Landscape Pattern Simulation And Habitat Quality Assessment In Zhalong Wetland

In recent years,human disturbance activities in the Zhalong Wetland,such as engineering construction,road construction,and human economic activities,have caused great changes in the ecological environment of the wetland,mainly manifested in changes in the landscape pattern.The evolution of the landscape pattern will also cause changes in the service functions of the ecosystem,which may lead to the destruction of the wetland habitat.Based on the changes in landscape pattern and setting of scenes,this paper evaluates the habitat quality of the Zhalong Wetland.There is important scientific significance for the land and ecological planning of the wetland.It can provide theoretical support for the construction of a reasonable ecological pattern and sustainable development of the Zhalong Wetland.The article takes Zhalong Wetland as the research area,focusing on the evaluation and dynamic analysis of the landscape pattern and overall habitat quality in the research area.On the basis of remote sensing image data in 2006 and 2016,through supervision and classification,two phases of landscape type data were obtained.The CLUE-S model method is used to simulate the landscape changes under the natural,development,and ecological protection scenarios in 2026,and the current and future landscape pattern changes are discussed and analyzed.and on this basis,And on this basis,using the Habitat Quality Assessment Module of the In VEST model method to explore the current and overall Habitat Quality evolution law of the Zhalong Wetland under these three scenarios,the results are as follows:(1)Watery wetlands,meadow grasslands and dry wetlands occupy a major position in the Zhalong wetland landscape.The total area accounts for about 74% of the total area,of which watery wetlands account for about 36%.From 2006 to 2016,the area of watery wetlands,bare land,farmland and villages in Zhalong increased,and the area of open water,dry wetlands,and meadow grassland decreased.Among them,the area of meadow grassland and the area of dry wetland decreased the most,with a decrease of 28%and 39% respectively.The distribution pattern of farmland and villages is relatively s Tab.le,and other landscape types are relatively uns Tab.le,and it is easier to change land types.(2)Using Logistic regression analysis,the ROC values of the six landscape types in Zhalong Wetland are all greater than 0.75,indicating that the regression model results are more effective,and the selected 11 driving factors can well explain the landscape pattern of Zhalong Wetland Evolution.(3)The spatial distribution of Zhalong wetland landscape in 2026 under three scenarios: natural scenario,development scenario,and ecological protection scenario:Under the natural scenario,the area of open water,dry wetland,and bare land increased,and the area of open water increased by 38%;farmland and villages have increased but the change is not very obvious;in the simulation results under the development scenario,most of the landscape types are transformed into farmland and villages.watery wetlands also mainly turn into meadow grasslands and dry wetlands.the principle of meadow grasses has been mainly transformed into bare land and the area of bare land has increased;the simulation results of the ecological protection scenario show that there is no significant change in the areas of open water and watery wetlands,and anhydrous wetlands and grasses.The area of meadow grassland has increased,of which dry wetland has increased by 73%,while other landscape types have decreased significantly.(4)The spatial distribution of the habitat quality of wetlands during the period2006-2016 was mainly high in the middle area and low in the periphery.The evaluation of habitat quality based on the In VEST model showed that the overall quality of the study area declined in 2006-2016,and the premium level decreased 11%,the poor level area increased by 7.8%;the habitat quality under the natural scenario in 2026 is basically the same as that in 2016,and the overall habitat quality declines;under the development scenario,as other landscapes turn to farmland increase in area,the area of medium-quality research areas in the region has increased,The area ratio increased by13.3%,and the premium area decreased by 16%.The overall habitat quality of the study area under the ecological protection scenario has been greatly improved compared with2016,and the area of the premium level has increased,reaching 81% of the total area.The poor level dropped by 6.3% from 2016,and the quality of the ecological environment has basically been restored.