The impact of land-use changes on the spatio-temporal variation of carbon storage in the central mountainous area of Hainan Island

ZHANG Yucheng, HAN Nianlong, HU Ke, YU Miao, LI Xingqiang

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (2) : 115-122.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (2) : 115-122. DOI: 10.12302/j.issn.1000-2006.202105030

The impact of land-use changes on the spatio-temporal variation of carbon storage in the central mountainous area of Hainan Island

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Abstract

【Objective】 Understanding the spatio-temporal variation of land use change and ecosystem carbon storage in the central mountainous area of Hainan Island, China can provide a basis for a regional sustainable development and territorial spatial planning.【Method】 The InVEST model was used to estimate the variation of the carbon storage capacity (from 2000 to 2018) of a mountainous region in Hainan Island. These estimations were then used as an input in the PLUS model to simulate the impact of land use changes on the carbon storage of the region in 2050. 【Result】 The carbon storage of the central mountainous area in 2000, 2010 and 2018 was 80.44×106, 79.96×106 and 79.82×106 t, respectively. Throughout this time, the storage decreased, culminating in a cumulative decrease of 620 406.31 t. The reasons for the decrease were: from 2000 to 2010, the shrinking of the grassland biome in the region was the main contributing factor; from 2010 to 2018, the encroachment of urbanization on forest and cultivated land was the main driver of the decrease. As the major biome in the region, forest contributed most of the carbon storage. Grassland was much higher than other land types in terms of carbon storage density, and the regional carbon storage was sensitive to changes in its structure. Under the natural development scenario, the result of simulation indicated that the carbon storage in the study area would drop significantly in 2050, owing to the area increase in construction land and waters and the area decrease in forest land, grassland, and cultivated land. 【Conclusion】 There is a risk of declining carbon storage in ecosystems as urbanization increasing. Therefore, to ensure the stability of ecosystem functions and sustainable development, it is necessary to apply protective measures to the habitats of the study area.

Key words

carbon storage / central mountainous area of Hainan Island / land use change / InVEST model / PLUS model

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ZHANG Yucheng , HAN Nianlong , HU Ke , et al . The impact of land-use changes on the spatio-temporal variation of carbon storage in the central mountainous area of Hainan Island[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2023, 47(2): 115-122 https://doi.org/10.12302/j.issn.1000-2006.202105030

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