Delimitation of domains in the external Río de la Plata estuary, involving phytoplanktonic and hydrographic variables
| Title: | Delimitation of domains in the external Río de la Plata estuary, involving phytoplanktonic and hydrographic variables |
|---|---|
| Authors: | Martínez, Ana, Ortega, Leonardo |
| Source: | Brazilian Journal of Oceanography. September 2015 63(3) |
| Publisher Information: | Universidade de São Paulo, Instituto Oceanográfico, 2015. |
| Publication Year: | 2015 |
| Subject Terms: | Río de la Plata, chlorophyll, fronts, domains, Uruguayan shelf |
| More Details: | utumn and spring hydrological (temperature and salinity) and biological (chlorophyll, phaeopigments and phytoplankton species) variables were analysed. Phytoplankton biomass, expressed as chlorophyll a reach a maximum of 6.1 µg L-1in autumn and 22.8 µg L-1 during spring. Maxima were found in the frontal zone and marine adjacent area. Four domains were identified through multivariate analysis: Riverine, Estuarine, Frontal and Oceanic; mainly due to salinity and depth in autumn and due to salinity and chlorophyll in spring. The Riverine and Oceanic domains (West and East boundaries) matched in location in both seasons, while in spring an additional domain was discerned in the Canal Oriental (Channel domain). Salinity and chlorophyll concentration increased from the Riverine to the Frontal domain, being positively correlated for salinities 14, indicating that chlorophyll concentration was modulated mainly by the oceanic influence that improved light availability. While salinity maintains an increasing trend toward the Oceanic domain, phytoplankton biomass decreases. Though in this zone the chlorophyll concentration must be regulated by a combination of light availability and grazing, further investigation is needed. |
| Document Type: | article |
| File Description: | text/html |
| Language: | English |
| ISSN: | 1679-8759 |
| DOI: | 10.1590/S1679-87592015086106303 |
| Access URL: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592015000300217 |
| Rights: | info:eu-repo/semantics/openAccess |
| Accession Number: | edssci.S1679.87592015000300217 |
| Database: | SciELO |
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| Items | – Name: Title Label: Title Group: Ti Data: Delimitation of domains in the external Río de la Plata estuary, involving phytoplanktonic and hydrographic variables – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Martínez%2C+Ana%22">Martínez, Ana</searchLink><br /><searchLink fieldCode="AR" term="%22Ortega%2C+Leonardo%22">Ortega, Leonardo</searchLink> – Name: TitleSource Label: Source Group: Src Data: <i>Brazilian Journal of Oceanography</i>. September 2015 63(3) – Name: Publisher Label: Publisher Information Group: PubInfo Data: Universidade de São Paulo, Instituto Oceanográfico, 2015. – Name: DatePubCY Label: Publication Year Group: Date Data: 2015 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Río+de+la+Plata%22">Río de la Plata</searchLink><br /><searchLink fieldCode="DE" term="%22chlorophyll%22">chlorophyll</searchLink><br /><searchLink fieldCode="DE" term="%22fronts%22">fronts</searchLink><br /><searchLink fieldCode="DE" term="%22domains%22">domains</searchLink><br /><searchLink fieldCode="DE" term="%22Uruguayan+shelf%22">Uruguayan shelf</searchLink> – Name: Abstract Label: Description Group: Ab Data: utumn and spring hydrological (temperature and salinity) and biological (chlorophyll, phaeopigments and phytoplankton species) variables were analysed. Phytoplankton biomass, expressed as chlorophyll a reach a maximum of 6.1 µg L-1in autumn and 22.8 µg L-1 during spring. Maxima were found in the frontal zone and marine adjacent area. Four domains were identified through multivariate analysis: Riverine, Estuarine, Frontal and Oceanic; mainly due to salinity and depth in autumn and due to salinity and chlorophyll in spring. The Riverine and Oceanic domains (West and East boundaries) matched in location in both seasons, while in spring an additional domain was discerned in the Canal Oriental (Channel domain). Salinity and chlorophyll concentration increased from the Riverine to the Frontal domain, being positively correlated for salinities 14, indicating that chlorophyll concentration was modulated mainly by the oceanic influence that improved light availability. While salinity maintains an increasing trend toward the Oceanic domain, phytoplankton biomass decreases. Though in this zone the chlorophyll concentration must be regulated by a combination of light availability and grazing, further investigation is needed. – Name: TypeDocument Label: Document Type Group: TypDoc Data: article – Name: Format Label: File Description Group: SrcInfo Data: text/html – Name: Language Label: Language Group: Lang Data: English – Name: ISSN Label: ISSN Group: ISSN Data: 1679-8759 – Name: DOI Label: DOI Group: ID Data: 10.1590/S1679-87592015086106303 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592015000300217" linkWindow="_blank">http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592015000300217</link> – Name: Copyright Label: Rights Group: Cpyrght Data: info:eu-repo/semantics/openAccess – Name: AN Label: Accession Number Group: ID Data: edssci.S1679.87592015000300217 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1590/S1679-87592015086106303 Languages: – Text: English Subjects: – SubjectFull: Río de la Plata Type: general – SubjectFull: chlorophyll Type: general – SubjectFull: fronts Type: general – SubjectFull: domains Type: general – SubjectFull: Uruguayan shelf Type: general Titles: – TitleFull: Delimitation of domains in the external Río de la Plata estuary, involving phytoplanktonic and hydrographic variables Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Martínez, Ana – PersonEntity: Name: NameFull: Ortega, Leonardo IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 16798759 Numbering: – Type: volume Value: 63 – Type: issue Value: 3 Titles: – TitleFull: Brazilian Journal of Oceanography Type: main |
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