| Natural reserves mainly refer to areas that protect regional natural ecosystems,endangered wildlife and their natural habitats.They not only have a variety of ecological functions,such as soil and water conservation,water conservation,maintenance of ecological balance,and protection of species diversity,but also have very important significances such as protection of the natural background,aesthetic value,and opening up of study bases.Since the 20 th century,with the gradual improvement of the construction of natural reserves,natural reserves have played an important role in maintaining the internal stability of ecological environments and protecting natural resources.However,due to the increasingly prominent ecological problems,it is necessary to put forward more targeted countermeasures for ecological protection to realize the sustainable development of natural reserves.Through studying the relevant literature at home and abroad,this paper analyzes the digital and literal data based on the field investigation,processes the remote sensing data by 3S technology and calculates the weighted value of evaluation factors by comprehensive weighting method,thus completing the comprehensive evaluation of ecological sensitivity of natural reserves.According to the analysis results,the ecological function zoning was carried out and corresponding countermeasures for ecological protection were put forward to realize the ecological construction of natural reserves.The study results of this paper are as follows:(1)In the study method,the selected factors were weighted comprehensively by AHP-entropy method,and different factors were extracted and analyzed by Arc GIS software and single-factor ecological sensitivity grid map was drawn.Combined with weighting superposition method,comprehensive analysis on ecological sensitivity of natural reserves was completed,ecological function zoning was carried out according to the evaluation results and corresponding countermeasures for ecological protection were put forward.(2)The study object is Mountain Yao Natural Reserve.Through the analysis ofrelevant data and in combination with the field investigation,the current situation of the reserve was expounded systematically.The region was dominated by mountain and forest landscapes,with various vegetation types,mainly deciduous broad-leaved forest,coniferous and broad-leaved mixed forest and coniferous forest,with 124 families,521 genera and 1,211 species of spermatophytes alone.In addition,the region also has a rich variety of wild animals,including 21 orders,51 families,125 species of terrestrial vertebrates alone,and about 31 species of national or provincial key protected animals,such as leopard and golden eagle.(3)Based on the actual situation of the natural reserve,12 evaluation index factors including elevation,annual rainfall,vegetation type and grade of landscape resource were selected from the four aspects of landform,natural conditions,vegetation type and human activities to construct the corresponding sensitivity evaluation system.Finally,the sensitivity of the natural reserve was evaluated by comprehensive weighting method and weighting superposition method.(4)In terms of study results,the evaluation results were divided into five sensitivity grades by natural discontinuous point classification method,namely low sensitivity,comparatively low sensitivity,medium sensitivity,comparatively high sensitivity and high sensitivity.According to the actual situation,the evaluation results were adjusted,and the natural reserves were divided into three functional areas and corresponding countermeasures for ecological protection were put forward. |
PDF Full Text Request