基于InVEST模型的赤水河流域生境质量时空分异特征及驱动因素分析

Spatial-temporal Differentiation and Driving Factors of Habitat Quality in the Chishui River Basin Based on InVEST Model

生境质量是反映生物多样性的重要指标,在高质量发展背景下研究生境质量演变及驱动因素对于区域可持续发展及生态安全维护具有重要意义。基于赤水河流域2000-2018年五期土地利用数据,通过InVEST模型对生境质量进行评估,使用冷热点分析探究了其空间分异特征,并借助地理探测器探究了生境质量空间分布的影响因素。结果表明:从时间上看,赤水河流域生境质量呈先上升后降低趋势;冷热点分析显示,生境质量与生境退化在空间上表现为“上游弱下游强”的分异特征;地理探测结果显示土地利用是影响赤水河流域生境质量的主导因素,赤水河流域受自然因素与社会经济因素的协同作用。研究结果明确识别了的生境质量保护重点区以及不同因素对生境质量的影响程度,有助于为流域生物多样性保护战略及高质量发展管理决策提供理论依据。

Habitat quality is an important indicator reflecting biodiversity. Under the background of high-quality development, studying the evolution and driving factors of environmental quality is of great significance for regional sustainable development and ecological security maintenance. Based on the five-phase land use data in the Chishui River Basin from 2000 to 2018, the InVEST model assess habitat quality isused, and its spatial differentiation characteristics isexplored byusing hot and cold spot analysis.In addition, the influencing factors of the spatial distribution of habitat quality are explored by means of geographic detectors. The results show thatin terms of time, the habitat quality of the Chishui River Basin shows a trend of increasing first and then decreasing. The analysis of hot and cold spots shows that habitat quality and habitat degradation are spatially characterized by “weak upstream and strong downstream”. Geographical detection results show that land use is the dominant factor affecting the habitat quality of the Chishui River Basin, and the Chishui River Basin is affected by the synergistic effect of natural and socioeconomic factors. The results clearly identify the key areas of habitat quality protection and the degree of influence of different factors on habitat quality, which is helpful to provide a theoretical basis for watershed biodiversity conservation strategy and high-quality development management decision-making.