基于InVEST模型的四川省2000—2020年生境质量时空动态变化研究

Research on Dynamic Changes in Space-Time of Habitat Quality in Sichuan Province from 2000 to 2020 Based on InVEST Model

【目的】研究土地利用类型变化及生境质量变化的过程,为维护自然系统平衡、区域社会经济可持续发展提供支撑。【方法】基于InVEST模型的生境质量模块的强大功能,以我国西南地区四川省为研究区,在其土地利用变化的基础上,研究2000—2020年土地利用类型的动态改变与生境质量变化的联系。【结果】(1)四川省的建设用地面积不断扩张,而耕地和草地呈现出缩减的趋势;土地利用类型主要在耕地、草地与建设用地之间相互发生转换,耕地是建设用地转入的最大的来源。(2)四川省生境质量空间集聚性表现为增强,热点不断增加,冷点减少。【结论】四川省生境质量总体变化较稳定,但仍要注重对自然生态系统的保护,努力恢复和提升生境质量。

[Purposes] To study the process of land use type change and habitat quality change,and to provide support for maintaining the balance of natural system and sustainable development of regional social economy.[Methods] Based on the powerful functions of habitat quality module of InVEST model,southwest Sichuan Province was used as the study area.Based on the land use change,the relationship between dynamic changes of land use types and habitat quality changes during 2000—2020 was studied.[Findings](1)The area of construction land in Sichuan Province continued to expand,while the cultivated land and grassland showed a trend of reduction;Land use types are mainly converted among cultivated land,grassland and construction land,and cultivated land is the biggest source of construction land conversion.(2)The spatial agglomeration of habitat quality in Sichuan Province was enhanced,with increasing hot spots and decreasing cold spots.[Conclusions] The overall change of habitat quality in Sichuan Province is stable,but it is still necessary to pay attention to the protection of natural ecosystem and make efforts to restore and improve the habitat quality.