| With the rapid development of economy in jiangxi province and the speeding up of urbanization,the human growing demand for land resources,land resources,ecological environment problems emerging function,structure and layout of landscape pattern will also be hit,will affect the local ecological environment,lead to ecosystem services function and value in jiangxi province began to degenerate,Then seriously affect the sustainable development of local society and economy.In order to achieve the protection of the ecological environment and social economy harmonious development of the two,it is necessary to deal with the relationship between the good man and nature,so we need to adjust land use structure in jiangxi province,the optimized landscape pattern of land use,the research of land use in jiangxi province the correlation between landscape pattern and ecological system,increasing area ecosystem service value.This paper takes Jiangxi Province as the research object,adopts five periods of land use data in 2000,2005,2010,2015 and 2020,uses Arc GIS software and Geo Da software to preprocess the research data,and then combines the equivalent factor method,natural breakpoint method and spatial autocorrelation analysis method.Changes analysis of landscape pattern index in the study area and the changes of time and space of ESV,landscape pattern and the relationship between the land ecosystem service value,analyses the inner link between the two,the development of science make space planning,adjusting land use structure,provide better decision-making basis,research has important theoretical and realistic significance.The results showed that:(1)Among all land use types in Jiangxi Province in the past 20 years,the area of cultivated land,woodland,grassland and unused land all showed negative growth,and the area of woodland decreased the most,with a total of 1321.123km~2,followed by the area of cultivated land decreased by 1234.684km~2,and the area of grassland decreased the least,with a total of 32.657km~2.The area of construction land increased the fastest,with a total of2641.342km~2,showing a positive growth trend.From the perspective of land use dynamic attitude and land use degree,the single dynamic attitude of construction land is the largest,indicating that construction land has changed the most in recent 20 years.The comprehensive index of land use degree of forest land and cultivated land was larger,while the change range of other land types was smaller,which indicated that the scale of land use degree was increasing.The land use types in Jiangxi Province were changing dramatically,especially after 2015,and the change speed was obvious.From the perspective of land use transfer,the area conversion of various land use types in Jiangxi Province was more frequent during2000-2020,mainly concentrated in the provincial capital cities and major urban areas,especially the exchange of construction land area was most obvious.(2)From the level of patch type analysis of landscape pattern in Jiangxi Province,the results showed that the number and density of patches of woodland,cultivated land,grassland and unused land showed a decreasing trend during 2000-2020,while that of construction land and water area showed an increasing trend.The connectivity of landscape is poor,the degree of landscape fragmentation is aggravated,and the spatial structure of landscape pattern in different places is declining.Due to the increase of population,the increase of social economy and the expansion of urbanization,a large amount of construction land is needed,which makes the area of woodland,arable land,grassland and unused land around the city decrease greatly.The degree of aggregation between patches and the connectivity between patches are decreasing,the surrounding ecological environment is destroyed,and the stability of the ecosystem decreases,which is not conducive to the sustainable development of ecological economy.Based on the index change of landscape level in Jiangxi Province,the results show that the number and density of patches show an increasing trend during 2000-2020,which indicates that the spatial fragmentation of landscape pattern in the study area is greater,and the spatial heterogeneity also shows an increasing trend.The maximum patch index and sub-dimensional index showed a decreasing trend,which indicated that the acceleration of urbanization and the enhancement of human activities in recent years had reduced the abundance of regional ecological species and destroyed the balance and stability of the natural ecological environment.(3)The total ecosystem service value(ESV)in Jiangxi Province decreased by 1.723billion yuan during the 20 years,and the decrease of forest ecosystem service value was the main reason for the decrease.Based on the analysis of the spatial correlation of ecosystem service value in Jiangxi Province,from the perspective of global autocorrelation,the Moran,I index showed a decreasing trend from 2000 to 2020.The calculated results were verified by Z-value test,which proved that Moran,I was significantly effective,indicating that the whole ESV of Jiangxi Province presented a significant spatial aggregation.According to the analysis of local autocorrelation,the high-high agglomeration counties are mainly distributed in southern Jiangxi,and the low-low agglomeration counties are mainly distributed in northern and central Jiangxi.The distribution of cold and hot spots tends to be stable.Therefore,from the perspective of the distribution of high and low value of the entire ecosystem service value,with the acceleration of urbanization,the areas with low value of ecosystem service value will develop along with the development of centralized cities,while the areas with high value are still in the areas with rich natural resources.(4)The correlation analysis method was used to quantitatively analyze the relationship between landscape pattern and ecosystem service value,and the two showed a strong correlation.The interaction between landscape pattern and ecosystem service value is interlaced and complex,rather than a simple linear correlation.In order to improve the value of regional ecosystem services,suggestions on optimizing landscape pattern,adjusting land use pattern and structure,strengthening the construction of ecological source area,giving full play to regional advantages,adjusting industrial structure and increasing ecological value were put forward.To promote and implement sustainable economic policies aimed at protecting the environment,to realize the circular ecological economic model of land landscape,ecology and economy,and to promote the high-quality development of regional ecological economy. |
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