Substantial role of macroalgae in marine carbon sequestration

Handle URI:
http://hdl.handle.net/10754/622473
Title:
Substantial role of macroalgae in marine carbon sequestration
Authors:
Krause-Jensen, Dorte; Duarte, Carlos M. ( 0000-0002-1213-1361 )
Abstract:
Vegetated coastal habitats have been identified as important carbon sinks. In contrast to angiosperm-based habitats such as seagrass meadows, salt marshes and mangroves, marine macroalgae have largely been excluded from discussions of marine carbon sinks. Macroalgae are the dominant primary producers in the coastal zone, but they typically do not grow in habitats that are considered to accumulate large stocks of organic carbon. However, the presence of macroalgal carbon in the deep sea and sediments, where it is effectively sequestered from the atmosphere, has been reported. A synthesis of these data suggests that macroalgae could represent an important source of the carbon sequestered in marine sediments and the deep ocean. We propose two main modes for the transport of macroalgae to the deep ocean and sediments: macroalgal material drifting through submarine canyons, and the sinking of negatively buoyant macroalgal detritus. A rough estimate suggests that macroalgae could sequester about 173 TgC yr â '1 (with a range of 61-268 TgC yr â '1) globally. About 90% of this sequestration occurs through export to the deep sea, and the rest through burial in coastal sediments. This estimate exceeds that for carbon sequestered in angiosperm-based coastal habitats.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Krause-Jensen D, Duarte CM (2016) Substantial role of macroalgae in marine carbon sequestration. Nature Geoscience 9: 737–742. Available: http://dx.doi.org/10.1038/ngeo2790.
Publisher:
Springer Nature
Journal:
Nature Geoscience
Issue Date:
12-Sep-2016
DOI:
10.1038/ngeo2790
Type:
Article
ISSN:
1752-0894; 1752-0908
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorKrause-Jensen, Dorteen
dc.contributor.authorDuarte, Carlos M.en
dc.date.accessioned2017-01-02T09:28:33Z-
dc.date.available2017-01-02T09:28:33Z-
dc.date.issued2016-09-12en
dc.identifier.citationKrause-Jensen D, Duarte CM (2016) Substantial role of macroalgae in marine carbon sequestration. Nature Geoscience 9: 737–742. Available: http://dx.doi.org/10.1038/ngeo2790.en
dc.identifier.issn1752-0894en
dc.identifier.issn1752-0908en
dc.identifier.doi10.1038/ngeo2790en
dc.identifier.urihttp://hdl.handle.net/10754/622473-
dc.description.abstractVegetated coastal habitats have been identified as important carbon sinks. In contrast to angiosperm-based habitats such as seagrass meadows, salt marshes and mangroves, marine macroalgae have largely been excluded from discussions of marine carbon sinks. Macroalgae are the dominant primary producers in the coastal zone, but they typically do not grow in habitats that are considered to accumulate large stocks of organic carbon. However, the presence of macroalgal carbon in the deep sea and sediments, where it is effectively sequestered from the atmosphere, has been reported. A synthesis of these data suggests that macroalgae could represent an important source of the carbon sequestered in marine sediments and the deep ocean. We propose two main modes for the transport of macroalgae to the deep ocean and sediments: macroalgal material drifting through submarine canyons, and the sinking of negatively buoyant macroalgal detritus. A rough estimate suggests that macroalgae could sequester about 173 TgC yr â '1 (with a range of 61-268 TgC yr â '1) globally. About 90% of this sequestration occurs through export to the deep sea, and the rest through burial in coastal sediments. This estimate exceeds that for carbon sequestered in angiosperm-based coastal habitats.en
dc.publisherSpringer Natureen
dc.titleSubstantial role of macroalgae in marine carbon sequestrationen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalNature Geoscienceen
dc.contributor.institutionDepartment of Bioscience, Aarhus University, VejlsØvej 25, Silkeborg, DK-8600, Denmarken
dc.contributor.institutionArctic Research Centre, Department of Bioscience, Aarhus University, Ny Munkegade 114, Arhus C, 8000, Denmarken
kaust.authorDuarte, Carlos M.en
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