Continental‐scale plant invasions reshuffle the soil microbiome of blue carbon ecosystems

作者：Gui‐Feng Gao, Huan Li, Yu Shi, Teng Yang, Chang‐Hao Gao, Kunkun Fan, Yihui Zhang, Yong‐Guan Zhu, Manuel Delgado‐Baquerizo, Hai‐Lei Zheng, Haiyan Chu · 发表于：Global Change Biology · 年份：2022 · DOI：10.1111/gcb.16211 · 被引用次数：69 · 研究领域：Microbial Community Ecology and Physiology、Coastal wetland ecosystem dynamics、Gut microbiota and health

Theory and experiments support that plant invasions largely impact aboveground biodiversity and function. Yet, much less is known on the influence of plant invasions on the structure and function of the soil microbiome of coastal wetlands, one of the largest major reservoirs of biodiversity and carbon on Earth. We studied the continental-scale invasion of Spartina alterniflora across 2451 km of Chinese coastlines as our model-system and found that S. alterniflora invasion can largely influence the soil microbiome (across six depths from 0 to 100 cm), compared with the most common microhabitat found before invasion (mudflats, Mud). In detail, S. alterniflora invasion was not only positively associated with bacterial richness but also resulted in important biotic homogenization of bacterial communities, suggesting that plant invasion can lead to important continental scale trade-offs in the soil microbiome. We found that plant invasion changed the community composition of soil bacterial communities across the soil profile. Moreover, the bacterial communities associated with S. alterniflora invasions where less responsive to climatic changes than those in native Mud microhabitats, suggesting that these new microbial communities might become more dominant under climate change. Plant invasion also resulted in important reductions in the complexity and stability of microbial networks, decoupling the associations between microbes and carbon pools. Taken together, our results indicat...