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| Registros recuperados: 50 | |
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| Trevisan,André; Hepp,Luiz Ubiratan; Santos,Sandro. |
| This study investigated the influence of land use and occupation on the density and distribution of aeglids in the hydrographic basin of the Jacutinga river (northern state of Rio Grande do Sul, Brazil). Sampling was carried out during the summer and winter of 2004, at 12 sites distributed in river spring, agriculture, grazing, and urban areas. Animals were collected using a Surber sampler. An analysis of variance (ANOVA) was conducted to evaluate differences in the density of species in each land use and sampling period. Biological data were classified using cluster analysis (Euclidian distance; UPGMA). A total of 226 aeglids were captured, including 167 (78.89%) specimens of Aegla platensis Schmitt, 1942 and 59 (26.11%) specimens of A. singularis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aegla platensis; Aegla singularis; Bioindicators. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300006 |
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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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| MENDES, I. de C.; CUNHA, M. H. da; REIS JUNIOR, F. B. dos; FERNANDES, M. F.; CHAER, G. M.; MERCANTE, F. M.; ZILLI, J. E.. |
| Desde 1998, além dos estudos de fixação biológica do nitrogênio e micorriza, o grupo de microbiologia do solo da Embrapa Cerrados iniciou suas pesquisas em ecologia microbiana de solos de Cerrado conseguindo avanços significativos na caracterização da biomassa, atividade e diversidade microbiana dos solos desse bioma. Existia, até então, um desconhecimento sobre as propriedades microbiológicas dos solos de Cerrado sob vegetação nativa, sobre os impactos de sistemas agrícolas no funcionamento dos processos microbiológicos desses solos e de suas consequências na manutenção, melhoria ou perda da qualidade dos mesmos, após sua incorporação à agricultura. Durante esses 11 anos, o grupo sempre esteve presente proferindo palestras nos mais importantes congressos... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Qualidade do solo; Bioindicador; Tropical soil.; Bioindicators; Solo tropical; Soil quality.. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/661591 |
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| Alves, Tatiane dos Santos; UFMT; Campos, Lizia Lenza; UFMT; Elias Neto, Nicolau; UFMT; Matsuoka, Marcia; UFMT; Loureiro, Maria Fatima; UFMT. |
| O presente trabalho tem como objetivo avaliar a influência de diferentes sistemas de manejos, a população microbiana e sua atividade. Para tal, foram coletadas, em outubro de 2006 e março de 2007, amostras de solo na Fazenda Sereno no Município de Jaciara, Estado do Mato Grosso. Retirou-se amostras de solo na profundidade de 0-10 cm, com quatro repetições em cinco áreas com diferentes sistemas de manejos: integração lavoura-pecuária, lavoura de milho/soja, pastagens, vegetação nativa e vegetação nativa em recuperação. Para avaliar o carbono da biomassa microbiana (CBM) e a respiração microbiana (RM) foi utilizado o método do Clorofórmio Fumigação-Incubação (CFI). Já o qCO2 foi obtido pela relação entre a RM e o CBM. As médias foram comparadas pelo teste de... |
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Palavras-chave: 5.01.01.04-8 microrganismos do solo; Clorofórmio fumigação-incubação; Bioindicadores; Quociente metabólico; Integração lavoura-pecuária Microbiologia e Bioquímica do Solo soil microorganisms; Chloroform fumigation-incubation; Bioindicators; Metabolic quotient; Agriculture-livestock integration. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4841 |
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| Romão,Silvia; Donatti,Lucélia; Freitas,Matheus O.; Teixeira,Josiane; Kusma,Josiana. |
| This study aimed to assess the influence of the environment on fish health. Samples of Hoplias malabaricus and Geophagus brasiliensis, were collected from three different environments: area I was urban and areas II and III were rural. Analyses of red blood cell count, microhematocrit, hemoglobin concentration, white blood cell count and differential white cell count in blood smear were carried out. Mean corpuscular volume and mean corpuscular hemoglobin concentration were calculated. To analyze morphological alterations, gills, liver, kidney and gonads were submitted to routine histological processing. Individuals collected from area III had slightly lower blood indices than collected from area I . Severe kidney changes, degeneration of and crystallization... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Bioindicators; Biomarkers; Morphological alterations; Hematology. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400012 |
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| Londe,Vinícius; Silva,José Carlos da. |
| Despite their extreme importance for environmental balance, riparian forests have been severely disturbed over time. This study aimed to identify grass species and determine their distribution in a disturbed stretch of riparian forest along Pimentas creek, in the municipality of Matutina, which is in the state of Minas Gerais, Brazil. Among four plots established within the study area, we recorded Pennisetum purpureum Schumach., Urochloa mutica (Forssk.) T.Q. Nguyen, Urochloa decumbens (Stapf) R.D. Webster, Paspalum notatum Flüggé and Andropogon bicornis L. The most common species was Pennisetum purpureum, which occurred in all of the plots, more frequently in those that had been disturbed. The proportions of exotic and native grasses, as well as their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Riparian zone; Perturbation; Creek banks; Bioindicators. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000100010 |
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| MARQUES,M. M. G. S. M.; BARBOSA,F. A. R.; CALLISTO,M.. |
