太行山不同地形梯度生境质量空间分异及其影响因素研究——以河北省阜平县为例

生境质量是评价生物多样性的重要指标，研究不同地形梯度生境质量分布特征并对其影响因素进行探究，能为保护区域生物多样性及生态安全提供科学依据。基于2018年阜平县土地利用数据，应用InVEST模型、ArcGIS空间分析模块、地理探测器对阜平县生境质量水平进行测度，从空间分异和梯度效应2个角度对生境质量分布规律进行分析，并对生境质量的空间分布进行驱动因子探测以及交互作用探测分析。结果表明：(1)阜平县生境质量空间分异显著。阜平县生境质量整体偏低，生境质量高值区主要分布在西部及西北部高中山地区，生境质量低值区主要分布在东南部低山丘陵地区。(2)阜平县生境质量等级分布梯度效应显著。地形梯度Ⅰ～Ⅲ级内，阜平县生境质量呈现出递减趋势；地形梯度Ⅲ～Ⅴ级内，生境质量呈现出递增趋势。(3)高程与坡度为阜平县生境质量空间分异的主导影响因素。高程与坡度对生境质量的影响明显大于人为因素，高程与其他因子的交互作用对生境质量空间分异的影响大于单个驱动因子的交互作用。研究结果可为提高阜平县生态环境质量以及实现生态—经济协调发展提供科学依据。

Study on the spatial differentiation of habitat quality of different terrain gradients in Taihang mountains and its influencing factors——Taking Fuping County in Hebei Province as an example

Habitat quality was an important index for biodiversity evaluation. Studying the distribution characteristics of habitat quality in different terrain gradients and exploring its influencing factors would provide a scientific basis for regional biodiversity and ecological security. Based on the land use data of Fuping County in 2018, the distribution law of habitat quality was analyzed from the perspectives of spatial differentiation and gradient effect, and the spatial distribution of habitat quality was explored from the driving factor detection and interaction detection by means of the InVEST model, ArcGIS spatial analysis module, and geographic detector. The results showed that:(1) Spatial differentiation of habitat quality was significant in Fuping County. The habitat quality was low on the whole. High habitat quality areas were mainly distributed in the medium-high and high mountains in the west and northwest, and the low habitat quality areas were mainly distributed in the low mountains and hilly areas in the southeast.(2) Gradient effect of the distribution of habitat quality levels was significant in Fuping County. The terrain gradient Ⅰ～Ⅲ showed a decreasing trend while the terrain gradient Ⅲ～Ⅴ presented an increasing trend.(3) Elevation and slop in Fuping County was the dominant factors affecting the spatial differentiation of the habitat quality. The influence of altitude and slop on the habitat quality was obviously greater than that of human factors. The interaction between elevation and other factors on the spatial differentiation of habitat quality was greater than that of a single driving factor. The research results would provide a scientific basis for the improvement of ecological and environmental quality and the realization of coordinated ecological-economic development in Fuping County.