Spatiotemporal Change and the Natural–Human Driving Processes of a Megacity’s Coastal Blue Carbon Storage

Wenbo Cai, Qing Zhu, Meitian Chen and Yongli Cai
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Wenbo Cai: School of Design & China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai 200240, China
Qing Zhu: School of Design & China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai 200240, China
Meitian Chen: School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
Yongli Cai: School of Design & China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai 200240, China

IJERPH, 2021, vol. 18, issue 16, 1-17

Abstract: Coastal blue carbon storage (CBCS) plays a key role in addressing global climate change and realizing regional carbon neutrality. Although blue carbon has been studied for some years, there is little understanding of the influence of a megacity’s complex natural and human-driven processes on CBCS. Taking the Shanghai coastal area as an example, this study investigated the spatiotemporal change in CBCS using the InVEST (Integrated Valuation of Ecosystem Services and Tradeoffs) model during 1990–2015, and analyzed the response of the CBCS to a megacity’s complex natural- and human-driven processes through a land use/land cover transition matrix and hierarchical clustering. The results were as follows: (1) Thirty-three driving processes were identified in the study area, including four natural processes (e.g., accretion, succession, erosion, etc.), two human processes (reclamation and restoration) and twenty-seven natural–human coupled processes; they were further combined into single and multiple processes with positive and negative influences on the CBCS into four types (Mono+, Mono?, Multiple+ and Multiple? driving processes). (2) Shanghai’s CBCS increased from 1659.44 × 10 4 Mg to 1789.78 ×10 4 Mg, though the amount of Shanghai’s coastal carbon sequestration showed a decreasing trend in three periods: 51.28 × 10 4 Mg in 1990–2000, 42.90 × 10 4 Mg in 2000–2009 and 36.15 × 10 4 Mg in 2009–2015, respectively. (3) There were three kinds of spatiotemporal patterns in the CBCS of this study area: high adjacent to the territorial land, low adjacent to the offshore waters in 1990; high in the central part, low in the peripheral areas in 2009 and 2015; and a mixed pattern in 2000. These patterns resulted from the different driving processes present in the different years. This study could serve as a blueprint for restoring and maintaining the CBCS of a megacity, to help mitigate the conflicts between socioeconomic development and the conservation of the CBCS, especially in the Shanghai coastal area.

Keywords: land use/land cover; spatiotemporal dynamics; driving forces; blue carbon; coastal zone; megacity; urban governance (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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