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Nutrient limitation of phytoplankton growth in the freshwater tidal zone of a turbid, Mediterranean estuary

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dc.contributor.authorDomingues, Rita B.
dc.contributor.authorAnselmo, Tânia P.
dc.contributor.authorBarbosa, Ana B.
dc.contributor.authorSommer, Ulrich
dc.contributor.authorGalvão, Helena M.
dc.date.accessioned2012-11-29T14:50:00Z
dc.date.available2012-11-29T14:50:00Z
dc.date.issued2011
dc.description.abstractIdentification of the limiting nutrient(s) is a requirement for the rational management of eutrophication. Here, we present the first experimental analysis of nutrient limitation of phytoplankton growth and its seasonal variation in the Guadiana estuary (SE Portugal-SW Spain). Ten microcosm experiments were performed during 2005 and 2008, using water samples collected in the freshwater tidal zone of the Guadiana estuary. Nitrate, phosphate and silicate were added in a single pulse, alone and in combinations. Experimental treatments were incubated for 4 days under controlled laboratory conditions. Phytoplankton response to nutrient enrichment was evaluated through changes in biomass (Chla), and abundance of specific phytoplankton groups. Overall, phytoplankton growth seemed to be nitrogen-limited throughout the productive period, especially green algae in 2005 and diatoms in 2008. In the summer 2008, cyanobacteria and the harmful dinoflagellate Kryptoperidinium foliaceum responded to N enrichment in the absence of Si. Indeed, the presence of K. foliaceum was observed for the first time in the freshwater tidal reaches of the Guadiana estuary, where dinoflagellates were usually absent or rare. The significant increase on dinoflagellates and cyanobacteria growth in response to N enrichment in the absence of Si is alarming, because anthropogenic nutrient enrichments usually increase N and P, but not Si. Furthermore, relatively high N concentrations, up to 22 mM, were found to be limiting to phytoplankton growth. These results should therefore be used as a management tool when establishing nutrient criteria and nutrient loading budgets to estuarine waters.por
dc.identifier.citationDomingues RB, TP Anselmo, AB Barbosa, U Sommer and HM Galvão, 2011. Nutrient limitation of phytoplankton in the freshwater tidal zone of a turbid, Mediterranean estuary. Estuarine, Coastal and Shelf Science 91 (2): 282-297.por
dc.identifier.otherAUT: HGA00327; ABA00694;
dc.identifier.urihttp://hdl.handle.net/10400.1/1898
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Ltd.por
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ecss.2010.10.033por
dc.subjectPhytoplanktonpor
dc.subjectNutrient limitationpor
dc.subjectNutrient enrichmentpor
dc.subjectEutrophicationpor
dc.subjectFreshwater tidal estuarypor
dc.subjectGuadiana estuarypor
dc.titleNutrient limitation of phytoplankton growth in the freshwater tidal zone of a turbid, Mediterranean estuarypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage297por
oaire.citation.issue2por
oaire.citation.startPage282por
oaire.citation.titleEstuarine, Coastal and Shelf Sciencepor
oaire.citation.volume91por
person.familyNameDomingues
person.familyNameBarbosa
person.familyNameGalvão
person.givenNameRita
person.givenNameAna
person.givenNameHelena
person.identifier640932
person.identifier1291299
person.identifier.ciencia-id7417-4EEC-3408
person.identifier.ciencia-idF514-2180-4CF8
person.identifier.ciencia-idC51A-2C5A-CF8D
person.identifier.orcid0000-0002-7107-8222
person.identifier.orcid0000-0002-7402-246X
person.identifier.orcid0000-0003-0939-8994
person.identifier.scopus-author-id8627143500
person.identifier.scopus-author-id7103244778
person.identifier.scopus-author-id6505974701
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication43632aa6-ab1f-4c52-8737-dc069bc29291
relation.isAuthorOfPublication5b72648c-41b5-46c0-9a7f-7fa2f514b973
relation.isAuthorOfPublicationef31f343-34f9-4aec-a095-e070235d23b3
relation.isAuthorOfPublication.latestForDiscovery43632aa6-ab1f-4c52-8737-dc069bc29291

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