Study On Spatio-temporal Variation Of Habitat Quality In Green Core Area Of Changsha-zhuzhou-xiangtan Based On In VEST Model

In the process of urbanization,the use of urban land in our country has undergone drastic changes,and different forms of land use have changed rapidly,accompanied by a large number of construction land,at the same time,with the destruction of biological habitat and the reduction of living space,the ecological environment of towns is deteriorating.As the largest urban green core in the world,the chang-zhu-tan green core area occupies an important strategic position,promoting the harmonious development between human and nature plays a key role.Based on the remote sensing image data of 2000,2010 and 2020 from the perspective of land use change,based on InVEST model,the quantitative assessment of the habitat quality and the degree of habitat degradation was carried out,and the suggestions and suggestions for the eco-environmental protection were put forward.Specific findings are as follows:(1)Analysis of land use change in Changzhutan Greenheart area from 2000 to 2020.The area of cultivated land,forest land,grassland and water area decreased year by year,and the area of construction land increased continuously The farmland,woodland and grassland in the green core area showed negative dynamic change,while the construction land showed positive dynamic change The total land transfer was from arable land and forest land to construction land,while the change of other land types was small,and the increase of construction land was mainly distributed near the Changsha-Zhuzhou-Xiangtan Intercity Railway stations.(2)Analysis of habitat quality in green core area of changsha-zhuzhou-xiangtan from 2000 to 2020.Medium and excellent habitat quality were the main habitat quality,but the proportion of poor habitat quality was small,but it increased year by year,and the increasing range was obvious The statistical data showed that the habitat transfer from 2000 to 2020 mainly showed the transformation from good,excellent and medium habitat to poor and poor habitat quality The habitat change area is mainly located in the Twilight Zone and Zhaoshan Zone of Changzhutan Greenheart Zone.(3)Analysis of habitat degradation degree in green core area of changzhutan from 2000 to 2020.According to the model,the degradation degree of the habitat is not obvious during the past 20 years,the proportion of the area of each degradation degree is basically unchanged,and the fluctuation rate is not more than 0.5%,indicating that the biodiversity of the whole study area is well maintained,the habitat quality is stable.The green core area of chang-zhu-tan is a natural isolation zone for Greater Changsha Metropolitan Region.The simulated assessment of habitat quality in the green core area of changsha-zhuzhou-xiangtan can provide useful reference for the construction of Greater Changsha Metropolitan Region Ecological Civilization and sustainable development.