Consulta: subjectFacets:"Bioindicators"
Registros recuperados: 50
Data/hora: 10/06/2024 00:32:53

Using Ants as bioindicators:  Multiscale Issues in Ant Community Ecology
Provedor de dados: 7
Autores: Andersen, Alan; Wildlife and Ecology, CSIRO Tropical Ecosystems Research Centre; Alan.Andersen@terc.csiro.au.
Ecological patterns and processes are characteristically scale dependent, and research   findings often cannot be translated easily from one scale to another. Conservation biology is challenged by a lack of congruence between the spatial scales of ecological research (typically involving small plots) and land management (typically involving whole landscapes). Here, I discuss spatial scaling issues as they relate to an understanding of ant communities and, consequently, their use as bioindicators in land management. Our perceptions of fundamental patterns and processes in ant communities depend on scale: taxa that are behaviorally dominant at one scale are not necessarily so at others, functional groups recognized at one scale are often inappropriate for...
Tipo: Peer-Reviewed Reports
Palavras-chave: Ants; Biodiversity surrogacy; Bioindicators; Community; Diversity patterns; Functional groups; Multiscale; Spatial scale.
Ano: 1997

Local Management Practices for Dealing with Change and Uncertainty: A Cross-scale Comparison of Cases in Sweden and Tanzania
Provedor de dados: 7
Autores: Belfrage, Kristina; Swedish University of Agricultural Sciences; Kristina.Belfrage@lbutv.slu.se.
We investigated and compared management practices for dealing with uncertainty in agroecosystem dynamics in two cases of smallholder farming in different parts of the world: northeast Tanzania and east-central Sweden. Qualitative research methods were applied to map farmers' practices related to agroecosystem management. The practices are clustered according to a framework of ecosystem services relevant for agricultural production and discussed using a theoretical model of ecosystem dynamics. Almost half of the identified practices were found to be similar in both cases, with similar approaches for adjusting to and dealing with local variability and disturbance. Practices that embraced the ecological roles of wild as well as domesticated flora and fauna...
Tipo: Peer-Reviewed Reports
Palavras-chave: Mbulu highlands; Roslagen; Sweden; Tanzania; Agroecosystem; Biodiversity; Bioindicators; Local ecological knowledge; Management practices; Resilience; Traditional ecological knowledge.
Ano: 2004

Seasonal dynamics of a drosophilid (Diptera) assemblage and its potencial as bioindicator in open environments
Provedor de dados: 76
Autores: Bizzo,Luís; Gottschalk,Marco S; Toni,Daniela C. De; Hofmann,Paulo R. P.
Drosophila Fallen, 1823 (Diptera, Drosophilidae) is for long a well-established model organism for genetics and evolutionary research. The ecology of these flies, however, has only recently been better studied. Recent papers show that Drosophila assemblies can be used as bioindicators of forested environment degradation. In this work the bioindicator potential of drosophilids was evaluated in a naturally opened environment, a coastal strand-forest (restinga). Data from nine consecutive seasonal collections revealed strong temporal fluctuation pattern of the majority of Drosophila species groups. Drosophila willistoni group was more abundant at autumns, whereas D. cardini and D. tripunctata groups were, respectively, expressive at winters and springs, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila; Seasonality; Bioindicators; Restinga; Brazil.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000300001

Bioindicadores para avaliação da qualidade dos solos tropicais: utopia ou realidade?
Provedor de dados: 14
Autores: 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

Factors determining the distribution of foraminiferal assemblages in Port Joinville Harbor (Ile d'Yeu, France): the influence of pollution
Provedor de dados: 5
Autores: 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

