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| 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 |
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| Mendonça,Luiz A. R.; Frischkorn,Horst; Santiago,Marlúcia F.; Camargo,Plínio B. de; Lima,José O. G. de; Mendes Filho,Josué. |
| A matéria orgânica (MO) encontrada no solo pode ser uma ferramenta auxiliar na identificação de uma vegetação remota. Na Floresta Nacional do Araripe e circunvizinhança, na Chapada do Araripe, realizou-se o presente estudo, em que as medidas de d13C e d15N da MO dos solos foram utilizadas para: (i) avaliar os valores atuais desses parâmetros; (ii) analisar a variabilidade natural do d13C no solo de diferentes formações florestais e (iii) indicar o declínio de florestas. Verificou-se que os solos das áreas hoje preservadas e cuja MO na superfície mostra d13C tipo C3, da vegetação atual, e uma mistura C3-C4 em profundidade, correspondem a ecossistemas antropizados no passado por uso agrícola; já os solos que mantiveram o d13C tipo C3 em todo o perfil se... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floresta Nacional do Araripe; Caracterização isotópica de solos; Ciclo fotossintético; Empobrecimento florestal. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000300012 |
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| Marques,Thiago S.; Tassoni-Filho,Maurício; Ferronato,Bruno O.; Guardia,Isabela; Verdade,Luciano M.; Camargo,Plínio B. de. |
| The isotopic composition ( δ13C and δ 15N) of muscle, carapace and claw was determined from six wild individuals of Phrynops geoffroanus (Schweigger, 1812) in order to verify the variation between those tissues. The mean values of δ13C e δ 15N were, respectively, -19.48 ± 0.81 (-20.8 - -18.64) and 7.23 ± 0.67 (6.49 - 8.3) for muscle, -16.52 ± 0.98 (-17.88 - -15.43) and 7.29 ± 0.54 (6.74 - 7.97) for carapace and -18.57 ± 0.97 (-19.97 - -17.26) and 4.36 ± 0.33 (3.93 - 4.79) for claw. We found a significant difference for the tissues evaluated for both δ13C and δ15N. Muscle and claw were statistically similar and more depleted in 13C than the carapace. Nonetheless, claw was more depleted in 15N than muscle and carapace tissues. These results are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Freshwater turtles; Geoffroy's side-necked-turtle; Metabolic processes; Stable isotope. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000300016 |
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| Marques,Thiago S.; Brito,Elizângela S.; Lara,Neliton R.F.; Beloto,Luciana M.; Valadão,Rafael M.; Camargo,Plínio B. de; Verdade,Luciano M.. |
| ABSTRACT Ecological niche is the multidimensional space comprising the resources used by an organism. Intraspecific variation in resource exploitation is common in reptile populations to maximize coexistence of individuals. The use of stable isotope analysis is an effective tool when there are variations in resource exploitation, since it can provide quantitative information about food consumption and habitat use. Mesoclemmys vanderhaegei (Bour, 1973) is a medium-sized turtle with a limited distribution in south central Brazil and Paraguay. In spite of that, little is known about its ecology. In this study we used stable isotope analysis to understand the intraspecific trophic niche variation in M. vanderhaegei at Serra das Araras Ecological Station, state... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Anthropic environment; Freshwater turtle; Isotopic niche; Sexual niche. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100501 |
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