JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (5): 165-172.doi: 10.12302/j.issn.1000-2006.202204066

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Changing features of habitat quality in Wuxi City based on InVEST model

ZHAO Xiaoyu1(), WANG Yiming2, HE Xu1, LIU Xiaoyan1, ZHANG Jiamin1, DENG Yi3, FENG Yao3, CHU Lei1, ZHANG Zengxin1,2,*()   

  1. 1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry and Grassland, College of Soil and Water Conservation,Nanjing Forestry University, Nanjing 210037,China
    2. State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering,College of Hydrology and Water Resources,Hohai University, Nanjing 210098,China
    3. Wuxi Municipal Bureau of Natural Resources and Planning,Wuxi 214023, China
  • Received:2022-04-28 Revised:2022-11-17 Online:2024-09-30 Published:2024-10-03
  • Contact: ZHANG Zengxin E-mail:zxy1815469183@163.com;nfuzhang@163.com

Abstract:

【Objective】 Based on 30 m of high-resolution land use data of Wuxi City in 2000, 2010 and 2018, the Integrated Valuation of Ecosystem Services and Trade-offs (InVEST) model was used to reveal the changing features of habitat quality in Wuxi. Such information could provide a basis for ecological environment protection and restoration in Wuxi. 【Method】 Using the InVEST model, the habitat quality and habitat degradation degree of Wuxi during recent 20 years were simulated, and the relationship between the changes of land use, habitat quality and habitat degradation degree was analyzed by using the land use transfer matrix. 【Result】 In 2018, high-grade habitats in Wuxi accounted for approximately 31.11% of the city’s area, whereas the proportion of general grades was relatively higher, accounting for approximately 40.60% of the city’s area. The spatial distribution of habitat quality in Wuxi was various, with the high-grade habitats mainly distributed in Yixing City, Binhu District and other areas, while the low-grade habitats are predominantly located in the main urban area of Wuxi City and Jiangyin City. In the past 20 years, habitat quality in Wuxi has shown a significant degradation trend, of which the main urban areas of Wuxi such as Liangxi District and Jiangyin City have the most obvious degradation, whereas the degradation degree of Yixing City has not changed much. The changes of habitat quality and land use in Wuxi are inseparable, and among them, the construction land of Wuxi increased by approximately 12% from 717.40 km2 in 2000 to 1 291.40 km2 in 2018, and the area with increased construction land and the area where the quality of habitat decline is more obvious have good spatial consistency. 【Conclusion】 Degradation of habitat quality in Wuxi is closely related to the reduction of cultivated land area and the increase of urban construction land. Therefore, it is necessary to rationally use land, strictly control the scale of construction land, maintain the scale of ecological land use, and continuously improve the protection and restoration of wetlands.

Key words: land use, InVEST model, habitat quality, habitat degradation degree, land for construction, cultivated area, Wuxi City

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