TY - Journal of Changjiang River Scientific Research Institute A1 - SHEN Meng-shu, ZHENG Hang, LIU Yue-yi, CHEN Jin, YIN Zheng-jie T1 - Spatio-temporal Changes of Ecological Service Value Based on Improved Equivalent Factor Method: Case Study on Yangtze River Basin Y1 - 2023-09-01 JF - Journal of Changjiang River Scientific Research Institute JO - Journal of Changjiang River Scientific Research Institute SP - 47 EP - 54 VL - 40 IS - 9 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20220264 ER -