Effects of changes in land use and cover on carbon storage in the Three Gorges Reservoir Area

FAN Lihong, ZHU Jianhua, LI Qi, FENG Yuan, XIAO Wenfa

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (04) : 53-60.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (04) : 53-60. DOI: 10.3969/j.issn.1000-2006.201707018

Effects of changes in land use and cover on carbon storage in the Three Gorges Reservoir Area

  • FAN Lihong1, ZHU Jianhua1,2*, LI Qi1, FENG Yuan1, XIAO Wenfa1,2
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Abstract

Abstract: 【Objective】Changes in carbon storage for different land use types in the Three Gorges Reservoir Area(TGRA)during 1990—2015 were estimated to understand the response of ecosystem carbon storage to land use changes in the TGRA, and provide reference for the study of the regional carbon cycle.【Method】Land use/cover change data in the TGRA were obtained from Landsat images from 1990, 2000 and 2015, and effects of land use/cover change on carbon storage in the TGRA were quantitatively analyzed using the InVEST model.【Result】 From 1990 to 2015, land use pattern and area clearly changed in the TGRA. Woodland, water bodies, construction land, and unused land increased in area, while farmland and grassland decreased in area. The total amount of carbon storage showed an increasing trend in the TGRA from 1990 to 2015, with a net increase of 90.43 Tg C, an increase rate of 24.47%, and an annual increase rate of 0.98%. Carbon storage was heterogeneous in space, being high in the east and the south, and low in the west and the north. Conversion of farmland to woodland was the main factor affecting the increase in carbon storage in the TGRA, whereas the loss of carbon storage was mainly caused by conversion of woodland to farmland and other land use types to water bodies and construction land. 【Conclusion】Land use changes in the TGRA have led to corresponding changes in the spatial and temporal distribution pattern of ecosystem carbon stocks, carbon stocks have increased with increase in woodland area. Therefore, under the precondition of ensuring the safety of farmlands, TGRA should intensify the implementation of returning farmlands to forests, and strengthen the protection of woodlands to increase the regional carbon sink potential and improve the regional ecological environment.

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FAN Lihong, ZHU Jianhua, LI Qi, FENG Yuan, XIAO Wenfa. Effects of changes in land use and cover on carbon storage in the Three Gorges Reservoir Area[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2018, 42(04): 53-60 https://doi.org/10.3969/j.issn.1000-2006.201707018

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