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| Registros recuperados: 16 | |
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| Martins,Isabela; Sanches,Barbara; Kaufmann,Philip Robert; Hughes,Robert M.; Santos,Gilmar Bastos; Molozzi,Joseline; Callisto,Marcos. |
| Reservoirs are artificial ecosystems with multiple functions having direct and indirect benefits to humans; however, they also cause ecological changes and influence the composition and structure of aquatic biota. Our objectives were to: (1) assess the environmental condition of Nova Ponte Reservoir, Minas Gerais state, southeastern Brazil; and (2) determine how the aquatic biota respond to disturbances. A total of 40 sites in the littoral zone of the reservoir were sampled to characterize physical and chemical habitat, land use, and benthic macroinvertebrate and fish assemblages. The predominant type of land cover near the reservoir was natural vegetation. A total of 29 fish species and 39 macroinvertebrate taxa were collected, including eight alien... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reservoirs; Water quality; Bioindicators; Physical habitat; Environmental quality. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000100103 |
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| Azevêdo,Evaldo de Lira; Barbosa,José Etham de Lucena; Vidigal,Teofânia Heloisa Dutra Amorim; Marques,João Carlos; Callisto,Marcos; Molozzi,Joseline. |
| The introduction of exotic mollusk species has resulted in loss of biodiversity in semi-arid neotropical aquatic ecosystems. This study aims to relate the presence and density of Corbicula largillierti species to human disturbance, providing data for the conservation and management of aquatic ecosystems. Specimens were collected at Epitácio Pessoa reservoir in December 2011 and June 2012, presenting densities of 20.96 and 62.89 individuals per square meter, respectively. Anthropic disturbance metrics were calculated considering the presence, type and intensity of disturbance in littoral, riparian and flood zones. The occurrence of C. largillierti was mainly associated to the variables total phosphorus (261.05 ± 342.22 µg/L) and total nitrogen (440.79 ±... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corbiculidae; Anthropic disturbance; Environmental quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100107 |
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| Goulart,Michael; Callisto,Marcos. |
| The objectives of this study were to evaluate spatial and seasonal distribution, assemblage structure and substrate associations of mayfly nymphs in five lotic ecosystems in the headwaters of the Doce River and São Francisco River watersheds, Brazil. Samples were taken in 24 sampling stations during rainy and dry seasons in 1998. In total, 7,066 organisms were collected, belonging to 27 genera and 6 families of Ephemeroptera. The dominant taxa were Americabaetis, Paracloeodes, Leptohyphes and Hagenulus. During the rainy period, the São Francisco River watershed showed higher taxonomic richness, diversity and evenness, while in the dry period, the taxonomic richness was higher in Doce River watershed. No significant differences were found in the taxonomic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ephemeroptera; Habitat diversity; Substrate association; Conservation; River ecology. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000800015 |
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| Medeiros,Adriana O.; Missagia,Beatriz S.; Brandão,Luciana R.; Callisto,Marcos; Barbosa,Francisco A. R.; Rosa,Carlos A.. |
| Yeast communities were assessed in 14 rivers and four lakes from the Doce River basin in Brazil, during the rainy and dry seasons of the years 2000 and 2001. Water samples were collected at the subsurface in all sites. The following physical and chemical parameters were measured: temperature, dissolved oxygen, pH, electrical conductivity, total phosphorus, ortho-phosphate, ammonium, nitrate, nitrite and total nitrogen and the counts of faecal coliforms and heterotrophic bacteria were carried out to characterize the aquatic environmental sampled. The yeast counts were higher in aquatic environments with the highest counts of coliform and heterotrophic bacteria. These environments receive a high influx of domestic and industrial waste. A total of 317... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical freshwater; Yeast diversity and water quality. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400043 |
