Abstract

ABSTRACT Land-use/land-cover change (LUCC) in China's seven major basins (SMBs) had a significant impact on the ecosystems, resulting in increasingly prominent contradictions between ecological protection and economic benefits in provinces located upstream and downstream. Therefore, it is urgent to establish inter-basin ecological compensation (EC) mechanisms between provinces in the SMB. Based on five periods of LUCC from 1980 to 2020, the equivalent factor method was applied to evaluate the ecosystem service value (ESV) of the LUCC, and ecological compensation priority sequence (ECPS), horizontal EC (HEC), and vertical EC (VEC) were determined. We found that (1) the total ESV fell from 11,522 billion yuan (BY) in 1980 to 11,375 BY in 2020. (2) The elasticity index indicated that 1% of LUCC in the SMB resulted in a change of 0.34% in ESV. (3) The province with the highest ECPS was Xizang, with higher ECPS in the SMB southwest and northeast regions. (4) The total VEC was 357.5 BY, with Songhua River Basin and Neimenggu having the highest VEC of 134.13 and 97.13 BY, respectively. (5) The total HEC was 103.78 BY. The maximum HEC in the Songhua River Basin was 31.12 BY. Heilongjiang undertook the highest HEC, 31.09 BY.

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