Your browser doesn't support javascript.
loading
Past environmental changes: using sedimentary photosynthetic pigments to enhance subtropical reservoir management.
Cardoso-Silva, Sheila; Mizael, Juliana Soares Silva; Frascareli, Daniele; de Lima Ferreira, Paulo Alves; Figueira, Rubens César Lopes; Pompêo, Marcelo; Vicente, Eduardo; Moschini-Carlos, Viviane.
Afiliação
  • Cardoso-Silva S; Environmental Sciences Program, Institute of Science and Technology, State University of Sao Paulo (UNESP), Sorocaba, SP, Brazil. she.cardosos@gmail.com.
  • Mizael JSS; Environmental Sciences Program, Institute of Science and Technology, State University of Sao Paulo (UNESP), Sorocaba, SP, Brazil.
  • Frascareli D; Environmental Sciences Program, Institute of Science and Technology, State University of Sao Paulo (UNESP), Sorocaba, SP, Brazil.
  • de Lima Ferreira PA; Oceanographic Institute, University of São Paulo (USP), São Paulo, SP, Brazil.
  • Figueira RCL; Oceanographic Institute, University of São Paulo (USP), São Paulo, SP, Brazil.
  • Pompêo M; Ecology Department, Biosciences Institute, University of São Paulo (USP), São Paulo, SP, Brazil.
  • Vicente E; Microbiology and Ecology Department, Valencia University, Burjassot, Valencia, Spain.
  • Moschini-Carlos V; Environmental Sciences Program, Institute of Science and Technology, State University of Sao Paulo (UNESP), Sorocaba, SP, Brazil.
Environ Sci Pollut Res Int ; 31(15): 22994-23010, 2024 Mar.
Article em En | MEDLINE | ID: mdl-38413525
ABSTRACT
The historical impacts of eutrophication processes were investigated in six subtropical reservoirs (São Paulo, Brazil) using a paleolimnological approach. We questioned whether the levels of pigment indicators of algal biomass could provide information about trophic increase and whether carotenoid pigments could offer additional insights. The following proxies were employed organic matter, total phosphorus, total nitrogen, photosynthetic pigments (by high-performance liquid chromatography), sedimentation rates, and geochronology (by 210 Pb technique). Principal component analysis indicated a gradient of eutrophication. In eutrophic reservoirs (e.g., Rio Grande and Salto Grande), levels of lutein and zeaxanthin increased over time, suggesting growth of Chlorophyta and Cyanobacteria. These pigments were significantly associated with algal biomass, reflecting their participation in phytoplankton composition. In mesotrophic reservoirs, Broa and Itupararanga, increases and significative linear correlations (r > 0.70) between pigments and nutrients are mainly linked to agricultural and urban activities. In the oligotrophic reservoir Igaratá, lower pigment and nutrient levels reflected lesser human impact and good water quality. This study underscores eutrophication's complexity across subtropical reservoirs. Photosynthetic pigments associated with specific algal groups were informative, especially when correlated with nutrient data. The trophic increase, notably in the 1990s, may have been influenced by neoliberal policies. Integrated pigment and geochemical analysis offers a more precise understanding of eutrophication changes and their ties to human factors. Such research can aid environmental monitoring and sustainable policy development.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Qualidade da Água / Clorofila Limite: Humans País/Região como assunto: America do sul / Asia / Brasil Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Qualidade da Água / Clorofila Limite: Humans País/Região como assunto: America do sul / Asia / Brasil Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha