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Nutrients, light and phytoplankton succession in a temperate estuary (the Guadiana, south-western Iberia)

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dc.contributor.authorDomingues, Rita B.
dc.contributor.authorBarbosa, Ana B.
dc.contributor.authorGalvão, Helena M.
dc.date.accessioned2012-11-29T14:37:46Z
dc.date.available2012-11-29T14:37:46Z
dc.date.issued2005
dc.description.abstractSeasonal changes in freshwater flow, leading to alteration of the nutritional environment and hence affecting phytoplankton composition, will probably be enhanced in the Guadiana estuary (SW Iberia) by the recently built Alqueva dam. The main goal of this study is to assess the relationship between dissolved inorganic macronutrient concentrations and ratios, light availability and phytoplankton succession in the upper estuary of the Guadiana River prior to the completion of the dam. From April to October 2001 three locations along the upper estuary were sampled fortnightly. Several physical and chemical parameters were analysed and phytoplankton composition, abundance and biomass were determined through inverted and epifluorescence microscopy. Phytoplankton showed a uni-modal cycle with a biomass maximum during spring. A relationship between phytoplankton succession and nutrient ratios seemed to exist. In early spring, N:P was high, Si was abundant and a diatom bloom occurred. This bloom collapsed and an increase in green algae abundance was observed later in spring, with low Si and high N:P. In the summer, N:P and Si were low, and a cyanobacteria bloom developed. This bloom included the potentially toxic Microcystis. Light was probably limiting throughout the sampling period, particularly to non-motile cells. Enhancement of cyanobacteria blooms can be expected, and as the river water is used by local human populations, continued monitoring of the Guadiana estuary will be necessary to evaluate the effects of the Alqueva dam construction on phytoplankton dynamics.por
dc.identifier.citationDomingues RB, AB Barbosa and H Galvão, 2005. Nutrients, light and phytoplankton succession in a temperate estuary (the Guadiana, south-western Iberia). Estuarine Coastal and Shelf Science 64: 249-260.por
dc.identifier.otherAUT: HGA00327; ABA00694;
dc.identifier.urihttp://hdl.handle.net/10400.1/1895
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ecss.2005.02.017por
dc.subjectPhytoplanktonpor
dc.subjectSuccessionpor
dc.subjectNutrient concentrationspor
dc.subjectNutrient ratiospor
dc.subjectLightpor
dc.subjectGuadiana estuarypor
dc.subjectAlqueva dampor
dc.subjectSouth-western Iberiapor
dc.titleNutrients, light and phytoplankton succession in a temperate estuary (the Guadiana, south-western Iberia)por
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage260por
oaire.citation.startPage249por
oaire.citation.titleEstuarine Coastal and Shelf Sciencepor
oaire.citation.volume64por
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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