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A tale of two spartinas: Climatic, photobiological and isotopic insights on the fitness of non-indigenous versus native species

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dc.contributor.authorDuarte, Bernardo
dc.contributor.authorBaeta, Alexandra
dc.contributor.authorRousseau-Gueutin, M.
dc.contributor.authorAinouche, M.
dc.contributor.authorMarques, J. C.
dc.contributor.authorCaçador, Isabel
dc.date.accessioned2020-01-19T14:55:54Z
dc.date.available2020-01-19T14:55:54Z
dc.date.issued2015
dc.description.abstractSalt marshes are facing a new threat: the invasion by non-indigenous species (NIS), Although its introduction time is not established yet, in 1999 Spartina versicolor was already identified as a NIS in the Mediterranean marshes, significantly spreading its area of colonization. Using the Mediterranean native Spartina maritima as a reference, the present research studied the ecophysiological fitness of this NIS in its new environment, as a tool to understand its potential invasiveness. It was found that Spartina versicolor had a stable photobiological pattern, with only minor fluctuations during an annual cycle, and lower efficiencies comparated to S. maritima. The NIS seems to be rather insensitive to the observed abiotic factors fluctuations (salinity and pH of the sediment), and thus contrasts with the native S. maritima, known to be salinity dependent with higher productivity values in higher salinity environments. Most of the differences observed between the photobiology of these species could be explained by their nitrogen nutrition (here evaluated by the δ15N stable isotope) and directly related with the Mediterranean climate. Enhanced by a higher N availability during winter, the primary production of S. maritima which lead to dilution of the foliar δ15N concentration in the newly formed biomass, similarly to what is observed along a rainfall gradient. On the other hand, S. versicolor showed an increased δ15N in its tissues along the annual rainfall gradient, probably due to a δ15N concentration effect during low biomass production periods (winter and autumn). Together with the photobiological traits, these isotopic data point out to a climatic misfit of S. versicolor to the Mediterranean climate compared to the native S. maritima. This appears to be the major constrain shaping the ecophysiological fitness of this NIS, its primary production and consequently, its spreading rate along the Mediterranean marshes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ecss.2015.06.015pt_PT
dc.identifier.issn0272-7714
dc.identifier.urihttp://hdl.handle.net/10451/41055
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectS. maritimapt_PT
dc.subjectS. versicolorpt_PT
dc.subjectPhotosynthesispt_PT
dc.subjectN nutritionpt_PT
dc.subjectEcophysiological fitnesspt_PT
dc.titleA tale of two spartinas: Climatic, photobiological and isotopic insights on the fitness of non-indigenous versus native speciespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage190pt_PT
oaire.citation.startPage178pt_PT
oaire.citation.titleEstuarine, Coastal and Shelf Sciencept_PT
oaire.citation.volume167pt_PT
person.familyNameDuarte
person.familyNameBaeta
person.familyNameMARQUES
person.familyNameCaçador
person.givenNameBernardo
person.givenNameAlexandra
person.givenNameJOÃO CARLOS
person.givenNameIsabel
person.identifier89449
person.identifier134821
person.identifier.ciencia-id731E-093F-D4C8
person.identifier.ciencia-id9F11-7A1E-BEEC
person.identifier.ciencia-id631C-9FFE-CA81
person.identifier.orcid0000-0003-1914-7435
person.identifier.orcid0000-0001-9898-9096
person.identifier.orcid0000-0001-8865-8189
person.identifier.orcid0000-0002-4475-6091
person.identifier.ridH-2001-2011
person.identifier.ridQ-6704-2018
person.identifier.ridL-9478-2014
person.identifier.ridC-2618-2012
person.identifier.scopus-author-id20734149900
person.identifier.scopus-author-id8891736800
person.identifier.scopus-author-id7203032961
person.identifier.scopus-author-id6602533871
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa72f0f40-c224-49ad-ba21-ebb5f9aab09c
relation.isAuthorOfPublication70e942b1-deda-4048-bf93-1addef27442e
relation.isAuthorOfPublication97130a55-0383-4d1b-8d73-4a5ca889e529
relation.isAuthorOfPublication02ecb390-88b9-4e2f-8690-eba66c3b5311
relation.isAuthorOfPublication.latestForDiscovery97130a55-0383-4d1b-8d73-4a5ca889e529

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