| In this study,the land use,wetland pattern change and ecosystem services of urban agglomeration in central Yunnan were analyzed by landscape ecology method,and the change of wetland landscape pattern in the region was taken as the main driving force to study the change mechanism of regional human well-being.Using ecological theory and GIS analysis method,using Arcgis 10.4,SPSS 20 and other software,this paper analyzed and studied the dynamic change of land use in the urban agglomeration of central Yunnan from 2000 to 2015,and made a comparative study on the land use situation of each city and state in the urban agglomeration of central Yunnan,and explored the dynamic change characteristics of wetland landscape pattern in the study area,each city and state,at the same time,discussed the dynamic change characteristics of wetland landscape pattern of each city and state.The dynamic evolution of regional ecosystem services of urban agglomerations in central Yunnan from 2000 to 2015.The impact of dynamic evolution of land use and wetland landscape pattern on ecosystem services in urban agglomerations in central Yunnan under the background of urbanization was analyzed in depth.Through the study on the dynamic change of land use,wetland pattern and ecosystem service function of urban agglomeration in central Yunnan,the following results are obtained:(1)The area of cultivated land and grassland decreased while the area of urban and rural construction land,woodland and wetland increased in the study areaFrom 2000 to 2015,the level of urbanization has reached a rapid increase of nearly 20%,but the cultivated land and grassland land in the region have been affected by urbanization and are decreasing.In the urban agglomeration of central Yunnan,cultivated land decreased by 1.71%,grassland area decreased by 0.52%,urban and rural construction land area increased by 26.23%,wetland area increased by 1.87%,and forest land area increased by 0.13%.(2)In wetland types,the area of reservoir ponds and beaches increased while the area of rivers,lakes and marshes decreasedFrom 2000 to 2015,the total area of regional wetlands showed a gradual upward trend,which was positively correlated with the regional annual precipitation.In wetlands,reservoir ponds increased by 8.08%,beach area increased by 17.77%,river canal area decreased by 1.92%,Lake area decreased by 1.79%,and marsh area decreased by 9.81%.Urbanization process had a negative impact on regional river canals,lakes and marshes,and the area of urban and rural construction land increased.It also stresses rivers,lakes and swamps,and accelerates the rise of regional reservoirs and ponds.There was no significant correlation between the change of cultivated land area and wetland.(3)The value of ecosystem services in the study area declined year by yearFrom 2000 to 2015,the total value of ecosystem services in the study area decreased by 0.072%;while the value of ecosystem services in woodland,wetland and urban and rural construction land increased by 0.13%,1.87%,26.23%,respectively;the value of ecosystem services in cultivated land decreased by 1.71%,and the total value of ecosystem services in the study area declined rapidly due to the effective protection of wetland and woodland.The degree is not serious,the future development of the region should focus on wetlands and woodlands,while strengthening the protection of cultivated land.(4)Urbanization is significantly correlated with urban and rural construction,wetland and unused land in the study areaUrbanization in central Yunnan is positively correlated with wetlands,urban and rural construction land,and negatively correlated with unused land.However,due to the downward trend of rivers,lakes and marshes in wetlands,the future trend of wetlands will dominate the value of ecosystem services in the region.(5)The ecosystem services of lakes,reservoirs,ponds,beaches,marshes and research areas are closely relatedAmong all kinds of wetland types,lakes and reservoirs contribute most to ecosystem services.The dynamic change law of lakes is basically consistent with the ecosystem service value of the urban agglomeration in central Yunnan,but the area of other types of wetlands has changed much more.From 2000 to 2015,the area of beaches has increased greatly and the area of swamps has decreased greatly.In summary,during the 15 years from 2000 to 2015,the area of cultivated land and grassland decreased while the area of urban and rural construction land,woodland and wetland increased.In the aspect of wetland landscape pattern,the area of reservoirs,ponds and beaches increased while the value of river,lake and swamp decreased.The level of urbanization development,urban and rural construction and wetland declined year by year.Land use was significantly positively correlated,and negatively correlated with unused land.In Wetland Land land,lakes,reservoirs,ponds,beaches,marshes and research areas had a greater relationship with ecosystem services.The academic significance of this study lies in:by selecting the scale of urban agglomeration,studying the dynamic change process of land use,wetland landscape pattern and ecosystem services in the region for 15 years,enriching the application field of landscape ecology scale-pattern-process theory,stripping the influence of other landscape elements,and extracting the characteristics of land use and landscape pattern that restrict regional ecosystem services;The research findings can also provide reference for regional and urban sustainable development,and have practical significance. |
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