点击次数：

影响因子：6.8

DOI码：10.1016/j.ecoenv.2021.113067

发表刊物：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

关键字：The response of soil bacterial communities from farmland ecosystems to cadmium (Cd) pollution, in which a steep concentration gradient of more than 100 mg/kg has naturally formed, has not previously been fully reported. In this study, a field investigation was conducted in a typical severe Cd-polluted farmland ecosystem, andthe bacterial community response to the steep Cd gradient was analyzed. The results showed that Cd concentration sharply decreased from 159.2 mg/kg to 4.18 mg/kg among four sampling sites alongside an irrigation canal over a distance of 150 m. Bacterial diversity and richness were significantly lower in highly polluted sites, and random forest analysis indicated that Cd gradient played a decisive role in reducing alpha diversity. Redundancy analysis (RDA) and co-occurrence network indicated that the synergistic effects of pH, Cd, and phosphorus were the main drivers shaping community structure. The functional results predicted by BugBase suggested that the bacterial community may adapt to the harsh environment by recruiting Cd-resistant microbes and improving oxidative stress tolerance of the whole community. Cd-resistant microorganisms such as Burkholderia, Bradyrhizobium, and Sulfurifustis, which directly or indirectly participate in diminishing oxidative damage of Cd, may play essential roles in maintaining community stability and might be potential bacterial resources for the bioremediation of Cd pollution.

合写作者：Shaodong Fu, Emmannuel Konadu Sarkodie, Shuangfei Zhang, Luhua Jiang, Yili Liang, Huaqun Yin, Lianyang Bai, Xueduan Liu, Hongwei Liu*, Huidan Jiang*

第一作者：Yan Deng

论文类型：期刊论文

学科门类：理学

一级学科：生物学

文献类型：J

卷号：229

是否译文：否

发表时间：2022-01-01

收录刊物：SCI