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| Molozzi,Joseline; França,Juliana S.; Araujo,Thiago L. A.; Viana,Tales H.; Hughes,Robert M.; Callisto,Marcos. |
| Foram avaliados os efeitos da estrutura física de habitats em comunidades de macroinvertebrados bentônicos em três reservatórios: Serra Azul (SA), Vargem das Flores (FV) e Ibirité (IB). Mensurações de variáveis físicas e químicas e comunidade bentônica foram realizadas em 30 estações de amostragem em cada reservatório. Em SA, foram coletados 12 táxons com predomínio de Melanoides tuberculatus Müller, 1774 (15,2%) e Chaoboridae (63,8%). Em VF foram coletados 11 táxons sendo M. tuberculatus (34,2%) e Oligochaeta (33,6%) os dominantes. Em IB foram coletados 7 táxons com domínio de M. tuberculatus (91,2%) e Chaoboridae (6,27%). Em Serra Azul foi observada influência significativa do sub-bosque arbustivo e do ângulo de inclinação do barranco. Nos reservatórios... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fauna bentônica; Integridade de habitats; Ecossistemas semi-lênticos; Bioindicadores bentônicos. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200006 |
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| Dutra,Silvia L.; Callisto,Marcos. |
| Macroinvertebrates as food were recorded for three anurans tadpoles: Hyla saxicola (Bokermann, 1964) (Hylidae), Scinax machadoi (Bokermann & Sazima, 1973) (Hylidae), and Bufo rubescens (Lutz, 1925) (Bufonidae). These species are commonly found in the mountain streams at Serra do Cipó National Park, Minas Gerais State, Brazil. Tadpoles were collected in pools of second-order reach in Mascates stream and third and fourth order reaches of Indaiá stream from March-October, 2003. Biometrical data were recorded before dissecting each individual and a feeding importance index was estimated. Eight taxa of chironomids and three taxa of mayfly exuviae were found in the guts, but no significantly differences were found between tadpole species (ANOVA, p >... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic food-webs; Aquatic insects; Conservation; Streams; Tadpole diet. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400018 |
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| Tupinambás,Taynan H.; Callisto,Marcos; Santos,Gilmar B.. |
| From December 2003 to September 2004, benthic macroinvertebrates (BM), fishes, water and sediment were collected quarterly at six stations in two streams of the upper São Francisco River basin, south-eastern Brazil. We evaluated the ecological conditions, habitat diversity, water quality, composition and structure of BM communities, as well as the food habits of the local fish fauna. By applying a protocol for rapid characterization of ecological conditions and habitat diversity, three of the sampled localities were classified as "pristine" while the others stations were considered "altered". A well oxygenated water with near neutral pH and low electric conductivity (< 0.01 mS/cm) and nutrient concentrations (< 0.08 mg/l total P and < 0.90 mg/l... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioindicators; Ecological conditions; Human activities; Stomach contents; Water quality. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400005 |
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| Callisto,Marcos; Goulart,Michael D.C.; Moreno,Pablo; Martins,Rogério P.. |
| Commensalism between Corydalus Latreille, 1802 (Megaloptera, Corydalidae) and Corynoneura Winnertz, 1846 (Diptera, Chironomidae, Orthocladiinae) larvae was recorded in Indaiá stream, at 1,380 m a.s.l. (Parque Nacional da Serra do Cipó, 19º-20ºS, 43º-44ºW) and in the headwaters of São Francisco river, at 1,300-1,700 m a.s.l. (Parque Nacional da Serra da Canastra, 20º00'-20º30'S, 46º15'-47º00'W), in Minas Gerais state, Brazil. Seventy eight Corydalus larvae (range 22-88 mm) were sampled: 61 in the Indaiá stream and 17 in other two streams. Twelve Corydalus larvae (22-79 mm) in the Indaiá stream and three out of 15 larvae in the headwaters of São Francisco river (38-50 mm) had Corynoneura, larvae and pupae on their gills (3rd to 6th) and a few larvae attached... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Headwater stream; Phoresy; Predator-prey relationship; São Francisco river. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200032 |
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| Registros recuperados: 16 | |
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