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Monitoring of oxygen condition in the Ria Formosa coastal lagoon, Portugal

dc.contributor.authorNewton, Alice
dc.contributor.authorOliveira, P. S.
dc.contributor.authorIcely, John
dc.contributor.authorFoster, P. A.
dc.date.accessioned2012-03-24T08:29:11Z
dc.date.available2012-03-24T08:29:11Z
dc.date.issued2010
dc.date.updated2012-02-29T20:01:59Z
dc.description.abstractDissolved oxygen (DO) is one of the most important environmental variables of water quality, especially for marine life. Consequently, oxygen is one of the Chemical Quality Elements required for the implementation of European Union Water Framework Directive. This study uses the example of the Ria Formosa, a meso-tidal lagoon on the south coast of Portugal to demonstrate how monitoring of water quality for coastal waters must be well designed to identify symptoms of episodic hypoxia. New data from the western end of the Ria Formosa were compared to values in a database of historical data and in the published literature to identify long-term trends. The dissolved oxygen concentration values in the database and in the literature were generally higher than those found in this study, where episodic hypoxia was observed during the summer. Analysis of the database showed that the discrepancy was probably related with the time and the sites where the samples had been collected, rather than a long-term trend. The most problematic situations were within the inner lagoon near the city of Faro, where episodic hypoxia (<2 mg dm3 DO) occurred regularly in the early morning. These results emphasise the need for a balanced sampling strategy for oxygen monitoring which includes all periods of the day and night, as well as a representative range of sites throughout the lagoon. Such a strategy would provide adequate data to apply management measures to reduce the risk of more persistent hypoxia that would impact on the ecological, important natural resource. economic and leisure uses of this Important natural resource.por
dc.identifier.citationNewton, Alice; Oliveira, P.S.; Icely, J.D.; Foster, P.A. Monitoring of oxygen condition in the Ria Formosa coastal lagoon, Portugal. Journal of Environmental Monitoring, 12, 1, 355-360, 2010por
dc.identifier.issn1464-0325
dc.identifier.otherAUT: ANE00265;
dc.identifier.urihttp://hdl.handle.net/10400.1/953
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherRoyal Society of Chemistrypor
dc.titleMonitoring of oxygen condition in the Ria Formosa coastal lagoon, Portugalpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage360por
oaire.citation.issue12por
oaire.citation.startPage355por
oaire.citation.titleJournal of Environmental Monitoringpor
person.familyNameNewton
person.familyNameIcely
person.givenNameAlice
person.givenNameJohn
person.identifier333937
person.identifier.ciencia-id6F13-1247-B2B7
person.identifier.orcid0000-0001-9286-5914
person.identifier.orcid0000-0002-9114-8283
person.identifier.scopus-author-id7201391894
person.identifier.scopus-author-id6506626316
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication636c0a22-6cf2-4324-a704-64777269e97d
relation.isAuthorOfPublicationd8d4a6eb-57ae-440b-99b9-5f981d237cdf
relation.isAuthorOfPublication.latestForDiscovery636c0a22-6cf2-4324-a704-64777269e97d

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