Abstract:

The carbon storage of terrestrial ecosystem is closely related to global climate change. Studying the impact of land use change on the carbon storage of ecosystem services in the coastal zone is of great significance for regional ecosystem protection and economic and social development. Taking the coastal zone of Liaoning Province as an example, this paper analyzed the characteristics of land use change in coastal zone from 1995 to 2018, and used the carbon storage module of InVEST model to estimate the changes of regional carbon storage from 1995 to 2018. The results showed that: (1) the carbon storage of ecosystem in the study area showed a decreasing trend, with a cumulative decrease of 12.97×10⁶ t; (2) the areas with high carbon storage are mainly distributed in the east and west sides and swamps in the middle of the study area, and the areas with low carbon storage are mainly distributed in the east of Jinzhou city and the north of Panjin city; (3) forest and cropland are the most important land use types for carbon sequestration in the study area, and its’s carbon storage accounts for 83.86% of the total carbon storage of all land use types. The increase of built-up land area and the decrease of forest and grassland area are the main reasons for the decrease of regional ecosystem carbon storage.

Key words: carbon storage, InVEST model, spatiotemporal variation, coastal zone