基于景观结构的林地生态风险空间统计分析

以湖北省英山县为例,依据土地权属调查资料建立村域尺度的林地生态风险模型,探讨乡村林地生态风险空间分布模式.研究表明:(1)林地生态风险与地形因子有较大相关性,村域坡度越小,风险水平越高;(2)林地生态风险水平总体呈现出较强的空间集聚趋势,风险水平较高(或较低)的村域趋于和同类的村域相邻;(3)每个村域的风险关联模式及空间分布不尽相同,"低—低"型村域在县域北部高海拔地域上呈现出连片分布态势,"高—高"型村域在县域中南部地域上形成连片分布格局,"低—高"与"高—低"型村域则以分散分布为主.研究结果为有效采取风险规避措施提供了理论依据.

Spatial Statistical Analysis of Woodland Ecological Risks Based on Landscape Structures

Based on investigation data of rural land ownership,a village-scale ecological risk model was established to discuss the spatial pattern of rural woodland ecological risk.Taking Yingshan County of Hubei Province as a case,the results indicate：（1） there is a great connection between woodland ecological risk and terrain factors.The smaller the slope of village is,the higher the risk level is.（2） The woodland ecological risk level of tend villages shows a strong overall trend of spatial concentration.The villages with the higher（or the lower） risk tend to be next to the villages with the higher（or lower） risk.（3） Villages have different risks in their spatial connection patterns.In part,the villages under the model of ＇low-low＇ association are in the northern region with a higher altitude,but the villages under the model of ＇high-high＇ association are in the central southern region.They present a contiguous geographical distribution.However,the villages under the model of ＇low-high＇ and ＇high-low＇ are dispersed.This research provided a basis for adopting effective measures to avoid woodland ecological risks.