Research On The Identification Of Land Ecological Nodes In Fuping County Based On MSPA Model

Land provides key natural resources for the survival and development of human beings.Only by effectively ensuring the safety of the land ecosystem can we maintain sustainable economic development and maintain social stability.Therefore,the protection of land ecological security is particularly important,as an important link to maintain land ecological security,the identification of ecological node’s spatial location and specific scale becomes a top priority.The Taihang Mountain Area is a key ecological barrier in the Beijing-Tianjin-Hebei region and an essential water conservation area.However,there are currently few studies on ecological node identification in this area.Therefore,this paper selects Fuping County in the Taihang Mountains,a typical ecologically fragile Area,as the research area to conduct land ecological node identification research.Because there is currently no agreement on the connotation and identification methods of land ecological nodes,this article uses the natural elements of land as the basis to determine the best analysis granularity of ecological nodes,systematically clarify the connotation of land ecological nodes,divide them into resource-based nodes and structural nodes,and explore the construction scale of structural ecological nodes,and the analysis its composition forms.Based on this,targeted protection and restoration measures are proposed,which will provide practical guidance for the construction of ecological nodes in the Taihang Mountains.The paper achieved the following results:(1)Based on the land type patch and land use type patch,the Fragstats software is used to analyze the landscape index and explore the sensitivity of each type of landscape index to the grain size.It is concluded that the difference in plaque type leads to the difference in the Optimum analysis granularity.The analysis suitable particle size range of land type and land use type patch,combined with the accuracy of the analysis and the actual situation of Fuping County,it is finally determined that the optimal analysis particle size in this paper is 30m.(2)Considering the functions and spatial location of ecological nodes,the land ecological nodes are divided into resource-based nodes and structural nodes.Resource-based nodes are ecological sources with high ecological functions,good connectivity,wide coverage,and fixed locations.With the help of Guidos software for MSPA(Morphological Spatial Pattern)analysis,Fuping County is divided into 7 land use types,The summary shows that the spatial distribution of each land type is scattered,and the core area accounts for the largest proportion;Conducting connectivity analysis for the core area,obtained 47 resource-based nodes,totaling 76071.25 hm2,accounting for 30.96%of the total area of the study area.(3)Structural nodes have a small range of influence and are mobile nodes,and their location changes dynamically with time and human influence,including ecological obstacle points,ecological pinch points,and ecological break points.Based on the resource-based node,the landscape type,soil organic matter content,vegetation coverage,elevation,slope,annual average temperature,and annual average precipitation are used as resistance factors to comprehensively determine the spatial location of the structural ecological nodes,and the specific scale and composition form are determined according to the spatial location.Specifically:Based on resource-based nodes,the MCR model is used to construct the minimum cumulative resistance surface;Using Linkage Mapper analysis to determine a total of 115 structural ecological nodes,a total of 38 ecological break points,33 ecological obstacle points,and 44 ecological pinch points.Using the granularity inversion method and the landscape index method,the optimal construction radius of structural nodes is determined to be 200 m.With the help of spatial network analysis,a total of 101 node formation areas with a total area of 992.11 hm2 and a total area of obstacles are 336.44 hm2.The pinch area is 411.21 hm2;the total breaking point is 378.19 hm2.In the process of node recognition,there is a partial overlap area,where the coincidence area between obstacle point and fault point is 37.59 hm2,that of the pinch point and break point is 89.93 hm2,and that of theoverlap area between the pinch point and the obstacle point is 6.21 hm2.(4)Through comprehensive analysis of the number of ecological nodes and their spatial distribution,suggestions for protection are put forward:Resource-based nodes are the cornerstone of the ecological network and have the characteristics of a fixed location and a large range of influence.Therefore,47 resource-based nodes should be included in the forbidden construction area to ensure their ecological quality.The ecological obstacles in the structural nodes seriously affect the migration,communication and reproduction of organisms.Most of the landscape types are bare land.Therefore,certain landscape types can be converted to grassland or woodland with high ecological value.The ecological pinch point is a necessary point for animal migration and communication,and its ecological land should be included in the priority protection object,and the occupation of construction land should be strictly prevented.Ecological breakpoints are mainly used for transportation.Because they threaten the safety of biological life in the process of biological migration and communication,their non-ecological uses can be converted into landscape types.If they cannot be converted,engineering measures such as building overpasses can be used to help animals migrate.