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Changes in the Phytoplankton Composition in a Temperate Estuarine System (1960 to 2010)

2015Journal article Restricted access
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dc.contributor.authorC. Brito, Ana
dc.contributor.authorMoita, Teresa
dc.contributor.authorGameiro, Carla
dc.contributor.authorSilva, Teresa
dc.contributor.authorAnselmo, Tânia
dc.contributor.authorBrotas, Vanda
dc.date.accessioned2020-01-19T14:24:41Z
dc.date.available2020-01-19T14:24:41Z
dc.date.issued2015
dc.description.abstractThe main aim of this study was to evaluate the temporal changes in the phytoplankton community of the Tagus Estuary and to identify the stressors involved. Environmental and phytoplankton data were gathered from several studies conducted in the 1960s, 1980s and from 1999 to 2010 (2000s). Phytoplankton data included information on the community composition through microscopy. No significant change was found between temperature and nitrogen values in the three periods. Chlorophyll a concentrations varied throughout the years, and the lowest concentrations were observed after 2004. Significant differences were also found between phytoplankton cell abundances, lower in the 1980s compared to the ones recorded in the 2000s. In the 1980s, diatoms were the most abundant group in the majority of samples and were found to be associated with nitrogen concentrations (canonical correspondence analysis), which was not observed in the 2000s. In the period 2006–2007, the importance of diatoms decreased and smaller cells became more abundant (e.g. cryptophytes, euglenophytes, prasinophytes). The ratio cryptophyta/bacillariophyta seems to yield an increase from <1 in 1980s to >1 in 2006–2007. Mesodinium rubrum and Dinophysis produce recurrent toxic blooms in the adjacent coastal area. We can speculate that the estuary can be a cryptophyte producer to sustain the cryptophytes-M. rubrum-Dinophysis trophic relationship. A top-down hypothesis (shellfish grazing) is considered to explain the change in the phytoplankton community. A quantitative tool, the Phytoplankton Community Index (PCI), yielded a significant deviation of the community, from the 1980s to the 2000s, suggesting a shift toward the dominance of small cells.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s12237-014-9900-8pt_PT
dc.identifier.issn1559-2723
dc.identifier.urihttp://hdl.handle.net/10451/41030
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectPhytoplankton communitypt_PT
dc.subjectChlorophyll apt_PT
dc.subjectLife formspt_PT
dc.subjectPhytoplankton Community Index (PCI)pt_PT
dc.subjectInvasive bivalvept_PT
dc.subjectTagus estuarypt_PT
dc.subjectPortugalpt_PT
dc.titleChanges in the Phytoplankton Composition in a Temperate Estuarine System (1960 to 2010)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1691pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage1678pt_PT
oaire.citation.titleEstuaries and Coastspt_PT
oaire.citation.volume38pt_PT
person.familyNameBrito
person.familyNameGameiro
person.familyNameSilva
person.familyNameBrotas
person.givenNameAna C.
person.givenNameCarla
person.givenNameTeresa
person.givenNameVanda
person.identifier418368
person.identifier.ciencia-idFF16-4E19-EEF4
person.identifier.ciencia-id771B-9D07-AB1A
person.identifier.ciencia-id8E1C-3DB2-13FD
person.identifier.orcid0000-0001-6539-5830
person.identifier.orcid0000-0003-2396-3929
person.identifier.orcid0000-0003-4785-5383
person.identifier.orcid0000-0001-8612-4167
person.identifier.ridF-4473-2011
person.identifier.ridB-5462-2012
person.identifier.ridA-2410-2012
person.identifier.scopus-author-id26431242400
person.identifier.scopus-author-id20734253500
person.identifier.scopus-author-id6602078736
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication99a1ebf9-0208-4be2-8dda-e5ba8e9be92c
relation.isAuthorOfPublication39490eaa-c76a-4478-9ff0-844df5fb91ca
relation.isAuthorOfPublication10289fb1-941d-45ba-a3d7-c4e00b91c85a
relation.isAuthorOfPublicatione0a1924d-aefc-4c25-a932-1f7602f55b53
relation.isAuthorOfPublication.latestForDiscovery10289fb1-941d-45ba-a3d7-c4e00b91c85a

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