Impact of wastewater treatment plant discharges on macroalgae and macrofauna assemblages of the intertidal rocky shore in the southeastern Bay of Biscay
Provedor de dados: 5
Autores: Huguenin, L.; Lalanne, Y.; De Casamajor, Marie-noelle; Gorostiaga, J.-m.; Quintano, E.; Salerno, M.; Monperrus, M.
Rocky intertidal habitats are particularly vulnerable to anthropogenic pressures especially in areas with high urban concentrations such as southeastern Bay of Biscay. This research aims to establish an assessment of the potential impact of sewage discharges on intertidal rocky benthic assemblages on macroalgae and on macrofauna as required by the European Directives (Water Framework Directive -WFD and Marine Strategy Framework Directive -MSFD). The assemblages were sampled at five locations according to a control-impact design. A moderate detectable effect of discharges was highlighted on the assemblage structure by means of multivariate analyses but this was less evident using other biological and ecological metrics. Results would also suggest that...
Tipo: Text
Palavras-chave: Benthic communities; Bioindicators; Impacts; Pollution; Sewage; Marine strategy framework directive.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00494/60587/64070.pdf

The impact of easily oxidized material (EOM) on the meiobenthos: Foraminifera abnormalities in shrimp ponds of New Caledonia; implications for environment and paleoenvironment survey
Provedor de dados: 5
Autores: Debenay, J.p.; Della Patrona, Luc; Herbland, Alain; Goguenheim, H.
This study was carried out in shrimp ponds from New Caledonia, in order to determine the cause of the exceptional proportion of abnormal tests (FAI) (often &gt;50%, sometimes &gt;80%). FAI was positively correlated to the quantity of easily oxidized material (EOM) deposited on the bottom of the ponds and to the sediment oxygen demand, and negatively correlated to redox. These results suggest that a very high FAI is a potential indicator for great accumulations of native organic matter, leading to a high sediment oxygen demand. When studying ancient sediments in core samples, exceptional abundances of abnormal tests may indicate periods of high accumulation of EOM, and therefore of oxygen depletion. This finding should help in better management of...
Tipo: Text
Palavras-chave: SW Pacific; Bioindicators; Organic matter; Shrimp ponds; Deformations; Foraminifera.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6955.pdf

Imposex and butyltin concentrations in snails from the lagoon of Bizerta (Northern Tunisia)
Provedor de dados: 5
Autores: Lahbib, Youssef; Abidli, Sami; Chiffoleau, Jean-francois; Averty, Bernard; Trigui El Menif, Najoua.
Imposex and butyltin concentrations were assessed in Hexaplex trunculus, Conus mediterraneus, Cyclope neritea and Nassarius mutabilis from Menzel Jemil, and H. trunculus and Stramonita haemastoma from the Bizerta channel. All females of the five species exhibited the characteristic development of male sex organs (penis and/or vas deferens). In Menzel Jemil, H. trunculus and C. mediterraneus exhibit similar imposex levels and were most affected (VDS reading 3-4). The development of a bud penis or a vas deferens sequence behind the right ocular tentacle was reported in Cyclope neritea and N. mutabilis (VDS 1). The concentration of tributyltin (TBT) was similar for the four species. The monobutyltin (MBT) was only detected in C. mediterraneus while the...
Tipo: Text
Palavras-chave: Bioindicators; Gastropods; Organotins; Southern Mediterranean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12638/9569.pdf

Trophic organization and fish assemblage structure as disturbance indicators in headwater streams of lower Sorocaba River basin, São Paulo, Brazil
Provedor de dados: 83
Autores: Cruz,Bruna Botti; Teshima,Fernanda Ayumi; Cetra,Mauricio.
Studies that investigate the relationship patterns between environmental structure complexity and fish fauna provide crucial information to stream restoration efforts. In order to test the hypothesis that streams with more complex environmental structure sustain more diverse and functionally more complex fish communities we sampled fish fauna from Sorocaba River headwater stream reaches (SE - Brazil). Reaches represented two distinct treatments: (1) a simplified reach, characterized by unstable fine substrate, clay, deeper channel and higher water velocity and (2) structurally complex reaches, characterized by coarse substrate, with gravel, pebble, rock, stems and branches and leaves inside the channel, producing a diverse pattern of microhabitat,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Environmental heterogeneity; Functional group.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100171

Distribution quantitative de la meiofaune dans un milieu fortement anthropise  :  le vieux port de Bizerte (Tunisie)
Provedor de dados: 20
Autores: 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

