected aquaculture waste accumulation, and stable isotope approaches are efficient in tracing the origin and extent of various allogenous sources. (C) 2016 Elsevier Ltd. All rights reserved.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序