Consulta: creatorFacets:"Martinelli,Luiz A."
Registros recuperados: 2
Data/hora: 04/06/2024 08:13:37

Influence of land use changes on water chemistry in streams in the State of São Paulo, southeast Brazil
Provedor de dados: 42
Autores: Silva,Daniela M.L.; Camargo,Plínio B.; Mcdowell,William H.; Vieira,Ivan; Salomão,Marcos S.M.B.; Martinelli,Luiz A.
Streamwater is affected by several processes in the watershed including anthropogenic activities that result in changes in water quality as well as in the functioning of these stream ecosystems. Therefore, this work aims to evaluate the concentration of major ions (Ca2+, Mg2+, Na+, K+, NH4+, NO3-, NO2-, Cl-, SO4(2-), PO4(3-), HCO3-) in streams in the state of São Paulo (southeast Brazil). The sampling sites are located at undisturbed (ombrophilus dense forest, semideciduous forest and savanna - cerrado) and disturbed areas (pasture, urbanization and sugar cane crops). Streamwater chemistry varied according to land use change and, in general, was higher in disturbed sites. Streams located in undisturbed sites at Ribeira de Iguape/Alto Paranapanema watershed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrochemistry; Land use; Streams; Watersheds.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400007

Biomonitoring of Pb and Cd in two impacted watersheds in Southeast Brazil, using the freshwater mussel Anodontites trapesialis (Lamarck, 1819) (Bivalvia : Mycetopodidae) as a biological monitor
Provedor de dados: 52
Autores: Tomazelli,Andréa C.; Martinelli,Luiz A.; Avelar,Wagner E. P.; Camargo,Plínio B. de; Fostier,Anne-Helene; Ferraz,Epaminondas S. B.; Krug,Francisco J.; Santos Júnior,Dário.
Studies were carried out to investigate the contamination of Piracicaba and Mogi-Guaçu River basins (São Paulo State, Southeastern, Brazil) for heavy metals (Cd and Pb), using the limnic bivalve Anodontites trapesialis as a biological monitor. The results showed that the concentrations of Pb were higher than the control group in both basins, showing the bioavailability of this non-essential element in the basins. The concentrations were higher in the Mogi-Guaçu than in the Piracicaba basin, and in the slightly contaminated sites in both basins. There was no correlation between the degree of human impact and Cd and Pb concentrations, it was not possible to infer about concentrations of these heavy metals in the bivalves based only in a broad evaluation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Heavy metals; Mussels; Piracicaba; Mogi-Guaçu; Brazil.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400022