Repository logo
 
Publication

Phytoplankton composition, growth and production in the Guadiana estuary (SW Iberia): unraveling changes induced after dam construction

2012Journal article Restricted
Simple item page
dc.contributor.authorDomingues, Rita B.
dc.contributor.authorBarbosa, Ana B.
dc.contributor.authorSommer, Ulrich
dc.contributor.authorGalvão, Helena M.
dc.date.accessioned2012-11-29T15:11:01Z
dc.date.available2012-11-29T15:11:01Z
dc.date.issued2012
dc.description.abstractWater quality and quantity problems in the Guadiana estuary due to a recently built dam have been predicted, including an enhancement of cyanobacteria blooms. The main goal of this work was thus to describe the present phytoplankton dynamics in relation to its environmental drivers and to evaluate the effects of damming on phytoplankton in the Guadiana estuary. Sampling campaigns were conducted during 2007–2009 in 4 locations of the Guadiana estuary, covering the salinity gradient. Phytoplankton-related and physical–chemical variables were analyzed. Throughout our study, light availability was mainly controlled by suspended sediments and it was much lower than saturating intensities described for phytoplankton growth. Therefore, light was probably limiting to phytoplankton growth throughout the year, especially in the middle and upper estuarine zones. Nitrogen limitation of phytoplankton growth occurred occasionally throughout the study period, especially during spring and summer. Overall, light and nutrient availability were mainly controlled by river flow; anthropogenic sources of nutrients to the estuary were negligible. Phytoplankton showed a unimodal cycle with biomass maximum in late spring/early summer, and the typical seasonal succession of freshwater phytoplankton (diatoms, green algae, cyanobacteria) was observed. Diatoms were the main component of the phytoplankton community and their variability closely followed nitrate and river flow variability. The relative abundance of the main phytoplankton groups changed in relation to the period before dam construction, with a decrease on cyanobacteria contribution to total abundance. The environmental perturbation induced by dam construction has now stabilized and resulted in an overall decrease in nutrient concentrations, an increase in light availability and a decrease in cyanobacteria abundance.por
dc.identifier.citationDomingues RB, AB Barbosa, U Sommer and HM Galvão, 2012. Phytoplankton composition, growth and production in the Guadiana estuary (SW Iberia): Unraveling changes induced after dam construction, Science of the Total Environment, 416: 300-313.por
dc.identifier.otherAUT: HGA00327; ABA00694;
dc.identifier.urihttp://hdl.handle.net/10400.1/1913
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier B.V.por
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.scitotenv.2011.11.043por
dc.subjectPhytoplanktonpor
dc.subjectDam constructionpor
dc.subjectEstuariespor
dc.subjectNutrientspor
dc.subjectLightpor
dc.subjectAnthropogenic impactspor
dc.titlePhytoplankton composition, growth and production in the Guadiana estuary (SW Iberia): unraveling changes induced after dam constructionpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage313por
oaire.citation.startPage300por
oaire.citation.titleScience of the Total Environmentpor
oaire.citation.volume416por
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.latestForDiscoveryef31f343-34f9-4aec-a095-e070235d23b3

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Domingues et al 2012 Sci Tot Environm.pdf
Size:
3.36 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

FCT2-Artigos (em revistas ou actas indexadas)
CIM2-Artigos (em revistas ou actas indexadas)