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Effects of external nutrient sources and extreme weather events on the nutrient budget of a Southern European coastal lagoon

2017-03Journal article Open access
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dc.contributor.authorMalta, Erik-jan
dc.contributor.authorStigter, Tibor Y.
dc.contributor.authorPacheco, André
dc.contributor.authorCarvalho Dill, Amélia
dc.contributor.authorTavares, Diogo
dc.contributor.authorSantos, Rui
dc.date.accessioned2018-12-07T14:53:39Z
dc.date.available2018-12-07T14:53:39Z
dc.date.issued2017-03
dc.description.abstractThe seasonal and annual nitrogen (N), phosphorus (P), and carbon (C) budgets of the mesotidal Ria Formosa lagoon, southern Portugal, were estimated to reveal the main inputs and outputs, the seasonal patterns, and how they may influence the ecological functioning of the system. The effects of extreme weather events such as long-lasting strong winds causing upwelling and strong rainfall were assessed. External nutrient inputs were quantified; ocean exchange was assessed in 24-h sampling campaigns, and final calculations were made using a hydrodynamic model of the lagoon. Rain and stream inputs were the main freshwater sources to the lagoon. However, wastewater treatment plant and groundwater discharges dominated nutrient input, together accounting for 98, 96, and 88 % of total C, N, and P input, respectively. Organic matter and nutrients were continuously exported to the ocean. This pattern was reversed following extreme events, such as strong winds in early summer that caused upwelling and after a period of heavy rainfall in late autumn. A principal component analysis (PCA) revealed that ammonium and organic N and C exchange were positively associated with temperature as opposed to pH and nitrate. These variables reflected mostly the benthic lagoon metabolism, whereas particulate P exchange was correlated to Chl a, indicating that this was more related to phytoplankton dynamics. The increase of stochastic events, as expected in climate change scenarios, may have strong effects on the ecological functioning of coastal lagoons, altering the C and nutrient budgets.
dc.description.sponsorshipPortuguese Science and Technology Foundation (FCT) [POCI/MAR/58427/2004, PPCDT/MAR/58427/2004]; Portuguese Science and Technology Foundation (FCT)
dc.identifier.doi10.1007/s12237-016-0150-9
dc.identifier.issn1559-2723
dc.identifier.issn1559-2731
dc.identifier.urihttp://hdl.handle.net/10400.1/11620
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.subjectSubmarine Groundwater Discharge
dc.subjectNorthern Adriatic Sea
dc.subjectRia-Formosa
dc.subjectSeagrass Meadows
dc.subjectOrganic-Matter
dc.subjectNitrogen
dc.subjectWater
dc.subjectEcosystem
dc.subjectPortugal
dc.subjectEstuary
dc.titleEffects of external nutrient sources and extreme weather events on the nutrient budget of a Southern European coastal lagoon
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FMAR%2F58427%2F2004/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PPCDT%2FMAR%2F58427%2F2004/PT
oaire.citation.endPage436
oaire.citation.issue2
oaire.citation.startPage419
oaire.citation.titleEstuaries and Coasts
oaire.citation.volume40
oaire.fundingStreamPOCI
oaire.fundingStream3599-PPCDT
person.familyNameMalta
person.familyNamePacheco
person.familyNameCarvalho Dill
person.familyNameSantos
person.givenNameErik-jan
person.givenNameAndré
person.givenNameAmélia
person.givenNameRui
person.identifier42560
person.identifier.ciencia-id8014-35C4-8806
person.identifier.ciencia-idD31D-3A23-5262
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-3934-3807
person.identifier.orcid0000-0002-8340-0629
person.identifier.orcid0000-0002-5834-4450
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridF-2485-2014
person.identifier.ridM-6762-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7003607705
person.identifier.scopus-author-id55432603300
person.identifier.scopus-author-id7201375018
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
rcaap.rightsopenAccess
rcaap.typearticle
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