Study On The Relationship Between Landscape Pattern Change And Ecosystem Service In Chao Bai River

There is a certain relationship between the landscape pattern and the ecosystem service,and the research of its relationship is widely concerned by the researchers in the related fields.In this paper,the Chaobai River as the research object,made into a landscape map using the remote sensing images,analysis of landscape pattern and its change in 1978-2017 years,while the calculation of soil and water conservation,water conservation,carbon sequestration,air purification,landscape diversity and ecosystem servicevalue,correlation analysis of landscape pattern index and ecosystem service between the two and to make full use of land resources,its ecological function,has important significance to improve the natural environment.The main contents and conclusions of this paper are summarized as follows:(1)Analysis of the landscape pattern of the 1978-2017 years in the Chao Bai River.The remote sensing image is entered into Fragstats,and the landscape pattern index is obtained and the changes of its type and landscape level are analyzed.Six types of land,grassland,arable land,water area,working condition land and unused land are obtained during the study period,and the degree of fragmentation,the degree of rule and the varying degree of quality of the study area are changed.It is found that the fragmentation degree of the whole is slightly reduced,and the morphology tends to be more regular,and it develops towards a more stable direction.(2)Calculation and analysis of ecosystem service of the Chao Bai River.The water conservation of forestland,grassland and cultivated land,soil and water conservation,carbon sequestration,air purification,and landscape diversity ecological functions are calculated.The study found that the ecosystem serviceof forest land is much higher than that of grassland and cultivated land,the second of grassland,and the smallest contribution to cultivated land.Most of the highest values of various ecological functions decreased slightly in 1998 and 2008 in 2017,but slightly increased before the decrease.(3)The analysis of the relationship between landscape pattern and ecosystem service.Spearman correlation coefficient.of SPSS software was applied to test the correlation between landscape pattern index and ecosystem service function.The correlation degree between PAFRAC,CONTAG,SHDI,IJI,ED index and ecosystem service function was analyzed.It is found that there is a certain correlation between landscape pattern and ecosystem service function,and the degree of correlation is different.The correlation between fractal dimension and Shannon diversity index is most related to ecosystem service function,and soil and water conservation is more affected by landscape pattern change.