| Ecological security pattern is a spatial elements configuration optimization scheme,which is based on the analysis of the current situation of regional ecological environment,planning design and layout by a combination of natural elements and man-made elements of the region,in order solve the ecological environment problems and protect of ecological environment.Ecological security pattern is an important means and way to realize the regional ecological security,which provides new method for the management and protection of ecological environment.This paper takes Wuyi County as the study area based on the theory of landscape ecological security pattern,ecological security assessment and ecological system.On the basis of analyzing the structure of patch types and landscape by chosen relative landscape indexes,the research has set up the safe landscape pattern of Wuyi County and have done the planning of the ecological security area in reason of ecology through to apply theories of safe pattern of landscape ecology and building the minimum cumulative resistance for maintaining the important conservation district and protecting species diversity,The main findings are as follows:(1)In Wuyi County,there are seven kinds of landscape types,there are significant advantages of type,landscape distribution is not balanced,with the absolute advantage of woodland.In addition to forest land,garden,farmland,grassland,waters and unused land of the degree of fragmentation are high,patch shape are relatively rules.In general,the overall diversity index of Wuyi County is low,the heterogeneity is high,the connectivity is not strong,the structure is relatively broken,and the plaque shape is general.(2)Based on the MCR model to construct the resistance surface,the regional ecological suitability was classified according to the ecological red line area delineated in the Wuyi County Environmental Functional Zoning,and the buffer zone was identified.Then,Road and ecological strategic point,to build Wuyi comprehensive ecological security pattern to strengthen the regional spatial relations of the ecosystem.By constructing the minimum resistance and area relation curve,the minimum cumulative resistance threshold is determined,so as to divide the landscape security pattern of three layers of low,middle and high levels,and the ecological land and suitable area of the three ecological security levels were divided into 47.89%:75.40%24.60%.(3)Based on the comprehensive ecological and ecological pattern of Wuyi County,a reasonable ecological land use plan was established,and the ecological land and suitable area of the three ecological security levels were divided into 23.08%:47.89%:75.40%24.60%.(4)In Wuyi County,the designated ecological red line are mostly located in the southwest and east of the county,so based on ecological red line to build the Wuyi County ecological security pattern,ecological corridors and ecological strategic points are mostly concentrated in these areas The From the structure of Wuyi County landscape security pattern,the county ecological barrier is mainly concentrated in the lower and eastern regions.This makes it necessary to construct a regional ecological security pattern from the perspective of the whole,with the surrounding Songyang County,Lishui City,Jinyun County,Yongkang City and Jinhua City.Especially in the southwest region,we can learn from and combine the existing ecological planning of Wuyi County and the relevant contents of Lishui City and Jinyun County Urban Development Plan to realize the "joint defense control" of regional ecological protection. |
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