Colonization ability and uniformity of resources and environmental factors determine biological homogenization of soil protists in human land‐use systems

作者：Zhipeng Li, Huayuan Shangguan, Haifeng Yao, Xiao‐Ru Yang, Yuri Mazei, Biao Zhu, Stefan Scheu, Xin Sun · 发表于：Global Change Biology · 年份：2024 · DOI：10.1111/gcb.17411 · 被引用次数：16 · 研究领域：Microbial Community Ecology and Physiology、Polar Research and Ecology、Soil Carbon and Nitrogen Dynamics

Humans have substantially transformed the global land surface, resulting in the decline in variation in biotic communities across scales, a phenomenon known as "biological homogenization." However, different biota are affected by biological homogenization to varying degrees, but this variation and the underlying mechanisms remain little studied, particularly in soil systems. To address this topic, we used metabarcoding to investigate the biogeography of soil protists and their prey/hosts (prokaryotes, fungi, and meso- and macrofauna) in three human land-use ecosystem types (farmlands, residential areas, and parks) and natural forest ecosystems across subtropical and temperate regions in China. Our results showed that the degree of community homogenization largely differed between taxa and functional groups of soil protists, and was strongly and positively linked to their colonization ability of human land-use systems. Removal analysis showed that the introduction of widespread, generalist taxa (OTUs, operational taxonomic units) rather than the loss of narrow-ranged, specialist OTUs was the major cause of biological homogenization. This increase in generalist OTUs seemingly alleviated the negative impact of land use on specialist taxa, but carried the risk of losing functional diversity. Finally, homogenization of prey/host biota and environmental conditions were also important drivers of biological homogenization in human land-use systems, with their importance being more pr...