基于InVEST模型的北京山区2015和2020年生境质量分析

Habitat Quality Analysis Based on the InVEST Model for 2015 and 2020 in Mountainous Areas of Beijing

人类的生命活动依赖于生态系统所提供的各项服务,生物多样性的重要性已经得到了全球范围内的广泛共识。良好的生境条件可以为物种提供适宜的栖息、繁殖空间,丰富生物多样性程度。以北京山区为研究对象,利用InVEST模型的生境质量板块分析生境质量。首先,对北京山区整体生境进行分析,结果显示,北京山区整体以林地为主,生境质量评为优良的面积在85%以上,生境质量良好。其次,分等级对比2015和2020年北京山区生境质量的变化,同时结合土地利用转移矩阵,进一步分析地类变化和生境质量变化的联系。结果表明5年间北京山区部分耕地和草地被开发建设,生境质量有所下降,但整体平稳。因此提出重视山区草地及灌丛生境的保护、提升现有绿地生态效益、构建建设用地和绿地的制约平衡关系的提升策略。

Human life activities depend on the services provided by ecosystems,and the importance of biodiversity has been widely recognized globally.Good habitat conditions can provide suitable habitat and breeding space for species and enrich biodiversity.Habitat quality in the mountainous regions in Beijing was analyzed using the habitat quality panel of the InVEST model in this paper.Firstly,the analysis of the overall rating of habitat quality in Beijing's mountainous areas showed that the whole area of Beijing's mountainous areas was dominated by woodlands,and the area of habitat quality rated as excellent was larger than 85%with good habitat quality.Secondly,the changes in habitat quality in Beijing mountainous areas in 2015 and 2020 were compared by grade combined with the land use transfer matrix,it showed that some arable land and grassland in Beijing mountainous areas were developed and constructed during the five years,and the habitat quality decreased but was stable overall.The habitat degradation index showed that habitat degradation in Beijing's mountainous areas deepened in 2015 and 2020.Therefore,it puts forward the promotion strategy of attaching importance to the protection of grassland and shrub habitat in mountain areas,improving the ecological benefit of existing green space,and establishing the restriction and balance relationship between construction land and green space.