Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (10): 1289-1298.

### Regional Differentiation of Mountainous Ecosystem Services and Ecological Compensation Thresholds in the Upstream of Minjiang River

FAN Min

1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China
• Received:2019-03-18 Online:2019-10-25 Published:2019-10-23

Abstract: The supply side and demand side of ecosystem services are the hot issues and frontier domains of geo-science research, and also the characterization of man-land relationship. The upstream of Minjiang River belongs to special physical geographical zones and fragile areas of Hengduan Mountains. The vertical differentiation of geographical environment, diversity of nationality, and fusion of economic and social environment impact the imbalance between the supply side and demand side of ecosystem services, and further create spatial location characteristics of ecosystem service compensation threshold. Focusing on the coexistence of dislocation on low economic density with high ecological surplus located at high semi-mountainous area and high economic density with high ecological deficit located at the upstream of Minjiang River, this research primarily explored regional differentiation laws on ecosystem functions as well as ecosystem services and the threshold of ecological compensation. It povides theoretical basis for ecological civilization in this study site. The results indicate that the regional differences of ecosystem services and ecological compensations were obvious in the upstream of Minjiang River during 1995-2010. The detailed information is as following:the ecosystem service values of grassland and cropland increased by 3.70×109 and 0.62×109 yuan in 2010 compared to those in 1995, respectively. However, the ecosystem service value of woodland decreased by 13.17×109 yuan in 2010 compared to that in 1995. The total ecosystem service value decreased due to the decreasing magnitude of ecosystem service value of woodland was larger than the increasing magnitude of ecosystem service values of grassland and cropland. Woodland and grassland contributed a lot to total ecosystem service value in the upstream of Minjiang River, and the ecosystem service values in eastern area were larger than those in western area from spatial distribution maps of the ecosystem service value. The positive values of ecological compensation based on population concentrated in the northwest and east of the upstream of Minjiang River, while the negative values concentrated in the vicinity of Heishui, Songpan and Lixian counties. The positive values of ecological compensation based on the village area concentrated in Songpan and Heishui counties, while the negative values concentrated near Maoxian and Wenchuan counties. The areas whose compreshensively corrected ecological compensations were negative concentrated in the northwest of the study area, while the areas with positive compreshensively corrected ecological compensations concentrated in Heishui, Songpan and Lixian counties. Theses achievements provide the foundation for a deeper appreciation of coupling relationship between ecosystem service and human welfare, and a watershed-scale solution act for rational allocating the ecological compensation in Tibetan and Qiang autonomous region.

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