dc.contributor.author | Paine, Ellie R | |
dc.contributor.author | Schmid, Matthias | |
dc.contributor.author | Boyd, Philip W | |
dc.contributor.author | Diaz-Pulido, Guillermo | |
dc.contributor.author | Hurd, Catriona L | |
dc.date.accessioned | 2021-08-12T01:04:27Z | |
dc.date.available | 2021-08-12T01:04:27Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 0022-3646 | |
dc.identifier.doi | 10.1111/jpy.13198 | |
dc.identifier.uri | http://hdl.handle.net/10072/406817 | |
dc.description.abstract | Dissolved 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.peerreviewed | Yes | |
dc.language | eng | |
dc.publisher | Wiley | |
dc.relation.ispartofjournal | Journal of Phycology | |
dc.subject.fieldofresearch | Plant biology | |
dc.subject.fieldofresearch | Fisheries sciences | |
dc.subject.fieldofresearchcode | 3108 | |
dc.subject.fieldofresearchcode | 3005 | |
dc.subject.keywords | Carbon sequestration | |
dc.subject.keywords | dissolved organic carbon | |
dc.subject.keywords | exudation | |
dc.subject.keywords | ocean carbon biogeochemical cycle | |
dc.subject.keywords | primary production | |
dc.title | Rate and fate of dissolved organic carbon release by seaweeds: a missing link in the coastal ocean carbon cycle | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dcterms.bibliographicCitation | Paine, 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.updated | 2021-08-10T03:04:43Z | |
dc.description.version | Accepted Manuscript (AM) | |
gro.description.notepublic | This 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.hasfulltext | Full Text | |
gro.griffith.author | Diaz-Pulido, Guillermo | |