Warming and precipitation change regulate soil multifunctionality through multitrophic community assembly and biodiversity

Community assembly processes govern species diversity and composition, which may indirectly influence ecosystem multifunctionality. Compared to single-trophic diversity, multitrophic diversity is considered to play a greater role in influencing ecosystem multifunctionality. However, the knowledge of how multitrophic community assembly affects soil multifunctionality through species diversity regulation remains limited, particularly under climate change.Using a long-term field experiment established in 2017 with warming and alter precipitation, we surveyed species diversity and composition across bacteria, fungi, nematodes, and plants. We analyzed multitrophic community assembly processes and quantified soil multifunctionality and its spatial turnover. Our objectives were to elucidate mechanisms through which warming and alter precipitation affect multitrophic diversity and subsequently affect soil multifunctionality.