Changes in Mangrove Carbon Stocks and Exposure to Sea Level Rise (SLR) under Future Climate Scenarios

Sustainability

Minerva Singh¹  Maria Fernanda Adame²  Luís Junior Comissario Mandlate³  Luitgard Schwendenmann⁴  Gang Wang⁵ 

[1] Centre for Environmental Policy, Imperial College London, London SW7 2BX, UK;Centre for Marine and Coastal Research, Australian Rivers Institute, Griffith University, Brisbane, QLD 4222, Australia;Forestry Engineering Course, Agriculture Division, Higher Polytechnic Institute of Gaza (ISPG), Chokwe 1204, Mozambique;School of Environment, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand;School of Management, Guangdong University of Technology, Guangzhou 510520, China;

关键词: mangrove;    aboveground carbon;    belowground carbon;    climate change;    sea level;    machine learning;   

DOI  :  10.3390/su14073873

来源: DOAJ

【 摘 要 】

Mangrove ecosystems are threatened by a variety of anthropogenic changes, including climate change. The main aim of this research is to quantify the spatial variation in the different mangrove carbon stocks, aboveground carbon (AGC), belowground carbon (BGC), and soil carbon (SOC), under future climate scenarios. Additionally, we sought to identify the magnitude of sea-level rise (SLR) exposure with the view of identifying the mangrove regions most likely to face elevated inundation. Different representative concentration pathways (RCPs) ranging from the most optimistic (RCP 2.6) to medium emissions (RCP 4.5) and the most pessimistic (RCP 8.5) were considered for 2070. We used the Marine Ecoregions of the World (MEOW), a biogeographical classification of coastal ecosystems, to quantify the variation in future carbon stocks at a regional scale and identify areas of potential carbon stock losses and gains. Here, we showed that the mangroves of Central and Western Indo-Pacific islands (Andamans, Papua New Guinea, and Vanuatu), the west African coast, and northeastern South America will be the worst hit and are projected to affect all three carbon stocks under all future scenarios. For instance, the Andaman ecoregion is projected to have an 11–25% decline in SOC accumulation, while the Western Indo-Pacific realm is projected to undergo the sharpest declines, ranging from 10% to 12% under all three scenarios. Examples of these areas are those in Amazonia and the eastern part of South Asia (such as in the Northern Bay of Bengal ecoregion). Based on these findings, conservation management of mangroves can be conducted.

【 授权许可】

Unknown