Community response of arbuscular mycorrhizal fungi to extreme drought in a cold-temperate grassland

文献类型： 外文期刊

第一作者： Fu, Wei

作者： Fu, Wei;Chen, Baodong;Hao, Zhipeng;Wu, Hui;Zhao, Aihua;Fu, Wei;Chen, Baodong;Ma, Wang;Wu, Hui;Zhao, Aihua;Han, Xingguo;Rillig, Matthias C.;Rillig, Matthias C.;Jansa, Jan;Ma, Wang;Luo, Wentao;Han, Xingguo;Xu, Chong;Wu, Honghui;Xu, Chong;Yu, Qiang;Han, Xingguo

作者机构：

关键词： arbuscular mycorrhiza; belowground biodiversity; climate change; community interactions; environmental filtering; mutualism; species coexistence

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.152； 五年影响因子：10.476 ）

ISSN： 0028-646X

年卷期：

页码：

收录情况： SCI

摘要： Climate extremes pose enormous threats to natural ecosystems. Arbuscular mycorrhizal (AM) fungi are key plant symbionts that can affect plant community dynamics and ecosystem stability. However, knowledge about how AM fungal communities respond to climate extremes in natural ecosystems remains elusive. Based on a grassland extreme drought experiment in Inner Mongolia, we investigated the response of AM fungal communities to extreme drought in association with plant communities. The experiment simulated two types of extreme drought (chronic/intense) of once-in-20-year occurrence. AM fungal richness and community composition exhibited high sensitivity to extreme drought and were more sensitive to intense drought than chronic drought. This community sensitivity (i.e. decline in richness and shifts in community composition) of AM fungi can be jointly explained by soil moisture, plant richness, and aboveground productivity. Notably, the robustness of the plant-AM fungal community co-response increased with drought intensity. Our results indicate that AM fungal communities are sensitive to climate extremes, and we propose that the plant community mediates AM fungal community responses. Given the ubiquitous nature of AM associations, their climate sensitivity may have profound consequences on plant communities and ecosystem stability under climate change.

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