Effect of Bellamya purificata on organic matter degradation in surface sediment as revealed by amino acids

文献类型： 外文期刊

第一作者： Hou, Yiran

作者： Hou, Yiran;Li, Bing;Zhang, Chengfeng;He, Jie;Zhu, Jian;Luo, Jiawei

作者机构：

关键词： Bellamya purificata; Bioturbation; Aquaculture ecosystem; Organic matter degradation; Sediment; Amino acid

期刊名称：AQUACULTURE ENVIRONMENT INTERACTIONS （ 影响因子：3.074； 五年影响因子：3.475 ）

ISSN： 1869-215X

年卷期： 2021 年 13 卷

页码：

收录情况： SCI

摘要： The accumulation of organic matter (OM) in the sediment of aquaculture ponds is a potential threat for aquaculture ecosystems and the surrounding environment. The snail Bellamya purificata is a potential bioremediation species which may solve this problem. To investigate the effects of B. purificata on OM degradation in surface sediment, an 84 d experiment was carried out. The experimental setup entailed 6 glass tanks which were divided into B. purificata treatment (BPT) and control (CON). AL the end of the experiment, a significantly lower degradation index (DI), reactivity index (RI), and carbon-normalized yield of amino acids were observed in BPT compared to CON, with meant +/- SD values of -0.47 +/- 0.43, 1.24 +/- 0.01, and 6.24 +/- 0.44, respectively. BPT showed higher oxidation-reduction potential and bacterial 16S rRNA gene copies than CON. Total organic carbon, total nitrogen, and total hydrolysable amino acid concentrations in the BPT treatment were 1.83 +/- 0.10%, 0.07 +/- 0.01%, and 22.38 +/- 0.53 mu mol g(-1), respectively, all of which were significantly lower than in CON. A clustered heat-map of different indexes related to OM degradation in sediments showed the final BPT as one separate category, which was different from the initial samples and the final CON. Overall, B. purificata could effectively facilitate OM degradation by promoting oxidation-reduction potential and bacterial populations, and ultimately by inhibiting the OM accumulation in sediment. Our results therefore provide support for the application of B. purificata to reduce the risk of endogenous pollution caused by OM accumulation in aquaculture ponds.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序