Integrating social-ecological system into watershed ecosystem services management: A case study of the Jialing River Basin, China

A severe decline in ecosystem services (ES) has accompanied the rapid development of human societies. There is a growing interest in considering ES management from a systemic and integrated perspective. Yet, researchers still need to explore effective ways to integrate human and natural systems for strengthening ES. This study proposes an integrating framework that connects the concept of social-ecological system (SES) with ES. We utilize land use types as indicators of basic SES structure and employ the InVEST model to evaluate typical ES in the Jialing River Basin (JRB). By analyzing spatial and temporal characteristics of SES and multiple typical ES, we investigate how ES is related to different SES types. The results reveal that: (1) from 1980 to 2020, the SES of the JRB underwent significant transformations, including a decrease in cropland areas, while construction land and forestland areas increased. Especially, construction land SES experienced an increase as high as 212.53%. (2) Regarding ES, water yield (WY) increased while soil conservation (SC), carbon storage (CS), and habitat quality (HQ) decreased. (3) The relationship analysis demonstrated disparities in levels of ES across various SES types. Construction land SES exhibited the highest average WY but lower SC, CS, and HQ values compared to forestland which had higher average SC, CS, and HQ instead. These findings imply that regional ES will be positively or negatively affected by transformation within SES. In the long run, it is crucial to synthesize both the characteristics of SES and functional benefits provided by ES in the JRB, then control the favorable transformations within SES to enhance a sustainable supply of ES. This study provides a novel methodology for connecting SES and ES comprehensively with new perspectives that will be beneficial for building regional SES management and ES enhancement.