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dc.contributor.authorRodriguez da Costa, Adila Kelly
dc.contributor.authorCajueiro Carneiro Pereira, Luci
dc.contributor.authorJiménez Quintana, José Antonio
dc.contributor.authorGomes de Oliveira, Antonio Rafael
dc.contributor.authorFlores Montes, Manuel de Jesus
dc.contributor.authorda Costa, Rauquírio Marinho
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2022-07-26T13:25:11Z
dc.date.issued2022-09
dc.identifier.citationCosta, A.K.R. [et al.]. Effects of extreme climatic events on the hydrological parameters of the estuarine waters of the Amazon coast. "Estuaries and coasts", Setembre 2022, vol. 45, núm. 6, p. 1577-1533.
dc.identifier.issn1559-2723
dc.identifier.urihttp://hdl.handle.net/2117/371174
dc.descriptionThe final publication is available at Springer via http://dx.doi.org/10.1007/s12237-022-01056-y
dc.description.abstractOscillations in rainfall levels are one of the principal factors that determine seasonal shifts in physicochemical and hydrobiological variables, and exceptional climate events can have an enormous effect on the characteristics of small tropical estuaries. Given this, the present study investigated the responses of the physiochemical and hydrobiological variables of a small, shallow, and well-mixed Amazonian estuary with absence of any direct fluvial discharge to different climatic scenarios (typical conditions, and drier events). The study was based on 21 field campaigns conducted between April 2012 and April 2017. During rainy seasons of typical condition, when rainfall levels were higher and salinity lower than 7 (just after a weak La Niña), phytoplankton biomass was affected by increased turbidity (> 400 NTU) of the water, even when nitrogenous compounds were readily available (ammonium: 3.39 ± 1.71 µmol L−1, nitrite 0.90 ± 0.80 µmol L−1, and nitrate (3.91 ± 1.86 µmol L−1). In addition, the absence of any direct fluvial discharge appearance has contributed to the cumulation of phytoplankton biomass (chlorophyll-a > 20 mg m−3) into the estuary during the rainy season of the drier events and typical conditions, when turbidity was lower (< 200 NTU). Conversely, during the dry seasons of the drier events, when rainfall levels were lower, and extremes of salinity were recorded (> 38), phytoplankton biomass (chlorophyll-a < 10 mg m−3) was affected by the lower levels of nitrogenous compounds, even when phosphorous compounds were largely available. Overall, the present study has shown that extreme oscillations in rainfall levels cause abrupt shifts in the physicochemical parameters of the estuary, and affected the phytoplankton biomass, although high turbidity appeared to limit the buildup of this biomass. These effects are manifested immediately in the study area, given that the Taperaçu is a small estuary with a limited freshwater input, and it would seem reasonable to expect similar processes in other minor Amazonian estuaries when subjected to extreme fluctuations in rainfall levels.
dc.description.sponsorshipThis study was financed by CNPq, through a Universal project (483913/2012–0), and by CAPES (Ciências do Mar II—88882.158649/2014–01). The authors Pereira LCC (309491/2018–5) and Costa RM (311782/2017–5) received research grants from CNPq, and Costa AK received research grants from CAPES.
dc.format.extent-43 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Ports i costes
dc.subject.lcshEstuaries
dc.subject.otherClimatic events
dc.subject.otherHydrological variables
dc.subject.otherEstuary
dc.subject.otherAmazon coast
dc.titleEffects of extreme climatic events on the hydrological parameters of the estuarine waters of the Amazon coast
dc.typeArticle
dc.subject.lemacEstuaris
dc.contributor.groupUniversitat Politècnica de Catalunya. LIM/UPC - Laboratori d'Enginyeria Marítima
dc.identifier.doi10.1007/s12237-022-01056-y
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s12237-022-01056-y
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac32835859
dc.description.versionPostprint (author's final draft)
dc.date.lift2023-02-13
local.citation.authorCosta, A.K.R.; Cajueiro, L.; Jimenez, J.A.; Gomes, A.; Flores, M.; da Costa, R.M.
local.citation.publicationNameEstuaries and coasts
local.citation.volume45
local.citation.number6
local.citation.startingPage1577
local.citation.endingPage1533


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