Warming and increased precipitation synergy undermines soil multifunctionality through enhanced bacterial–fungal competition in semi-arid grasslands - Xiting Li; Jiayin Shao; Siyi Li; Yuxin Wang; Lucas P. Canisares; Yuanjun Zhu; Zhouping Shangguan; Lei Deng; Weiming Yan; Yangquanwei Zhong (Soil Ecology Letters, 2026)