Study On The Protection Of Ecological Land Based On The Landscape Security Pattern Of Yanji-Longjing-Tumen Region

With the acceleration of urbanization,the construction land is increasingly encroached on and destroyed the ecological land,which leads to a series of ecological and environmental problems.The ecological land has an important ecological value and function,which maintains the ecological environment security of the country or region.In recent years,with the contradiction between people and land being increasingly sharp,people are increasingly aware of the importance of ecological land.Not only have the country actively carried out the construction of ecological civilization but many scholars have also invested in the study of ecological land.Now the Yanbian Korean Autonomous Prefecture is in the stage of "13th Five-Year" planning period,and recently,it set up a construction planning of the Yanji-Longjing-Tumen New District,Their strategic positioning are that the Yanbian Korean Autonomous Prefecture will be built into a national ecological civilization advance demonstration zone,and that the Yanji-Longjing-Tumen New District will be made into a leading area of green transition development of the Yanbian Korean Autonomous Prefecture,and both of them adhere to the concept of ecological and green development.Based on the above background,this paper takes the Yanji-Longjing-Tumen region as an example to study the protection of the ecological land which hopes to contribute to the above planning,and the main research contents are as follows:(1)The ecological land of Yanji-Longjing-Tumen region is divided into forest land,water area,garden,green land,cultivated land and other ecological land,which drew lessons from the related research of ecological land,and also refer to the land use classification standard of current land resources management.Based on this,the landscape pattern index method was used to analyze the landscape pattern characteristics of the ecological land of Yanji-Longjing-Tumen region.The results showed that the ecological land existed some problems,such as unreasonable structure,uneven distribution,high degree of fragmentation and hidden trouble of safety,and put forward the corresponding suggestions.(2)Based on the theory of landscape security pattern,and combined with the actual situation in the study area,this paper first identified the ecological sources.Then this paper chose eight resistance factors to construct the resistance evaluation system which were from the natural geography,social economy and ecological limit three aspects,and constructed the minimum cumulative resistance surface by using the minimum cumulative resistance model.Then based on the minimum cumulative resistance surface,this paper identified the buffer zone,ecological corridors,radial channels,ecological nodes one by one by using the GIS spatial analysis method.At last,the above ingredients of the landscape security pattern were integrated into the landscape security pattern of the study area.(3)Finally,the landscape security pattern of the study area was combined with the land use type map in order to clarify the composition and distribution of land use under the landscape security pattern.It found that most of the land use is scientific and reasonable,which is beneficial to the ecological function developing of land use and ecological process,but there were also some problems.Then this paper discussed the protection of ecological land and put forward corresponding suggestions which was from the ecological sources,different resistance level buffer zone,ecological corridors,radial channels,ecological nodes five aspects.This paper used the landscape security pattern to study the protection of the ecological land,which not only provided a new case for the study of ecological land protection in China,but also provided he theoretical basis,data support and scientific basis for the ecological planning of land use of Yanji-Longjing-Tumen region.It is conducive to maintaining the ecological security of the study area,and it played a positive role in promoting the construction of the Yanbian Korean Autonomous Prefecture being a national ecological civilization advance demonstration zone and the Yanji-Longjing-Tumen region being a leading area of green transition development.