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Interactions between seagrasses and seaweeds during surge nitrogen acquisition determine interspecific competition

2017-10Journal article Open access
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dc.contributor.authorAlexandre, Ana
dc.contributor.authorBaeta, Alexandra
dc.contributor.authorEngelen, Aschwin H.
dc.contributor.authorSantos, Rui
dc.date.accessioned2018-12-07T14:58:08Z
dc.date.available2018-12-07T14:58:08Z
dc.date.issued2017-10
dc.description.abstractSeagrasses dominate shallow coastal environments where nitrogen (N) availability in the water column is often sporadic and mainly in the form of pulses. We investigated the N uptake competition between seagrasses and seaweeds through a series of N-15 surge uptake experiments combining single-species and mixed incubations across ammonium concentrations. N surge uptake rates of seagrasses were 2 to 14-fold higher than those of seaweeds in the majority of combinations, showing that seagrasses are generally in a competitive advantage over seaweeds in N-poor environments with N-pulses. No threshold concentration of ammonium was found beyond which seaweeds performed better than seagrasses. Mixed incubations revealed interspecific interactions that affected rates positively and negatively. Uptake rates obtained in single-species incubations, therefore, cannot always be used to predict the outcome of uptake competition. Only two (Zostera marina vs. Ulva rotundata and Zostera marina vs. Codium decorticatum) of the nine combinations tested (Z. marina, Z. noltei and Cymodocea nodosa vs. U. rotundata, C. decorticatum and Dictyota dichotoma) were found to enhance macroalgal uptake. Our results showed that the surge uptake capacity of seagrasses represents an important mechanism in their N acquisition strategy that justifies their dominance in shallow oligotrophic environments.
dc.description.sponsorshipPortuguese Foundation for Science and Technology (FCT) [PTDC/MAR/098069/2008, SFRH/BPD/63703/2009]; FCT - Foundation for Science and Technology [CCMAR/Multi/04326/2013]
dc.identifier.doi10.1038/s41598-017-13962-4
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/10400.1/11873
dc.language.isoeng
dc.peerreviewedyes
dc.publisherNature Publishing Group
dc.subjectEelgrass zostera marina
dc.subjectTransient ammonium uptake
dc.subjectLagoon Ria Formosa
dc.subjectInorganic nitrogen
dc.subjectCoastal lagoon
dc.subjectUlva lactuca
dc.subjectCaulerpa racemosa
dc.subjectUptake kinetics
dc.subjectGrowth
dc.subjectNoltii
dc.titleInteractions between seagrasses and seaweeds during surge nitrogen acquisition determine interspecific competition
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage13651
oaire.citation.titleScientific Reports
oaire.citation.volume7
person.familyNameAlexandre
person.familyNameBaeta
person.familyNameEngelen
person.familyNameSantos
person.givenNameAna
person.givenNameAlexandra
person.givenNameAschwin
person.givenNameRui
person.identifier42560
person.identifier.ciencia-idA711-4AF6-8F36
person.identifier.ciencia-id911A-9A0C-744D
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0001-7164-1487
person.identifier.orcid0000-0001-9898-9096
person.identifier.orcid0000-0002-9579-9606
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridQ-6704-2018
person.identifier.ridM-3432-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id35836826900
person.identifier.scopus-author-id8891736800
person.identifier.scopus-author-id6701622770
person.identifier.scopus-author-id7201375018
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication2a0b8d0c-7769-40f5-9d0a-8b7e92929aa9
relation.isAuthorOfPublication33d5a223-f2c9-4c68-984f-9213f15a05b0
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscoveryc907d7fb-323d-4227-84b7-f46c150d05f4

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