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<p>Chongming Dongtan in Shanghai is one of the few remaining developing estuarine wetlands globally and serves as a crucial habitat along the Asia–Pacific migratory bird route. However, rapid economic and social development, coupled with direct and indirect human activities, has severely degraded the ecological environment of Chongming Dongtan. This study utilizes remote sensing images from 1996, 2002, 2008, 2014, and 2020 to construct a land use database for Chongming Dongtan. By integrating geographic information and data processing technologies, we analyze the land use changes in this region over time. Furthermore, we employ the InVEST model to investigate the changes in habitat quality over the past two decades. The results reveal that: (1) From 1996 to 2020, significant changes occurred in the land use types of Chongming Dongtan. Over 25 years, the areas of reed marshes, paddy fields, forest land, and construction land showed an overall increasing trend, while the area of Spartina alterniflora marshes decreased. Overall, in both 1996 and 2020, water bodies and Spartina alterniflora marshes were the largest and smallest land use types, respectively. (2) Analysis using the InVEST model indicates that the proportion of areas with poor habitat quality increased from 33.72% in 1996 to 41.62% in 2020, while the proportion of areas with excellent habitat quality decreased from 47.58% to 24.41% over the same period, demonstrating a general decline in habitat quality. (3) The drastic changes in land use and the increasing degree of landscape fragmentation in Chongming Dongtan have collectively led to changes in habitat quality. The study finds that regions experiencing significant ecological changes are closely linked to the expansion of construction land and Spartina alterniflora marshes. The increase in construction land has gradually deteriorated the internal habitat quality, while the external habitat quality has significantly changed with the growth and management of Spartina alterniflora marshes. This study can provide a reference for future decision-making in small-scale wetland ecological management.</p>

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Study on Habitat Quality of Chongming Dongtan Based on InVEST Model in Shanghai, China

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Jianshen Qu,
  • Bin Dong,
  • Xiao Liu,
  • Zhili Xu

摘要

Chongming Dongtan in Shanghai is one of the few remaining developing estuarine wetlands globally and serves as a crucial habitat along the Asia–Pacific migratory bird route. However, rapid economic and social development, coupled with direct and indirect human activities, has severely degraded the ecological environment of Chongming Dongtan. This study utilizes remote sensing images from 1996, 2002, 2008, 2014, and 2020 to construct a land use database for Chongming Dongtan. By integrating geographic information and data processing technologies, we analyze the land use changes in this region over time. Furthermore, we employ the InVEST model to investigate the changes in habitat quality over the past two decades. The results reveal that: (1) From 1996 to 2020, significant changes occurred in the land use types of Chongming Dongtan. Over 25 years, the areas of reed marshes, paddy fields, forest land, and construction land showed an overall increasing trend, while the area of Spartina alterniflora marshes decreased. Overall, in both 1996 and 2020, water bodies and Spartina alterniflora marshes were the largest and smallest land use types, respectively. (2) Analysis using the InVEST model indicates that the proportion of areas with poor habitat quality increased from 33.72% in 1996 to 41.62% in 2020, while the proportion of areas with excellent habitat quality decreased from 47.58% to 24.41% over the same period, demonstrating a general decline in habitat quality. (3) The drastic changes in land use and the increasing degree of landscape fragmentation in Chongming Dongtan have collectively led to changes in habitat quality. The study finds that regions experiencing significant ecological changes are closely linked to the expansion of construction land and Spartina alterniflora marshes. The increase in construction land has gradually deteriorated the internal habitat quality, while the external habitat quality has significantly changed with the growth and management of Spartina alterniflora marshes. This study can provide a reference for future decision-making in small-scale wetland ecological management.