Carbon stocks and fluxes in Asia-Pacific mangroves: current knowledge and gaps

Sharma, Sahadev and Ray, Raghab and Martius, Christopher and Murdiyarso, Daniel (2023) Carbon stocks and fluxes in Asia-Pacific mangroves: current knowledge and gaps. ENVIRONMENTAL RESEARCH LETTERS, 18 (4). ISSN 1748-9326, DOI

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Mangrove forest plays a key role in regulating climate change, earth carbon cycling and other biogeochemical processes within blue carbon ecosystems. Therefore, mangrove forests should be incorporated into Earth system climate models with the aim of understanding future climate change. Despite multiple carbon stock and flux assessments taking place over the past couple of decades, concrete knowledge of carbon source/sink patterns is largely lacking, particularly in the biodiversity-rich Asia-Pacific (AP) region with its 68 493 km(2) of mangrove area. Thus, to understand the gaps in mangrove blue carbon research in the AP region, we summarize a recent decade-long inventory of carbon stock pools (aboveground, belowground and soil) and biogeochemical flux components (burial, export/import, soil-air and water-air CO2 flux) across 25 AP countries to understand the current knowledge and gaps. While carbon stock assessments of individual components are available for all 25 countries, whole ecosystem carbon stocks-including live and standing dead aboveground and belowground, downed woody debris and soil carbon stocks-are often lacking, even in highly researched countries like Indonesia. There is restricted knowledge around biogeochemical carbon fluxes in 55% of the countries, suggesting poor carbon flux research across the region. Focusing on flux components, reports on sediment-to-sea carbon exports are extremely limited (coming from just nine countries in the AP region). There is notable scarcity of data on carbon export fluxes in Indonesian mangroves. Given the key role AP mangroves play in climate change mitigation worldwide, more detailed and methodologically comparable investigation of biogeochemical source/sink processes is required to better understand the role of this large carbon source in global carbon stocks and fluxes, and hence, global climate.

Item Type: Article
Funders: CGIAR Research Program on Forests, Trees and Agroforestry (CRP-FTA) under CIFOR's Climate Change, Energy and Low Carbon Development portfolio, CGIAR Fund under CIFOR's Climate Change, Energy and Low Carbon Development portfolio
Uncontrolled Keywords: Blue carbon; Stock; Flux; Biogeochemistry; Asia-Pacific mangroves; Global climate change
Subjects: Q Science > QB Astronomy
T Technology > TD Environmental technology. Sanitary engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences
Depositing User: Ms Zaharah Ramly
Date Deposited: 22 Nov 2023 04:14
Last Modified: 22 Nov 2023 04:14

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