Paleoecology explains Holocene chemical changes in lakes of the Nhecolândia (Pantanal-Brazil)

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dc.contributor.authorGuerreiro, Renato Lada
dc.contributor.authorMcGlue, Michael M.
dc.contributor.authorStone, Jeffery R.
dc.contributor.authorBergier, Ivan
dc.contributor.authorParolin, Mauro
dc.contributor.authorda Silva Caminha, Silane A. F.
dc.contributor.authorWarren, Lucas V. [UNESP]
dc.contributor.authorAssine, Mario L. [UNESP]
dc.contributor.institutionInstituto Federal do Paraná – Campus Assis Chateaubriand
dc.contributor.institutionUniversity of Kentucky
dc.contributor.institutionIndiana State University
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionFaculdade Estadual de Ciências e Letras de Campo Mourão
dc.contributor.institutionUniversidade Federal de Mato Grosso
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T16:50:27Z
dc.date.available2018-12-11T16:50:27Z
dc.date.issued2018-06-01
dc.description.abstractThe objective of this research is to examine the history of lentic ecosystem salinity in the southern Pantanal wetlands (Brazil). The timing and controls on hydrochemical changes were inferred using sponge spicule and diatom paleoecology on a Holocene-aged sediment core from Nhecolândia, a lake district situated on a fossil lobe of the Taquari megafan. The oldest portion of the core contains Heterorotula fistula spicules, indicative of an ephemeral freshwater lake that existed until ~ 4.6 cal ka BP. Benthic diatoms of the genus Gomphonema and Eunotia appeared ~ 3.2 cal ka BP, indicating a shallow and dystrophic environment. A transition to a more permanent lake that hosted freshwater sponges (e.g., Corvoheteromeyenia spp.), and diatom assemblages (e.g., Cyclotella meneghiniana, Aulacoseira pantanalensis) endured until ~ 1.3 cal year BP; after this time, most sponges and planktic diatoms disappear from the sedimentary record. High abundances of Anomoeoneis sphaerophora and Craticula guaykuruorum in the latest Holocene reflect a transition to a hyperalkaline, saline lake environment. The results suggest that Nhecolândia’s saline lakes may evolve from freshwater precursors due to local (biochemical) and regional (geo-climatic) controls on water availability, which has implications for patterns of biodiversity and ecosystems services in Pantanal.en
dc.description.affiliationInstituto Federal do Paraná – Campus Assis Chateaubriand, 475 Avenida Cívica, Assis Chateaubriand
dc.description.affiliationDepartment of Earth and Environmental Sciences University of Kentucky, 121 Washington Ave
dc.description.affiliationDepartment of Earth and Environmental Systems Indiana State University, 600 Chestnut Street
dc.description.affiliationLaboratory of Biomass Conversion Embrapa Pantanal CPAP, P.O. 109
dc.description.affiliationLaboratório de Estudos Paleoambientais da Fecilcam (Lepafe) Faculdade Estadual de Ciências e Letras de Campo Mourão, 733 Avenida Comendador Norberto Marcondes, Campo Mourão
dc.description.affiliationLaboratório de Palinologia de Mato Grosso Faculdade de Geociências Universidade Federal de Mato Grosso, 2367 Avenida Fernando Correia da Costa
dc.description.affiliationInstituto de Geociências e Ciências Exatas Unesp - Universidade Estadual Paulista, Avenida 24-A, Bela Vista
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Unesp - Universidade Estadual Paulista, Avenida 24-A, Bela Vista
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipUniversity of Kentucky
dc.description.sponsorshipIdFAPESP: 2014/06889-2
dc.description.sponsorshipIdCNPq: 308563/2013-1
dc.description.sponsorshipIdCNPq: 476020/2013-1
dc.identifierhttp://dx.doi.org/10.1007/s10750-017-3429-3
dc.identifier.citationHydrobiologia, v. 815, n. 1, 2018.
dc.identifier.doi10.1007/s10750-017-3429-3
dc.identifier.file2-s2.0-85033498878.pdf
dc.identifier.issn1573-5117
dc.identifier.issn0018-8158
dc.identifier.scopus2-s2.0-85033498878
dc.identifier.urihttp://hdl.handle.net/11449/170360
dc.language.isoeng
dc.relation.ispartofHydrobiologia
dc.relation.ispartofsjr0,896
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDiatoms
dc.subjectPaleolimnology
dc.subjectPantanal wetlands
dc.subjectSaline lakes
dc.subjectSponge spicules
dc.titlePaleoecology explains Holocene chemical changes in lakes of the Nhecolândia (Pantanal-Brazil)en
dc.typeArtigo
unesp.author.orcid0000-0002-7993-8514[1]

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