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Decreasing carbonate load of seagrass leaves with increasing latitude

2019-12Journal article Restricted access
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dc.contributor.authorMazarrasa, Ines
dc.contributor.authorMarba, Nuria
dc.contributor.authorKrause-Jensen, Dorte
dc.contributor.authorKennedy, Hilary
dc.contributor.authorSantos, Rui
dc.contributor.authorLovelock, Catherine E.
dc.contributor.authorDuarte, Carlos M.
dc.date.accessioned2020-07-24T10:50:46Z
dc.date.available2020-07-24T10:50:46Z
dc.date.issued2019-12
dc.description.abstractSeagrass meadows play a significant role in the formation of carbonate sediments, serving as a substrate for carbonate-producing epiphyte communities. The magnitude of the epiphyte load depends on plant structural and physiological parameters, related to the time available for epiphyte colonization. Yet, the carbonate accumulation is likely to also depend on the carbonate saturation state of seawater (Omega) that tends to decrease as latitude increases due to decreasing temperature and salinity. A decrease in carbonate accumulation with increasing latitude has already been demonstrated for other carbonate producing communities. The aim of this study was to assess whether there was any correlation between latitude and the epiphyte carbonate load and net carbonate production rate on seagrass leaves. Shoots from 8 different meadows of the Zostera genus distributed across a broad latitudinal range (27 degrees S to up to 64 degrees N) were sampled along with measurements of temperature and Omega. The Omega within meadows significantly decreased as latitude increased and temperature decreased. The mean carbonate content and load on seagrass leaves ranged from 17% DW to 36% DW and 0.4-2.3 mg CO3 cm(-2), respectively, and the associated mean carbonate net production rate varied from 0.007 to 0.9 mg CO3 cm(-2) d(-1). Mean carbonate load and net production rates decreased from subtropical and tropical, warmer regions towards subpolar latitudes, consistent with the decrease in Omega. These results point to a latitudinal variation in the contribution of seagrass to the accumulation of carbonates in their sediments which affect important processes occurring in seagrass meadows, such as nutrient cycling, carbon sequestration and sediment accretion.
dc.description.sponsorshipGovernment of the Balearic Islands
dc.description.sponsorshipCOCOA project under the BONUS program - EU 7th framework programEuropean Union (EU)
dc.description.sponsorshipDanish Research CouncilDet Frie Forskningsrad (DFF)
dc.description.sponsorshipFoundation of Science and Technology of Portugal (FCT) [PTDC/MAR-EST/3223/2014]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.aquabot.2019.103147
dc.identifier.issn0304-3770
dc.identifier.issn1879-1522
dc.identifier.urihttp://hdl.handle.net/10400.1/14151
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectOcean Acidification
dc.subjectThalassia-Testudinum
dc.subjectMg-Calcite
dc.subjectTemperature
dc.subjectSeawater
dc.subjectSediments
dc.subjectMeadows
dc.subjectWater
dc.subjectMud
dc.subjectCommunities
dc.titleDecreasing carbonate load of seagrass leaves with increasing latitude
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage103147
oaire.citation.titleAquatic Botany
oaire.citation.volume159
person.familyNameSantos
person.givenNameRui
person.identifier42560
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7201375018
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery84487ca8-404a-4584-81f0-3662c340d712

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