| Patterns of abundance and distribution of chironomid midges (Diptera, Chironomidae) in the middle Rio Doce basin were analysed. Human activities (mining, steel processing, and Eucalyptus spp. forestry) contribute to environmental degradation and low water quality in this watershed. Physical and chemical water traits (dissolved oxygen, pH, total alkalinity, electric conductivity, phosphorus and nitrogen concentrations) of 20 sampling points were used in a Principal Component Analysis (PCA) to establish the best and worst water quality. Sampling points recorded as the most polluted showed low genus richness of Chironomidae, less than five genera from the total 23, and dominance of the genus Chironomus, a bioindicator of environmental stress. Following... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chironomus; Bioindicators; Pollution. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400004 |
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| Essid, N.; Mahmoudi, E.; Beyrem, H.; Aissa, P.; Hedfi, A.. |
| The survey of sediment and hydrological parameters in the old harbor of Bizerte has revealed that this ecosystem knows a high anthropogenic pressure. In this area waters were characterized by weak contents in dissolved oxygen and sediments, rich in fine fraction, were loaded in hydrocarbons and in organic matter. The free-living nematodes, predominant taxa, responded to these disturbances by a significant decrease in their densities and their biomasses and had tendency, notably at the most isolated sites, to penetrate deeply to escape surface sediments highly loaded in hydrocarbons and in organic matter. |
| Tipo: Journal Contribution |
Palavras-chave: Hydrocarbons; Pollution effects; Pollution indicators; Meiobenthos; Harbours; Man-induced effects; Bioindicators; Hydrocarbons; Http://aims.fao.org/aos/agrovoc/c_3719. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/1115 |
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| Ortiz,Danielle Cristina; Santos,Marcielli Aparecida Borges dos; Oliveira Filho,Luís Carlos Iuñes de; Pompeo,Pâmela Niederauer; Niemeyer,Júlia Carina; Klauberg Filho,Osmar; Baretta,Carolina Riviera Duarte Maluche; Sampietro,Jean Alberto; Baretta,Dilmar. |
| Abstract: The aim of this study was to evaluate the influence of soil use on the morphological diversity of springtails and to verify the relationship of these organisms with soil physical, chemical, and microbiological properties. Samples were collected in the Southern region of Santa Catarina, involving three municipalities: Orleans, Lauro Müller, and Siderópolis, in the land use systems (LUS) of native forest (NF), Eucalyptus plantation (EP), pasture (PA), integrated crop-livestock (ICL), and no-tillage (NT). Soil samples to determine edaphic properties and pitfall traps were collected in winter and summer, in the same areas. The collected springtails were counted and morphotyped and the data were analyzed through abundance, Shannon-Wiener diversity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Collembola morphotypes; Bioindicators; Soil quality; Edaphic mesofauna. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300207 |
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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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| CORREIA,LÍVIA O.; SIQUEIRA JÚNIOR,SÉRGIO; CARNEIRO,PAULO L.S.; BEZERRA,MARCOS A.. |
| This paper presents a study on the viability of the use of tissues of the Leptodactylus ocellatus species (Anura Leptodactylidae) as a bioindicator of metal pollution. The study is based on the determination and correlation of the concentrations of manganese, chromium, zinc, nickel, copper and iron in sediments and tissues (skin, muscles and viscera) of the frog Leptodactylus ocellatus collected in the middle region of the Contas River in Bahia, Brazil. The highest levels of the metals studied were found in the viscera of this animal. In this tissue, a higher correlation of the concentration of these metals with those found in sediments was also observed. The concentrations of elements found in the skin and muscles of these amphibians have revealed no... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leptodactylus ocellatus; Bioindicators; Sediments; Metals; Contas River. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401549 |
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| Debenay, Jean-pierre; Tsakiridis, Erica; Soulard, René; Grossel, Hubert. |
| Port Joinville harbor is located on an island. Thus, it receives only a few freshwater inputs, contrary to most of the areas where the influence of pollution on foraminiferal assemblages has been studied. The pollution in the harbor mainly results from the boats, including cleaning, painting and outfall of oil and motor-fuel.A total of 59 sediment samples was collected at three sampling periods (November-December 1997, May 1998 and September 1998). These samplings were supplemented by the study of algal flora and macrobenthos and by the study of water circulation by means of six stations where water was collected every hour during a tide cycle. Contaminants were analyzed in the last series of 17 samples. Total assemblages were used for this study. This... |
| Tipo: Text |
Palavras-chave: France; Atlantic; Harbor; Pollution; Bioindicators; Foraminifera. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-764.pdf |
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| SILVA,LUZIMAR CAMPOS DA; AZEVEDO,ARISTÉA ALVES; SILVA,ELDO ANTÔNIO MONTEIRO DA; OLIVA,MARCO ANTONIO. |
| Os objetivos deste trabalho foram: caracterizar os efeitos do flúor em espécies arbóreas nativas, nos estádios de plântula e muda; identificar injúrias provocadas pelo flúor na estrutura da lâmina foliar da espécie mais sensível; fornecer subsídios para seleção de características a serem utilizadas na bioindicação e contribuir com informações sobre a resistência ou tolerância das plantas, visando ao reflorestamento de áreas impactadas pela chuva com flúor. As espécies analisadas foram Gallesia gorazema Moq. (Phytolaccaceae), Genipa americana L. (Rubiaceae), Joannesia princeps Vell. (Euphorbiaceae), Peltophorum dubium (Spreng.) Taub. (Leguminosae, Caesalpinioideae) e Spondias dulcis Forst. f. (Anacardiaceae). Plântulas e mudas dessas espécies, provenientes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fluoride; Bioindicators; Native plants; Symptomatology. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400004 |
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| Registros recuperados: 50 | |
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