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Registros recuperados: 42
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The fish fauna of the Jacaré-Guaçu River basin, Upper Paraná River basin Biota Neotropica
Esguícero,André Luiz Henríques; Arcifa,Marlene Sofia.
This study aimed to evaluate the fish fauna composition and distribution in different environments, up- and downstream the Gavião Peixoto Dam, in the Jacaré-Guaçu River basin. Most of the sampled ichthyofauna is autochthonous, and the majority of the species belongs to the orders Characiformes and Siluriformes. The order Characiformes comprised most of the specimens caught, Astyanax altiparanae being the most abundant species. All the studied environments were characterized by the massive occurrence of accidental species and low similarity between their ichthyofauna. In general, a greater number of species and higher values of the diversity index were observed downstream of the dam. The fish diversity in the studied habitats was positively correlated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical fishes; Stream ecology; Communities' structure; Freshwater fishes; Environmental degradation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100010
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Management of the environmental restoration of degraded areas BABT
Araujo,Izabel Cristina Leinig; Dziedzic,Maurício; Maranho,Leila Teresinha.
The aim of this work was to study ecotechnology for the management of degraded areas originally covered by the Atlantic Rainforest and located at the coordinates 25º31'50''S, 9º09'30''W. The area included 12 islands, each consisting of six jute bags with 20 kg of substrate (cattle manure and soil transposed from forest fragments). In six of these bags, native plants and seeds were also included. Six additional islands were selected randomly in the vicinity as the control. The process of evaluation was monitored through the chemical and granulometric soil analysis and surveys of survival, biometrics, floristic and phytosociological vegetation. An improvement in soil properties was observed where the model was implemented, which could be attributed to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Restoration ecology; Environmental degradation; Soil management; Revegetation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200018
Registros recuperados: 42
Primeira ... 123 ... Última
 

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