SPATIOTEMPORAL CHANGE OF LANDSCAPE ELASTICITY IN YANCHENG COASTAL WETLAND OF CHINA

Taking Yancheng coastal wetland of China as the case, and using remote sensing images in 1997, 2007 and 2017 as the data sources, the spatial-temporal changes characteristics of landscape elasticity (LE) were analyzed from three dimensions of ecosystem service value (ESV), ecological vulnerability (EV) and human disturbance (H). From 1997 to 2017, Yancheng coastal wetland landscape structure showed a trend of increasing proportion of aquaculture ponds and construction land area, while decreasing proportion of natural wetland area The total ESV decreased first and then increased, the average ESV per unit area in 1997, 2007 and 2017 were 5.23 x 10(4) USD center dot hm(-2), 4.28 x 10(4) USD center dot hm(-2), 5.95 x 10(4) USD center dot hm(-2), respectively. The average EV decreased from 0.182 to 0.170 during 1997 to 2017. The average H increased from 0.175 to 0.198 during 1997 to 2017. In terms of spatial differentiation, the ESV, the EV and the H all showed the characteristics of land-sea differences. The average LE increased from 0.263 in 1997 to 0.914 in 2017, showing a downward trend from land to sea and the southern region was better than the northern region. This study can provide reference for the sustainable construction and management in Yancheng Coastal wetland World Natural Heritage Site.