In addition to supporting plant productivity and nutrient cycling, arbuscular mycorrhizal (AM) fungi contribute to multiple functions within terrestrial ecosystems. However, as ecosystems face increasing temperatures and changes in precipitation, these factors may affect how AM fungi interact with ecosystem multifunctionality. Here, we investigated how warming and precipitation changes affected plant and AM fungal communities, as well as ecosystem multifunctionality in a field experiment in an alpine meadow on the eastern Tibetan Plateau that had warming and precipitation change (40% increase or decrease) manipulated experimentally from 2017. Less AM fungal diversity and evenness resulted from warming combined with increased precipitation. Increased precipitation had a significant negative indirect effect on ecosystem multifunctionality through its direct effect on grass biomass and then on AM fungal community composition. Both warming and precipitation had a positive indirect effect on ecosystem multifunctionality through their direct negative effect on AM fungal diversity and positive effect on soil moisture. We conclude that alterations in the species diversity and community composition of AM fungi due to warming and precipitation change mediate ecosystem multifunctionality. Warmer, humid conditions contribute to higher ecosystem multifunctionality, driven by climate change-induced interactions between plants and AM fungi.

中文翻译：

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丛枝菌根真菌与气候温暖、降水量多变的高寒草甸多功能性相关


除了支持植物生产力和养分循环之外，丛枝菌根（AM）真菌还有助于陆地生态系统的多种功能。然而，随着生态系统面临气温升高和降水变化，这些因素可能会影响 AM 真菌与生态系统多功能性的相互作用。在这里，我们在青藏高原东部的高寒草甸进行了一项田间实验，研究了变暖和降水变化如何影响植物和 AM 真菌群落以及生态系统的多功能性，该试验通过实验操纵了变暖和降水变化（增加或减少 40%）。 2017 年。气候变暖和降水增加导致 AM 真菌多样性和均匀度降低。降水量增加通过直接影响草生物量进而影响 AM 真菌群落组成，对生态系统多功能性产生显着的负面间接影响。变暖和降水通过对 AM 真菌多样性的直接负面影响和对土壤水分的正面影响，对生态系统的多功能性产生积极的间接影响。我们得出的结论是，由于变暖和降水变化导致 AM 真菌物种多样性和群落组成的变化介导了生态系统的多功能性。在气候变化引起的植物和 AM 真菌之间相互作用的推动下，温暖、潮湿的条件有助于提高生态系统的多功能性。