State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
J Hazard Mater. 2022 Aug 15;436:129113. doi: 10.1016/j.jhazmat.2022.129113. Epub 2022 May 10.
Nickel (Ni) contamination imposes deleterious effects on the stability of soil ecosystem. Soil fungal community as a crucial moderator of soil remediation and biochemical processes has attracted more and more research interests. In the present study, soil fungal community composition and diversity under long-term Ni contamination were investigated and fungal interaction networks were built to reveal fungal co-occurrence patterns. The results showed that moderate Ni contamination significantly increased fungal diversity and altered fungal community structure. Functional predictions based on FUNGuild suggested that the relative abundance of arbuscular mycorrhizal fungi (AMF) significantly increased at moderate Ni contamination level. Ni contamination strengthened fungal interactions. Keystone taxa at different Ni contamination levels, such as Penicillium at light contamination, were identified, which might have ecological significance in maintaining the stability of fungal community to Ni stress. The present study provided a deeper insight into the effect of long-term Ni contamination on fungal community composition and co-occurrence patterns, and was helpful to further explore ecological risk of Ni contamination in cultivated field.
镍（Ni）污染对土壤生态系统的稳定性造成有害影响。土壤真菌群落作为土壤修复和生化过程的关键调节剂，引起了越来越多的研究兴趣。在本研究中，调查了长期镍污染下土壤真菌群落组成和多样性，并构建了真菌相互作用网络以揭示真菌共生模式。结果表明，适度的镍污染显著增加了真菌多样性并改变了真菌群落结构。基于 FUNGuild 的功能预测表明，在中度镍污染水平下，丛枝菌根真菌（AMF）的相对丰度显著增加。镍污染增强了真菌的相互作用。在不同镍污染水平下确定了关键类群，如轻度污染下的青霉，这可能对维持真菌群落对镍胁迫的稳定性具有生态意义。本研究深入了解了长期镍污染对真菌群落组成和共生模式的影响，有助于进一步探索农田中镍污染的生态风险。
