Carcass decay inhibits denitrification indirectly by regulating the microbiota and physicochemical properties in a model water system

IF 5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Journal of Applied Ecology Pub Date : 2024-08-02 DOI:10.1111/1365-2664.14748
Jiawei Yang, Qiaoling Yu, Wanghong Su, Sijie Wang, Xiaochen Wang, Qian Han, Huan Li
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胴体腐烂通过调节模型水系统中的微生物群和物理化学特性间接抑制反硝化作用
动物尸体分解参与了水生生态系统的氮(N)循环,如反硝化、挥发和沥滤。反硝化过程是氮循环的重要组成部分,有助于减轻硝酸盐积累造成的生物毒性。然而,尸体腐烂是否以及如何影响河水中的反硝化物及其活性仍是一个未知数。本研究采用高通量测序、实时定量 PCR 和反硝化酶活性(DEA)分析方法,在尸体腐烂造成氮污染的模型水系中研究了六种反硝化细菌(分别编码 napA、narG、nirK、nirS、norB 和 nosZ)及其反硝化活性。尸体腐烂增加了反硝化微生物群的数量并改变了其组成。距离矩阵的多元回归显示,尸体腐烂对反硝化群落的影响明显大于温度。出乎我们意料的是,在受尸体污染的水体中,反硝化微生物群落减少了。多元回归模型显示,反硝化类群的丰度和基因拷贝可共同预测 DEA 的变化,其中 norB 型 Hydrogenophaga 的贡献最大。此外,偏最小二乘路径模型(PLS-PM)显示,尸体腐烂通过反硝化群落和水的理化性质间接抑制了 DEA。综述与应用。本研究为了解尸体腐烂如何降低水系统中的反硝化活性提供了重要见解。这些发现有助于我们科学地管理和修复受污染的水体。
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来源期刊
Journal of Applied Ecology
Journal of Applied Ecology 环境科学-生态学
CiteScore
9.80
自引率
3.50%
发文量
229
审稿时长
4.5 months
期刊介绍: Journal of Applied Ecology publishes novel, high-impact papers on the interface between ecological science and the management of biological resources.The editors encourage contributions that use applied ecological problems to test and develop basic theory, although there must be clear potential for impact on the management of the environment.
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