Landscape Ecological Risk Assessment and Zoingin Wuling Mountain Area
Landscape ecological risk assessment combined with risk zoning,as a comprehensive means of spatial optimal allocation of land resources and ecological resource management decision-making design,provides a new perspective for quantifying regional ecological risk status and proposing corresponding countermeasures.Based on the land use data of 2000,2010 and 2020,the landscapecological risk of Wuling Mountain area was evaluated and partitioned by ArcGIS and Fragstats software.The results are as follows.The average value of landscape ecological risk in Wuling Mountain Area is about 0.07,which is at a low level as a whole,and presents a three-level ladder distribution pattern of west,middle and east.Cultivated land and forest land are the dominant landscapes in Wuling mountain area,and the impervious surface area expands rapidly.The decrease area of landscape ecological risk is concentrated in the west,and the increase area is concentrated in the east.The distribution of landscape ecological risk has obvious aggregation effect,but the aggregation effect is getting weaker and weaker.Based on this,Wuling Mountain is divided into four risk areas and management suggestions are given:high-risk areas focus on restoration,medium-risk areas close hillsides for afforestation,lower-risk areas develop ecotourism,and low-risk areas focus on protection.