Nature CommunicationsShifts in precipitation regimes exacerbate global inequality in grassland nitrogen cyclesMiao ZhengJinglan CuiXiaoxi WangXiuming ZhangZhongrui XieRuoxi ZhangXinpeng XuBaojing Gu2025-08-23Full textDOI https://doi.org/10.1038/s41467-025-63206-7