Abstract:

Ecological sensitivity is an important indicator for evaluating regional ecological environmental issues and implementing ecological function zoning， which can provide important basis for regional ecological restoration and optimization management. This paper takes Hexi region as an example. First， aiming at ecological problems such as Desertification， water and soil loss， salinization， and habitat quality， the spatial distance index model is coupled to build an evaluation system of terrestrial ecological sensitivity. Secondly， the grid coding method is used to analyze the fluctuation intensity and trend of terrestrial ecological sensitivity in Hexi region， and the main driving factors in the evolution process of terrestrial ecological sensitivity are identified with geographical detectors； Finally， ecological governance zoning is carried out based on the spatiotemporal evolution characteristics of terrestrial ecological sensitivity. The results indicate that the sensitivity of terrestrial ecology in the Hexi region has significant spatial differentiation， showing a distribution pattern of high in the northwest and low in the southeast； The ecologically sensitive and stable area dominates， accounting for 46.54% of the total area； The sensitivity of habitat quality has the strongest explanatory power on the sensitivity of terrestrial ecology in the Hexi region； Based on the above characteristics， the Hexi region can be divided into four ecological zones： optimized governance zone， controlled governance zone， long-term governance zone， and comprehensive governance zone. The proportion of the zone area is 32.08%， 27.80%， 11.30%， and 28.82%， respectively. It is recommended to implement different ecological governance strategies for different zone characteristics.

Key words: ecological sensitivity, zone governance, spatial distance model, Hexi region