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Geoscience ›› 2024, Vol. 38 ›› Issue (03): 574-588.DOI: 10.19657/j.geoscience.1000-8527.2024.050

• Observation Simulation and Prediction Evaluation of Superbiotic Resources • Previous Articles     Next Articles

Analysis and Predictions of the Spatiotemporal Variations of Ecosystem Carbon Storages in the Xin’an River Basin Based on PLUS and InVEST Models

MIN Jie1(), LIU Xiaohuang2,3(), XIAO Yuexin2,4,5, LI Hongyu2,3, LUO Xinping2,3, WANG Ran2,3, XING Liyuan2,3, WANG Chao3, ZHAO Honghui3   

  1. 1. College of Geography and Remote Sensing Science, Xinjiang University, Urumqi, Xinjiang 870000, China
    2. Key Laboratory of Natural Resource Coupling Process and Effects, Ministry of Natural Resources, Beijing 100055, China
    3. Natural Resources Comprehensive Survey Command Center, China Geological Survey, Beijing 100055, China
    4. Observation and Research Station of Land and Water Resources in Huangshan, Huangshan, Anhui 245000, China
    5. Changsha Comprehensive Survey Center of Natural Resources, China Geological Survey, Changsha, Hunan 410600, China
  • Online:2024-06-10 Published:2024-07-04

Abstract:

The study on the spatiotemporal evolution of carbon storage in the Xin’an River Basin has demonstrated positive feedback on the ecological environmental protection and land-use optimization.We utilize the land-use data from 2000 to 2020 and the InVEST model to scrutinize the historical changes of land-use and alterations of carbon storage in Xin’an River Basin.Meanwhile, the PLUS model was utilized to forecast the distribution of carbon storage in the same basin in 2040 under multiple development scenarios.The results indicate that (1) the change of land-use has a direct impact on the carbon storage in the study area.From 2000 to 2020, the construction land in Xin’an River Basin expanded by 602.707 km2, while the forest land, cultivated land, grassland, and shrub land decreased by 615.225 km2, 42.640 km2, 3.021 km2, and 0.296 km2, respectively.This resulted in a reduction in carbon storage of 4.937×106 t.Carbon storage is intrinsically related to the spatial distribution of land-use, with an area of higher carbon storage having a less construction land but more clustered and distributed ecological land.(2) The multi-scenario simulation for the year of 2040 reveals that the local changes are pronounced, while the overall land-use pattern remains consistent.The carbon storage under urban development, natural development, and farmland protection scenarios decreased by 7.540×106 t, 7.544×106 t, and 11.302×106 t, respectively.The eco-protection scenario predicted the smallest decrease in carbon storage, up to 7.130×106 t.(3) The spatial differentiation of carbon storage was influenced by topography, ecology, and anthropogenic factors.Geodetector revealed that the explanatory power of NDVI (0.561) and NPP (0.398) was significantly higher than other factors, making them the primary drivers of the spatial differentiation of carbon storages in Xin’an River Basin.The interactions between different influencing factors were stronger than a single factor, with the synergistic influence between NDVI and slope (0.652) being the most potent one.We conclude that the implementation of urban development and ecological protection strategy can mitigate the reduction of carbon storage.Future plans should prioritize the protection of ecological land and controlling the expansion of construction land in order to enhance the carbon storage.

Key words: Xin’an River Basin, land use, PLUS, InVEST, carbon storage, geodetector

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