Soil microbial network complexity predicts soil multifunctionality better than soil microbial diversity during grassland-farmland-shrubland conversion on the Qinghai-Tibetan Plateau

作者：Yuanming Xiao, Juan Wang, Bo Wang, Bo Fan, Guoying Zhou · 发表于：Agriculture Ecosystems & Environment · 年份：2024 · DOI：10.1016/j.agee.2024.109356 · 被引用次数：75 · 研究领域：Soil Carbon and Nitrogen Dynamics、Microbial Community Ecology and Physiology、Gut microbiota and health

Land-use changes have widespread impacts on terrestrial ecosystems. However, few studies have focused on the responses of soil environmental factors, soil microbial properties, and links between primary productivity, soil microbes, and soil multifunctionality during land-use change in the ecologically sensitive alpine areas on the Qinghai-Tibetan Plateau. In this study, we evaluated the effects of land-use changes from alpine grassland to farmland to shrubland on soil factors and soil microbial characteristics and investigated the associations between aboveground biomass, soil microbial diversity, network complexity, and soil multifunctionality in the Qinghai Lake Basin. The results showed that soil environmental factors and microbial community composition exhibited patterns of gradual recovery toward natural grassland along with the conversion of farmland to shrubland, and soil phosphorus content played a regulatory role in soil microbial restoration along with the conversion of land-use. Furthermore, we found that the recovery of soil microbial co-occurrence network complexity would require a longer time than that of microbial community composition and functional taxa after the conversion of farmland to shrubland. Importantly, we showed that network complexity is an important microbial property mediating the association between primary productivity and soil multifunctionality during land-use changes. These findings address the gap in our understanding of farmland during lan...