Zhao Siteng, Zhao Xueyong, Li Yulin, Zhang Rui, Zhao Yanming, Fang Hong, Li Wenshuang
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.
University of Chinese Academy of Sciences, Beijing, China.
Front Microbiol. 2023 Aug 3;14:1214186. doi: 10.3389/fmicb.2023.1214186. eCollection 2023.
Understanding the effects of groundwater depth on soil microbiota and multiple soil functions is essential for ecological restoration and the implementation of groundwater conservation. The current impact of increased groundwater levels induced by drought on soil microbiota and multifunctionality remains ambiguous, which impedes our understanding of the sustainability of water-scarce ecosystems that heavily rely on groundwater resources. This study investigated the impacts of altered groundwater depths on soil microbiota and multifunctionality in a semi-arid region. Three groundwater depth levels were studied, with different soil quality and soil moisture at each level. The deep groundwater treatment had negative impacts on diversity, network complexity of microbiota, and the relationships among microbial phylum unites. Increasing groundwater depth also changed composition of soil microbiota, reducing the relative abundance of dominant phyla including Proteobacteria and Ascomycota. Increasing groundwater depth led to changes in microbial community characteristics, which are strongly related to alterations in soil multifunctionality. Overall, our results suggest that groundwater depth had a strongly effect on soil microbiota and functionality.
了解地下水位对土壤微生物群和多种土壤功能的影响对于生态恢复和地下水保护的实施至关重要。干旱导致的地下水位上升对土壤微生物群和多功能性的当前影响仍不明确，这阻碍了我们对严重依赖地下水资源的缺水生态系统可持续性的理解。本研究调查了半干旱地区地下水位变化对土壤微生物群和多功能性的影响。研究了三个地下水位水平，每个水平具有不同的土壤质量和土壤湿度。深层地下水处理对微生物群的多样性、网络复杂性以及微生物门类之间的关系产生了负面影响。地下水位上升还改变了土壤微生物群的组成，降低了包括变形菌门和子囊菌门在内的优势门类的相对丰度。地下水位上升导致微生物群落特征发生变化，这与土壤多功能性的改变密切相关。总体而言，我们的结果表明地下水位对土壤微生物群和功能有强烈影响。
