Dynamic Study of Landscape Pattern Index in Chongli District Over the Past 40 Years Based on Optimal Granularity
Landscape pattern is a comprehensive display of the imbalance and complexity of landscape differences in spatial distribution from the perspectives of spatial architecture and design,both of which have obvious scale dependence,also known as scale effect.Understanding and exploring scale effects is the core of exploring land-scape structural characteristics and ecological process information.At present,research on the scale effects of landscape patterns started earlier abroad,while domestic research is relatively lagging behind.In these studies,most researchers have focused on exploring the relationship between landscape patterns at different scales.Taking the Chongli area as the research object and selecting China's multi period land use/land cover remote sensing mo-nitoring data usage database as the research data background,this study used ArcGIS and Frag Stats software to systematically explore the impact of landscape index changes with granularity in the Chongli area in 2018,and de-termined the optimal analysis granularity.On this basis,this study deeply analyzed the landscape structure charac-teristics and patterns of Chongli District in the past 40 years.The research results indicate that the optimal analysis granularity for forest landscape in Chongli District is 50m.At the same time,the distribution of various landscape elements shows uneven characteristics,with low degree of agglomeration between patches of different landscape types,scattered and complex spatial distribution,and high degree of fragmentation.
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