Abstract
Carbon storage of terrestrial ecosystems plays a vital role in advancing carbon neutrality. Better understanding of how land use changes affect carbon storage in urban agglomeration will provide valuable guidance for policymakers in developing effective regional conservation policies. Taking the Pearl River Delta Urban Agglomeration (PRDUA) in China as an example, we examined the heterogeneous response of carbon storage to land use changes in 1990–2018 from a combined view of administrative units and physical entities. The results indicate that the primary change in land use was due to the expansion of construction land (5897.16 km2). The carbon storage in PRDUA decreased from 767.34 Tg C in 1990 to 725.42 Tg C in 2018 with a spatial pattern of high wings and the low middle. The carbon storage loss was largely attributed to construction land expansion (55.74%), followed by forest degradation (54.81%). Changes in carbon storage showed significant divergences in different sized cities and hierarchical boundaries. The coefficients of geographically weighted regression (GWR) reveal that the alteration in carbon storage in Guangzhou City was more responsive to changes in construction land (−0.11) compared to other cities, while that in Shenzhen was mainly affected by the dynamics of forest land (8.32). The change in carbon storage was primarily influenced by the conversion of farmland within urban extent (5.05) and the degradation of forest land in rural areas (5.82). Carbon storage changes were less sensitive to the expansion of construction land in the urban center, urban built-up area, and ex-urban built-up area, with the corresponding GWR coefficients of 0.19, 0.04, and 0.02. This study necessitates the differentiated protection strategies of carbon storage in urban agglomerations.
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Foundation item: Under the auspices of National Natural Science Foundation of China (No. 42171414, 41771429), the Open Fund of Guangdong Enterprise Key Laboratory for Urban Sensing, Monitoring and Early Warning (No. 2020B121202019)
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Liu, W., Liu, D. & Liu, Y. Spatially Heterogeneous Response of Carbon Storage to Land Use Changes in Pearl River Delta Urban Agglomeration, China. Chin. Geogr. Sci. 33, 271–286 (2023). https://doi.org/10.1007/s11769-023-1343-3
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DOI: https://doi.org/10.1007/s11769-023-1343-3