A novel method for achieving ecological indicator based on vertical soil bacterial communities coupled with machine learning: A case study of a typical tropical site in China - Ying Chen; Yajing Qu; Wenhao Zhao; Xiaochen Wu; Anfu Yang; Yulin Hu; Haiyan Chen; Meiying Wang; Yuxuan Cai; Jin Ma; Fengchang Wu (Journal of Hazardous Materials, 2025)