基于InVEST模型的河北省生境质量时空演变驱动分析

Analysis of Spatiotemporal Evolution and Driving Factors for Habitat Quality in Hebei Province Based on InVEST Model

利用InVEST模型与土地覆盖数据,分析了河北省1995-2020年的生境质量时空分布格局,并借助地理探测器分析了气候、人口、地形等因素对生境质量空间分异的驱动机制。结果表明:(1)1995-2020年,河北省生境质量的平均值由0.4488降至0.4419,下降幅度为1.54%,其中城市建成区生境质量下降明显,沿海区域生境质量有所上升;(2)空间分布呈西北高、东南低的特征,山区生境质量较高而平原较低;(3)人口密度的增加及平均气温和年降水量的变化驱动着生境质量逐年下降;(4)坡度是影响生境质量的主导因子,解释力达0.84,其次为平均高程(0.67)、人口密度(0.65)及平均气温(0.61),而年降水量(0.12)的影响最小;(5)任意两因子的交互作用均大于单一因子对生境质量的影响。

Using the InVEST model and land coverage data,the spatial and temporal distribution of the habitat quality from 1995 to 2020 in Hebei Province were analyzed.The impacts of climate,population,and topography on the spatial distribution were analyzed with geographical detector.The results show:(1)The average habitat quality in Hebei Province decreased by 1.54%from 0.4488 to 0.4419.Habitat quality in urban built-up area had decreased while that of the coastal zone had increased;(2)As for the spatial distribution,the habitat quality was high in the northwest and low in the southeast.It’s also higher in mountainous areas than that in plains;(3)The increasing population density and changing annual average temperature and annual precipitation had made the habitat quality decline year by year;(4)The slope was the dominant factor affecting the spatial distribution of habitat quality,where the explanatory power reached 0.84,followed by the average elevation(0.67),population(0.65)and average temperature(0.61),while the annual precipitation had the least effect(0.12);(5)The interaction of any two factors was greater than the effect of a single factor on habitat quality.