Ecosystem Services Evaluation Base On The InVEST Model In Dengkou County

Ecosystem services evaluation can help people understanding the potential of ecosystems and achieving scientific development and utilization.The ecosystem service evaluation and its related research have become hot topic in international geology and ecology.Using various material quality models to assess ecosystem services is the main way to assess ecosystem services in abroad,China's various types of material quality model also showed a clear upward trend,In recent years.Based on the InVEST model,using remote sensing and the second national land survey update data,analysis of land use,evaluation carbon storage,soil conservation,water production in Inner Mongolia Bayannaoer Dengkou County,and identified the spatial relationship,analyzed the relationship with various environmental factors,found the trade-offs or synergies relationship.Which provide the basis for the assessment and management of ecosystem services in western Inner Mongolia.The main results are as follows:(1)The total area of Dengkou is 367627hm2,the main land is natural grassland(26.56%),bare land(17.98%),sand(17.12%),irrigated land(14.79%).(2)In 2015,the carbon storage capacity of Dengkou was 7.47×107kg,the average carbon density was 20.30g·m-2,mainly distributed in natural pasture(29.61%),sand(28.25%),bare land(18.14%);soil retention was 1.97×107t,the average unit soil rention was 5.45kg·m-2,concentrated in the bare land(94.07%);water production is 1.10×107m3,the average unit area of water production is 3.00mm,mainly distributed in natural pasture(28.39%),bare land(24.78%),sand(20.16%).(3)The hot spots of carbon storage service distribute in the northwest,central and southwest regions;the hot spots of soil conservation service area are not obvious,sporadic distribution in the northwest region;The hot spots of water production services are distributed in the central,western and southwestern regions,but the hotspot area is smaller.(4)The carbon storage service showed a significant correlation with soil-related environmental factors.Soil conservation services showed significant correlation with elevation-related environmental factors.Water supply showed a significant correlation with vegetation coverage and soil moisture content.(5)Soil conservation services with carbon storage services,soil conservation services with water production services are synergistic,carbon storage services with water production services are trade-offs.