Analysis of the evolution of the landscape pattern and drivers of the Cocteau Sea wetlands from 1990 to 2020
To study the dynamic evolution characteristics and driving factors of the landscape pattern of the Cocteau Sea wetlands,five periods of Landsat images(1990,2000,2010,2015 and 2020)were used as the base data to calculate the transfer matrix,dynamic attitude and landscape pattern index to analyze the landscape pattern evolution characteristics and spatial and temporal dynamic changes,and explore the evolution driving forces by combining meteorological and socio-economic data.The results are as follows.(1)From 1990 to 2020,the main characteristics of landscape type trends in the Cocteau Sea wetlands showed a continuous increase in the area of arable land,construction land and unused land,a continuous decrease in the area of grassland,and a fluctuating decrease and increase in the area of woodland and water respectively.(2)From the changes of landscape pattern index,grassland,woodland and unused land were the main landscape types of the Cocteau Sea wetlands;except for woodland,NP,PD and AI of all landscape types were increasing,the degree of landscape fragmentation and dispersion of spatial distribution increased at the level of patch type;the trend of LSI,SHDI and SHEI increased and CONTAG decreased,the landscape richness and diversity increasd and the landscape connectivity and spreading decreased at the level of landscape types.(3)The change of landscape pattern of the Cocteau Sea wetlands was affected by both climatic factors and human activities.Along with the rapid economic development,especially after 2005,human activities gradually became the main driving factor of the change of wetland landscape pattern.
landscape patternsspatial and temporal variabilitydriversCocteau Sea wetlands
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