Wetland Landscape Pattern Of The Fragility Of The Multi-scale Evaluation Method-

Wetland ecosystem and forest ecosystem and Marine ecosystem and listed as the three big ecosystems,is the highest capacity of production,in the earth's most abundant biodiversity in the system,one of the wetland ecosystem is very fragile,however,wetland vulnerability analysis to get people's attention.Liaohe delta wetland is one of important estuarine wetland in our country,a very rich and natural conditions,the wetland area is big,the structure type of typical and complex diversity of wetlands,with extremely high development prospects and development potential.Due to rapid economic development,human development and utilization of the mounting on wetlands,make the area in the wetland resources and the contradiction between the economic development is more prominent,are facing a serious threat to the ecosystem..In this paper,based on three years of landscape types on the landscape area of comparative analysis,three years of natural wetlands to the artificial wetland and the change is obvious.The class area of natural wetlands are showed decreasing trend.The artificial wetland,the wetland area is increasing year by year.In clear landscape vulnerable degree of landscape as the research object,selecting reasonable landscape pattern index build vulnerability index,the spatial and differential laws of landscape pattern in Liaohe delta vulnerability research,the time scales using kriging interpolation five class rank vulnerable area,the results show that high vulnerable areas scattered distribution in 2000,mainly in the most of Panjin and parts of Jinzhou.In 2009,medium vulnerable area expanded,Panshan vulnerability is still higher than other counties.013 low vulnerability area basic covers the whole Liaohe delta area,only parts of Panshan county and city near,there is a higher vulnerability.Spatial scales were vulnerable degree of comparative analysis,at the county level from 2000 to 2013 the regional vulnerable degree is on the decline,good development momentum.At the same time in Panjin,for example the space-time scale of the landscape pattern analysis,analyzes the two counties in Panjin and Panjin area landscape pattern dynamic changes in the last three years.Finally apply global autocorrelation and partial autocorrelation spatial correlation analysis.The Study found that there are significant agglomeration phenomenon,"high-value" and "low-low value distribution and the results of kriging interpolation analysis basically.Although from the recent development of Liaohe delta area vulnerable degree is reduced,but there still exists in some parts of high vulnerability value,should pay attention to the adjustment of the landscape pattern and ecological planning in the study area,continue to adhere to develop economic construction and ecological environment of this area has a set the overall planning.