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Kelp carbon sink potential decreases with warming due to accelerating decomposition

2022Journal article Open access
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dc.contributor.authorFilbee-Dexter, Karen
dc.contributor.authorFeehan, Colette J.
dc.contributor.authorSmale, Dan A.
dc.contributor.authorKrumhansi, Kira A.
dc.contributor.authorAugustine, Skye
dc.contributor.authorDe Bettignies, Florian
dc.contributor.authorBurrows, Michael T.
dc.contributor.authorByrnes, Jarrett E.K.
dc.contributor.authorCampbell, Jillian
dc.contributor.authorDavoult, Dominique
dc.contributor.authorDunton, Kenneth H.
dc.contributor.authorFranco, Joao N.
dc.contributor.authorGarrido, Ignacio
dc.contributor.authorGrace, Sean P.
dc.contributor.authorHancke, Kasper
dc.contributor.authorJohnson, Ladd E.
dc.contributor.authorKonar, Brenda
dc.contributor.authorMoore, Pippa J.
dc.contributor.authorNorderhaug, Kjell Magnus
dc.contributor.authorO'Dell, Alasdair
dc.contributor.authorPedersen, Morten F.
dc.contributor.authorSalomon, Anne K.
dc.contributor.authorSousa-Pinto, Isabel
dc.contributor.authorTiegs, Scott
dc.contributor.authorYiu, Dara
dc.contributor.authorWernberg, Thomas
dc.date.accessioned2023-08-24T11:18:58Z
dc.date.available2023-08-24T11:18:58Z
dc.date.issued2022
dc.descriptionThe study was funded by the Norwegian Blue Forest Network (www.nbfn.no). KFD was supported by the Australian Research Council (DE1901006192; www.arc.gov.au) and the National Science and Engineering Research Council of Canada (516938-2018; www.nserc.gov.ca). KFD and TW were supported by the Australian Research Council (DP190100058, DP220100650; www.arc. gov.au). JC was supported by NSERC Undergraduate Student Research Awards (UXSO100; www.nserc.gov.ca). JEKB was supported by Woods Hole Sea Grant (seagrant. whoi.edu). KHD was supported by BOEM Award M12AS0001. DS was supported by a UKRI Future Leaders Fellowship (MR/S032827/1; www.ukri.org). KH by Norwegian Research Council (267536; www.forskningsradet.no). PJM was supported by a NERC Newton Fund grant (NE/S011692/1; www. nerc.ukri.org). LEJ and IG were supported by a Canadian NSERC Discovery Grant (RGPIN-2017-05581; www.nserc.gov.ca). FdB and DD were supported by the Brittany Regional Council and the French Government through the National Research Agency with the investment expenditure program IDEALG (ANR-10-BTBR-04; www.cnrs.fr). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.pt_PT
dc.description.abstractCycling of organic carbon in the ocean has the potential to mitigate or exacerbate global climate change, but major questions remain about the environmental controls on organic carbon flux in the coastal zone. Here, we used a field experiment distributed across 28° of latitude, and the entire range of 2 dominant kelp species in the northern hemisphere, to measure decomposition rates of kelp detritus on the seafloor in relation to local environmental factors. Detritus decomposition in both species were strongly related to ocean temperature and initial carbon content, with higher rates of biomass loss at lower latitudes with warmer temperatures. Our experiment showed slow overall decomposition and turnover of kelp detritus and modeling of coastal residence times at our study sites revealed that a significant portion of this production can remain intact long enough to reach deep marine sinks. The results suggest that decomposition of these kelp species could accelerate with ocean warming and that low-latitude kelp forests could experience the greatest increase in remineralization with a 9% to 42% reduced potential for transport to long-term ocean sinks under short-term (RCP4.5) and long-term (RCP8.5) warming scenarios. However, slow decomposition at high latitudes, where kelp abundance is predicted to expand, indicates potential for increasing kelp-carbon sinks in cooler (northern) regions. Our findings reveal an important latitudinal gradient in coastal ecosystem function that provides an improved capacity to predict the implications of ocean warming on carbon cycling. Broad-scale patterns in organic carbon decomposition revealed here can be used to identify hotspots of carbon sequestration potential and resolve relationships between carbon cycling processes and ocean climate at a global scale.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFilbee-Dexter K, Feehan CJ, Smale DA, Krumhansl KA, Augustine S, de Bettignies F, et al. (2022) Kelp carbon sink potential decreases with warming due to accelerating decomposition. PLoS Biol 20(8): e3001702. https://doi.org/10.1371/ journal.pbio.3001702pt_PT
dc.identifier.doi10.1371/ journal.pbio.3001702pt_PT
dc.identifier.issn1544-9173
dc.identifier.issn1545-7885
dc.identifier.urihttp://hdl.handle.net/10400.8/8730
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPLOSpt_PT
dc.relation.publisherversionhttps://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3001702pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleKelp carbon sink potential decreases with warming due to accelerating decompositionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue8pt_PT
oaire.citation.titlePLOS Biologypt_PT
oaire.citation.volume20pt_PT
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