Soil nitrogen loss reduces food web energy flow via nematode community simplification during wild fruit forest degradation in the Tianshan Mountains, China - Yulu Zhang; Dong Cui; Zhicheng Jiang; Haijun Yang; Zezheng Liu; Junqi Liu; Wenxin Liu; Yunhao Wu; Jinfeng Guo; Yaxin Han; Zhicong Zhang (Applied Soil Ecology, 2026)