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dc.contributor.authorPaine, Ellie R
dc.contributor.authorSchmid, Matthias
dc.contributor.authorBoyd, Philip W
dc.contributor.authorDiaz-Pulido, Guillermo
dc.contributor.authorHurd, Catriona L
dc.date.accessioned2021-08-12T01:04:27Z
dc.date.available2021-08-12T01:04:27Z
dc.date.issued2021
dc.identifier.issn0022-3646
dc.identifier.doi10.1111/jpy.13198
dc.identifier.urihttp://hdl.handle.net/10072/406817
dc.description.abstractDissolved organic carbon (DOC) release by seaweeds (marine macroalgae) is a critical component of the coastal oceans biogeochemical carbon cycle but is an aspect of seaweed carbon physiology that we know relatively little about. Seaweed-derived DOC is found throughout coastal ecosystems and supports multiple food web linkages. Here we discuss the mechanisms of DOC release by seaweeds and group them into passive (leakage, requires no energy) and active release (exudation, requires energy) with particular focus on the photosynthetic 'overflow' hypothesis. The release of DOC from seaweeds was first studied in the 1960's but subsequent studies use a range of units hindering evaluation: we convert published values to a common unit (μmol C · g DW-1 · h-1 ) allowing comparisons between seaweed phyla, functional groups, biogeographic region, and an assessment of the environmental regulation of DOC production. The range of DOC release rates by seaweeds from each phylum under ambient environmental conditions was: 0 - 266.44 μmol C · g DW-1 · h-1 (Chlorophyta), 0 - 89.92 μmol C · g DW-1 · h-1 (Ochrophyta) and 0 - 41.28 μmol C · g DW-1 · h-1 (Rhodophyta). DOC release rates increased under environmental factors such as desiccation, high irradiance, non-optimal temperatures, altered salinity and elevated dissolved carbon dioxide (CO2 ) concentrations. Importantly DOC release was highest by seaweeds which were desiccated (<90 times greater DOC release compared to ambient). We discuss the impact of future ocean scenarios (ocean acidification, seawater warming, altered irradiance) on DOC release rates by seaweeds, the role of seaweed-derived DOC in carbon sequestration models, and how they inform future research directions.
dc.description.peerreviewedYes
dc.languageeng
dc.publisherWiley
dc.relation.ispartofjournalJournal of Phycology
dc.subject.fieldofresearchPlant biology
dc.subject.fieldofresearchFisheries sciences
dc.subject.fieldofresearchcode3108
dc.subject.fieldofresearchcode3005
dc.subject.keywordsCarbon sequestration
dc.subject.keywordsdissolved organic carbon
dc.subject.keywordsexudation
dc.subject.keywordsocean carbon biogeochemical cycle
dc.subject.keywordsprimary production
dc.titleRate and fate of dissolved organic carbon release by seaweeds: a missing link in the coastal ocean carbon cycle
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationPaine, ER; Schmid, M; Boyd, PW; Diaz-Pulido, G; Hurd, CL, Rate and fate of dissolved organic carbon release by seaweeds: a missing link in the coastal ocean carbon cycle, Journal of Phycology, 2021
dc.date.updated2021-08-10T03:04:43Z
dc.description.versionAccepted Manuscript (AM)
gro.description.notepublicThis publication has been entered as an advanced online version in Griffith Research Online.
gro.rights.copyright© 2021 Phycological Society of America. This is the peer reviewed version of the following article: Rate and fate of dissolved organic carbon release by seaweeds: a missing link in the coastal ocean carbon cycle, Journal of Phycology, 2021, which has been published in final form at https://doi.org/10.1111/jpy.13198. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html)
gro.hasfulltextFull Text
gro.griffith.authorDiaz-Pulido, Guillermo


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