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Water quality of a southwest Iberian coastal lagoon: Spatial and temporal variability

2022-08Journal article Open access
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dc.contributor.authorRosa, Alexandra
dc.contributor.authorCravo, Alexandra
dc.contributor.authorCorreia, Cátia
dc.contributor.authorJacob, José
dc.date.accessioned2022-12-12T11:31:37Z
dc.date.available2022-12-12T11:31:37Z
dc.date.issued2022-08
dc.description.abstractThe present work aims to characterize Ria Formosa water quality considering its spatial, and temporal variability at two scales: short-term (among seasons) and long-term to evaluate its evolution over the past 40 years, by comparing six historical datasets with data obtained in this study. To attain these goals, four field surveys under different seasons and/or weather conditions were conducted between 2017 and 2019 at seven sites along the Ria Formosa, covering the water bodies specified for this system. In situ measurements (temperature, salinity, pH and dissolved oxygen) and water sampling for determination of nutrients, chlorophyll a and suspended solids were taken every 2 h at each site, during complete semidiurnal tidal cycles. Moreover, these data were complemented with in situ data acquired at a high frequency (every 15 min) by a real time observational station deployed at an inner area, close to a main channel, where the anthmpogenic pressure is more intense. Data analysis clearly depict a spatial variability pattern along the Ria Formosa, as well as a temporal heterogeneity, influenced by the contribution of precipitation, sediments, wind and water exchanges with the adjacent ocean. Between sampling sites, the lowest variability of water quality parameters occurred at the boundary coastal station, at the main inlet, in permanent connection with the ocean, while the maximum variability was found at both the lagoon edges, mainly due to the shallowness of the water column. Temporally, the highest concentrations of nutrients were obtained during the Wet/rainy conditions survey, under the influence of runoff. The lowest concentrations of nutrients were attained during the Summer, except for phosphate, due to consumption by phytoplankton. Although the sampling frequency along time has been limited, Ria Formosa water quality data from the last 40 years shows a decreasing trend in nutrients concentration and a marginal increase of dissolved oxygen, suggesting a water quality improvement over time, in contrast with other coastal lagoons that are showing a water quality deterioration due to an increasing anthropogenic pressure. Altogether, these are relevant aspects to consider regarding Ria Formosa present and future management, including climate change and anthropogenic pressures susceptibility assessment and to use them within an international context by comparison with other similar systems.pt_PT
dc.description.sponsorshipM1420-01-0145-FEDER-000001
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.csr.2022.104804pt_PT
dc.identifier.eissn1873-6955
dc.identifier.urihttp://hdl.handle.net/10400.1/18623
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPergamon - Elsevierpt_PT
dc.relationUBEST - Understanding the biogeochemical buffering capacity of estuaries relative to climate change and anthropogenic inputs
dc.relationAquatic Research Infrastructure Network
dc.relationCentre for Marine and Environmental Research (CIMA)
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectCoastal lagoonpt_PT
dc.subjectRia formosapt_PT
dc.subjectWater qualitypt_PT
dc.subjectTRIXpt_PT
dc.subjectNutrientspt_PT
dc.subjectChlorophyll apt_PT
dc.titleWater quality of a southwest Iberian coastal lagoon: Spatial and temporal variabilitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleUBEST - Understanding the biogeochemical buffering capacity of estuaries relative to climate change and anthropogenic inputs
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardTitleCentre for Marine and Environmental Research (CIMA)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAG-MAA%2F6899%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00350%2F2020/PT
oaire.citation.startPage104804pt_PT
oaire.citation.titleContinental Shelf Researchpt_PT
oaire.citation.volume245pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameRosa
person.familyNameCravo
person.familyNameCorreia
person.familyNameJacob
person.givenNameAlexandra
person.givenNameAlexandra
person.givenNameCátia
person.givenNameJosé
person.identifier.ciencia-id7B17-2CD2-0154
person.identifier.ciencia-id7419-EE20-8039
person.identifier.ciencia-id3017-A30B-6C8E
person.identifier.ciencia-id7210-CCF6-4C5E
person.identifier.orcid0000-0003-4443-9405
person.identifier.orcid0000-0002-2569-3929
person.identifier.orcid0000-0002-2228-5292
person.identifier.orcid0000-0001-9718-7470
person.identifier.scopus-author-id36552467800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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