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Explicit and implicit assumptions within the blue carbon conceptual model: a critique


Gallagher, JB, Explicit and implicit assumptions within the blue carbon conceptual model: a critique, Proceedings of the International Conference on Marine Science and Aquaculture 2014: Ecosystem Perspectives in Sustainable Development, 18-20 March 2014, Kota Kinabalu, Sabah Malaysia, pp. 26-40. ISBN 9789834015640 (2014) [Plenary Presentation]

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Coastal vegetative sub-aquatic ecosystems provide a number of services at both regional and global scales. One such service is atmospheric CO2 sequestration and storage, referred to as "blue" carbon. The carbon is fixed, trapped and stored within the ecosystems plant biomass and sediments from both autochthonous and allochthonous sources. Current estimates indicate that coastal ecosystems contribute around half of the oceans annual long term carbon storage. However, such calculations contain a number of implicit and explicit assumptions that when challenged can significantly affect the result, namely: (1) assumptions under the umbrella of climatic response at the ecosystem level; (2) assumptions about sedimentary mineralisation; and (3) assumptions about the nature and stability of organic carbon supplied to and formed within the sediments (i.e. black carbon from biomass burning and brown carbon from sedimentary diagenesis).This article briefly reviews the current knowledge and questions these assumptions in light of more recent theories outside current blue carbon literature and measurements of black carbon content across a seagrass meadow.

Item Details

Item Type:Plenary Presentation
Keywords:carbon sequestration, blue carbon, black carbon, seagrass, macroalgae
Research Division:Environmental Sciences
Research Group:Climate change impacts and adaptation
Research Field:Carbon sequestration science
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Climate change adaptation measures (excl. ecosystem)
UTAS Author:Gallagher, JB (Dr John Barry Gallagher)
ID Code:136928
Year Published:2014
Deposited By:Oceans and Cryosphere
Deposited On:2020-01-22
Last Modified:2020-01-23

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