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Competition for nitrogen between the seaweed Caulerpa prolifera and the seagrass Cymodocea nodosa

2020-08Journal article Restricted access
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dc.contributor.authorAlexandre, Ana
dc.contributor.authorSantos, Rui
dc.date.accessioned2021-06-24T11:35:20Z
dc.date.available2021-06-24T11:35:20Z
dc.date.issued2020-08
dc.description.abstractThe rhizophytic seaweed Caulerpa prolifera has been expanding rapidly in the Ria Formosa lagoon, southern Portugal, taking over deeper unvegetated areas and mixing with the native seagrass Cymodocea nodosa in shallower areas. In the Ria Formosa lagoon, belowground ammonium uptake from the sediment represents the main source of nitrogen for the 2 macrophytes, except during the ammonium pulses from the sediment to the water column that are incorporated through aboveground plant parts. We examined the competition for inorganic and organic nitrogen between C. prolifera and C. nodosa through a series of N-15-ammonium and N-15-amino acid surge uptake experiments combining single-species and mixed incubations at a range of nutrient concentrations. Our results showed that C. prolifera is generally faster than C. nodosa in the acquisition of ammonium and amino acids by both above- and belowground parts, and that the uptake rates of ammonium and amino acids of one species were not affected by the presence of the other species. The exception was the amino acid uptake through the rhizoids of C. prolifera, which was slightly enhanced in the presence of C. nodosa. In this situation, the aboveground ammonium uptake becomes the main contributor to the nitrogen budget of C. nodosa but not to that of C. prolifera. When ammonium pulses are considered, C. nodosa is more competitive for nitrogen than C. prolifera. In this case, the leaf uptake of ammonium is the largest contributor to the total nitrogen (ammonium plus amino acids) budget of the seagrass. Our results showed that the different nutritional strategies of the 2 macrophytes allow their coexistence in the Ria Formosa lagoon.
dc.description.sponsorshipClear Reef Social Fund for Marine Research and Conservation
dc.description.versioninfo:eu-repo/semantics/submittedVersion
dc.identifier.doi10.3354/meps13429
dc.identifier.issn0171-8630
dc.identifier.urihttp://hdl.handle.net/10400.1/16411
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter Research
dc.relationEFFECTS OF OCEAN ACIDIFICATION ON THE NITROGEN BUDGET OF SEAGRASSES: ROLE OF ORGANIC VS. INORGANIC SOURCES
dc.relationNot Available
dc.relationAlgarve Centre for Marine Sciences
dc.subjectNitrogen uptake
dc.subjectCaulerpa prolifera
dc.subjectCymodocea nodosa
dc.subjectCompetition
dc.subjectInteractions
dc.subjectAmino acids
dc.subjectAmmonium
dc.subjectRia Formosa
dc.subject.otherEnvironmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography
dc.titleCompetition for nitrogen between the seaweed Caulerpa prolifera and the seagrass Cymodocea nodosa
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleEFFECTS OF OCEAN ACIDIFICATION ON THE NITROGEN BUDGET OF SEAGRASSES: ROLE OF ORGANIC VS. INORGANIC SOURCES
oaire.awardTitleNot Available
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F91629%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL 57%2F2016%2FCP1361%2FCT0001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR-EST%2F3223%2F2014/PT
oaire.citation.endPage134
oaire.citation.startPage125
oaire.citation.titleMarine Ecology Progress Series
oaire.citation.volume648
oaire.fundingStreamDL 57/2016
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
person.familyNameAlexandre
person.familyNameSantos
person.givenNameAna
person.givenNameRui
person.identifier42560
person.identifier.ciencia-idA711-4AF6-8F36
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0001-7164-1487
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id35836826900
person.identifier.scopus-author-id7201375018
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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