云南省自然环境生态适宜性空间格局研究

Study on Spatial Pattern of Ecological Suitability of Natural Environment in Yunnan Province

合理评价区域自然环境生态适宜性对促进区域可持续发展具有重要意义。本文以云南省为案例地,建立自然环境生态适宜性指标体系,运用熵权法和综合指数法对云南省县域自然环境生态适宜性进行评价,以GIS技术和空间自相关法分析自然环境生态适宜性空间格局特征。结果表明:①云南省自然环境生态适宜性指数0.26-0.84之间,5个等级的自然环境生态适宜性区的面积分别为91,768km^(2)、87,697km^(2)、66,188km^(2)、10,6662km^(2)和39,832km^(2),分别占云南省国土面积的23.40%、22.36%、16.88%、27.20%和10.16%。②自然环境生态适宜性指数值呈带状分布,由南部向北部腹地递减。③云南省自然环境生态适宜性指数表现出显著的空间正相关性,在空间上从南到北呈现出“高-高”“不明显”“低-低”的聚集格局,两极分化明显。云南省自然环境整体生态适宜性较好,区域分异特征显著,自然环境生态适宜性存在显著的聚集特征。

A reasonable assessment of the ecological suitability of regional natural environment is of great significance to promote regional sustainability.Taking Yunnan Province as a case site,this paper established a natural environment ecological suitability index system,and used entropy method and comprehensive index method to evaluate natural environment ecological suitability of the county in Yunnan Province,then analyzed natural environment ecology by GIS technology and spatial autocorrelation method Suitability spatial pattern characteristics.The results showed that:①The value of ecological suitability index of the natural environment in Yunnan Province was between 0.26 and 0.84.The areas of the five levels of natural environmental and ecological suitable areas were 91,768km^(2),87,697km^(2),66,188km^(2),10,6662km^(2),and 39,832km^(2),respectively,which accounted for 23.40%,22.36%,16.88%,27.20% and 10.16% of the land area of Yunnan Province.②The value of the ecological suitability index of the natural environment was distributed in a band,decreasing from the south to the hinterland of the north.③The ecological suitability index of the natural environment in Yunnan Province shows a significant positive spatial correlation,showing a pattern of"high-high","not obvious",and"low-low"spatially from south to north with obvious two-level differentiation.The overall ecological suitability of the natural environment in Yunnan Province was relatively good.regional differentiation characteristics were significant,and the ecological suitability of the natural environment had obvious aggregation characteristics.