Research On Landscape Pattern Changes And Ecological Security Pattern Construction In The Core Area Of Wabu Lake Basin

Wabu Lake belongs to Huainan City and is geographically located in the southwest of Huainan City,in the middle of Anhui Province,close to the south bank of the middle reaches of the Huai River.It is the largest lake in the Huai River Basin in Anhui Province with a total area of 4193km2.And it also has flood control,water supply and leisure travel and other functions.In recent years,people's production and living activities have caused certain damages to the ecosystem in the core area of Wabu Lake Basin.There have been phenomena such as infringement of the shoreline and reclaiming land from the lake,which has fragmented the integrity of the lake and accelerated the aging of the lake while also destroying the stability of the lake's own ecosystem.How to coordinate the ecological protection and utilization of the core area of the Wabu Lake Basin are the main problems currently facing.The optimization of the ecological security pattern can ensure the good operation of ecosystem services,maintain the stability of the ecosystem,and restore the original ecological functions of the ecosystem.It is an important way to solve ecological environmental problems and ensure regional ecological security.In the context of the concept of ecological civilization,building a regional ecological security pattern is of great significance for regulating the ecological pattern of the core area of the Wabu Lake basin,optimizing the use of land resources,and promoting regional sustainable development.Firstly,the article clarifies the related concepts of landscape pattern,landscape ecological security evaluation,ecological security pattern,combs the research progress at home and abroad,summarizes the development process of foreign landscape ecology,and briefly summarizes the main research on landscape ecology by Chinese scholars.At the same time,the main content and system of landscape ecological security evaluation and the main methods of ecological security pattern construction are summarized.Through literature and case studies,we will find a suitable technical path for the evaluation of landscape ecological security in the core area of the wabu Lake Basin,the construction method of the ecological pattern,and the optimization strategy.Secondly,select the remote sensing images of the third phase of the study area from2000 to 2018,and divide the land use landscape types of the study area into six types of cultivated land,forest land,grassland,water,construction land,and other land according to the land use classification standards,and use the images for land use Calculate the land transfer situation after classification.Using the principles of landscape ecology,select the relevant landscape index to analyze the evolution characteristics of the landscape pattern from the patch type and landscape level in the study area;based on the analysis of the landscape pattern evolution,select the landscape loss degree,landscape disturbance degree and other related indexes to construct the evaluation model The ecological security level is evaluated,and the ecological security change law and distribution in the study area are obtained,which lays the foundation for the construction of the ecological security pattern in the core area of the Wabu Lake basin.Thirdly,build an ecological security pattern in the core area of the Wabu Lake basin.From the two levels of morphological spatial pattern and ecological protection area,the ecological source area is analyzed and extracted and superimposed to obtain the comprehensive ecological source area.Seven resistance factors,including elevation,slope,and land use intensity,were selected from the aspects of ecological attributes and ecological disturbances to construct a comprehensive resistance surface.On this basis,the least cumulative resistance model is used to extract the ecological corridors between ecological sources,and the ecological nodes in the study area are identified with the help of hydrological analysis.From the perspective of network structure,select the network and nodes in the ecological pattern generated by the evaluation of network closure,line point rate,and network connectivity indicators,and optimize the ecological corridors and nodes according to the evaluation results,and finally generate the core of Wabu Lake basin Regional ecological security pattern.Fourthly,based on the results of the construction of the ecological security pattern in the core area of the Wabu Lake Basin,core ecological land such as river water systems and natural woodlands are used as important ecological source patches to form a composite ecological corridor of river water system corridors and road corridors.Eventually,an ecological security pattern composed of ecological sources,corridors,and nodes will be formed.In the ecological security protection strategy,firstly,corresponding suggestions are made to the ecological security pattern from the perspective of protecting the ecological source,strengthening the connection of ecological corridors,and improving the function of ecological nodes;Secondly,in the protection measures of the ecological pattern,methods and measures to strengthen the supervision of ecological safety by management departments,promote ecological sustainable land use,and promote the construction of ecological safety barriers are proposed.Figure[20] table[22] reference[92]...