Study On Habitat Quality Simulation And Influencing Factors In Key Land Renovation Areas

Land remediation is an important measure to optimize the structure of land use,promote the protection of arable land and increase the economical and intensive land use.It is also an important means of coordinating social development and protecting land resources and implementing the most stringent land management system.At the same time,Biological measures and engineering measures on the fields,water,roads,forests,villages and other comprehensive renovation,and now our country's land remediation mainly aims to increase the arable land and improve the quality of arable land,the protection of habitat quality and the environment With less concern,so that it is inevitable to disturb or even destroy the habitat in the project area and the surrounding areas during the remediation process.Researching the habitat quality change in the context of land remediation has reference value for the habitat protection in land remediation.Taking the land remediation key area of Pingxiang as an example,this paper analyzes the changes of land use and landscape pattern through the use of land use transfer matrix and fragstats software,and analyzes the quality of habitat before and after land remediation through the habitat quality module of inVEST model Changes,at the same time using SPSS20.0 on the impact of the quality of habitat analysis.That result shows that:1.In the process of land use,the land transfer is active,and more categories are converted into construction land,while the cultivated land area increases but the range is small;the landscape pattern is reflected by landscape indices such as patch shape,degree of fragmentation and landscape diversity,The shape index decreased,and the fractal dimension closer to 1,it shows the plaque is more rules and simple;Decoupling decreased,the degree of spread has an upward trend,which means that the plaques are more concentrated and more agglomerated;Shannon diversity index and Shannon evenness index all showed an increase,which means the ground types are more average and the landscape diversity is higher.Changes in the performance of the landscape index shows that the overall pattern of landscape change after the land remediation is positive.2.The change of habitat quality in the process of land remediation shows that it first increases and then decreases,It shows that disturbances to habitats caused by such measures as earth-shaking construction in the early stage of remediation,which influence the habitat,leading to reduce the habitat quality.and remediation effect of the latter part of the rendezvous,making the habitat has picked up.However,the habitat quality did not exceed the previous period.This shows that the protection of habitats during the remediation efforts are not enough.3.This article starts from the perspective of land remediation project,according to the elements of land leveling,farmland water conservancy,roads and other projects,the indexes system of land area improvement,ditch density increment,road density increment and forest network density increment were selected respectively.Making the township as a boundary,a township in all corresponding types of projects as a sample.According to the three types of samples of agricultural land consolidation,rural construction land consolidation and reserve resource development,the influencing factors of the habitat quality are respectively analyzed.The results shows that the correlation between the elements of farmland water conservancy,road and other works and the quality of habitat in all types of samples,Among them,farmland water conservancy projects and road engineering elements are negatively correlated with the quality of habitats,while other engineering factors are positively correlated with the quality of habitats,However,the influence of each engineering element in the type sample is different,Among them,the density of farmland water conservancy engineering elements in the sample of agricultural land consolidation has the greatest impact on the quality of the habitat;Road construction elements in rural construction land consolidation samples Road density has the greatest impact on the quality of the habitat;The other project elements in the reserve resource development sample have the greatest impact on the habitat quality.