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| Bevilacqua,Maria Silvina; Marchese,Mercedes Rosa; Felix,Rodrigo Weber; Leal,João José Fonseca; Barros,Marcos Paulo Figueiredo de; Bozelli,Reinaldo Luiz; Esteves,Francisco de Assis. |
| Abstract: The aim of this study was to analyze aquatic oligochaete distribution in relation to water column physicochemical variables, structural environmental variation, and predominant substrates in the preserved Amazonian streams of the Saracá-Taquera National Forest (FLONA Saracá-Taquera), northwest Pará, Brazil. Oligochaetes are widely used as bioindicators for monitoring aquatic environments as they are very sensitive to pollution and environmental changes. Physicochemical and structural variables were measured from 100 stream segments in order to understand the distribution of oligochaetes in Amazonian streams. Biotic samples were collected using Surber samplers in three of the most predominant substrate types in each segment. PERMANOVA testing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic macroinvertebrates; Biomonitoring; Tropical streams; Substrates; Stream hydrology; Mining activities. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100202 |
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| Kiffer Jr.,Walace P.; Giuberti,Thaís Z.; Serpa,Karoline V.; Mendes,Flávio; Moretti,Marcelo S.. |
| ABSTRACT: We evaluated the growth of periphyton and colonization of sterilized cobbles by invertebrates in three coastal streams of the Atlantic Forest (Southeast Brazil) that differ in the conservation level of riparian zones. Because of differences in light availability and water temperature, we hypothesized the growth of periphytic algae would be higher in the most altered stream. Consequently, invertebrate assemblages would differ among streams. Cobbles with similar sizes were ashed and incubated for 7, 15, 30, 45 and 60 days in the studied streams. Despite periphyton growth was faster in the most altered stream, contents of chlorophyll-a did not differ among streams. A total of 954 individuals (98% insects) belonging to 36 taxa was found. Invertebrate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Periphytic biomass; Invertebrate assemblages; Exposed substrates; Anthropogenic changes; Tropical streams. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100214 |
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| Rolla,Ana Paula Pozzo Rios; Esteves,Katharina Eichbaum; Ávila-da-Silva,Antônio Olinto. |
| This study aimed to characterize the trophic structure of the fish assemblage in streams of the Serra Japi, an ecotonal area between the Atlantic Forest and inland forests of São Paulo State, Southeastern Brazil. Fish were collected with electrofishing equipment in 15 sites covering different regions, substrate types and riparian vegetation, distributed throughout the Caguaçú River, Caxambú, Piraí and Guapeva River micro-basins, during the rainy (January/February) and dry season (June) of 2007. The 589 specimens analyzed from 22 species, were assigned to different trophic groups, discriminated through a matrix of similarity, based on the food index (IAi). The results show the formation of seven groups with a predominance of insectivorous and omnivorous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical streams; Freshwater fish; Trophic ecology; Distribution. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100009 |
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