Considérations sur le traitement du diagramme (Polecto-rhynchus mediterraneus, Guichenot 1850)
Provedor de dados: 20
Autores: Thiam, M.; Kalianov, V.
Tipo: Journal Contribution
Palavras-chave: T/S diagrams; Radiance distribution; Bioindicators; Fishery data.
Ano: 1988
URL: http://hdl.handle.net/1834/4684

Soil macrofauna under different land uses in the Colombian Amazon
Provedor de dados: 86
Autores: Suárez,Leonardo Rodríguez; Josa,Yuli Tatiana Paladines; Samboni,Erika Judith Astudillo; Cifuentes,Karla Dayana Lopez; Bautista,Ervin Humprey Durán; Salazar,Juan Carlos Suárez.
Abstract: The objective of this work was to evaluate the soil macrofauna and the bioindicator taxonomic groups associated with different land uses in the Colombian Amazon. Twelve agroforestry arrangements were studied and compared with to the native forest and pasture. For each land use, six monoliths were randomly selected and divided into four layers (litter, and 0-10, 10-20, and 20-30 cm soil depths). The variables considered in the analysis of land use effects were: individuals per square meter, order richness, Shannon’s diversity index, and Pielou’s evenness index. The greatest values for soil macrofauna density and diversity occurred in the forest, in contrast with the pasture. The principal component analysis distinguished land use according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agroforestry systems; Bioindicators; Richness; Soil macrofauna.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201383

Transgenic Bt maize does not affect the soil ant community
Provedor de dados: 86
Autores: Assis,Valéria Cristina Barbosa de; Chagas,Pedro Guedes; Marinho,Cidália Gabriela Santos; Fadini,Marcos Antônio Matiello; Delabie,Jacques Hubert Charles; Mendes,Simone Martins.
Abstract: The objective of this work was to survey soil ants in Bt and non-Bt maize (Zea mays) crops, and to compare their effect on the soil ant community. Nine pitfall traps, 10 m apart, were installed in a central area (900 m2) of each of the following treatments (2,500 m2): conventional maize; maize modified with the Cry1F, Cry1Ab, and Vip3A proteins; and a native vegetation area. Fortnightly collections were conducted during four periods (complete producing cycles) of the crop, from 2011 to 2013. The number of ant species varied from 25 in Bt maize (Vip 3A) to 58 in Bt maize (Cry 1F). The treatment with conventional maize showed the highest Shannon-Wiener diversity index (H’ = 2.60). Jaccard’s index showed that there is dissimilarity between the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Bioindicators; Formicidae; Myrmicinae; Nontarget arthropods; Soil biology.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200152

Root exudation of imazapyr by eucalypt, cultivated in soil
Provedor de dados: 87
Autores: Silva,C.M.M.; Ferreira,L.R.; Ferreira,F.A.; Miranda,G.V.
Imazapyr has been used to control stump sprouting in stand of Eucalyptus plantations, where herbicide is applied to the tree trunk before cutting. The herbicide is applied exclusively on the stump to be killed, but little is known about the final fate of the molecule. Imazapyr exudation via roots of eucalypt grown in soil as the substrate was evaluated under greenhouse conditions. Different herbicide doses (0.000, 0.375, 0.750, 1.125, 1.500, and 3.000 kg ha-1 a.i.) were applied on the aerial parts of 8-month-old Eucalyptus grandis clonal seedlings, cultivated in pots with 18.0 dm³ of soil. Forty days after this treatment, the eucalypt plants were cut and a lateral opening in the containers was made and the plants inclined 90º, with plants sensitive to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chopper; Eucalyptus grandis; Bioindicators; Interference; Exudates.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000100014

Edaphic Entomofauna Variation Depending on Glyphosate Application in Roundup Ready Soybean Crops
Provedor de dados: 87
Autores: PEREIRA,J.L.; ARAÚJO,T.A.; RODRIGUES-SILVA,N.; SILVA,A.A.; PICANÇO,M.C.
ABSTRACT: Currently, biomonitoring is a methodology used to verify the environmental impact of new technologies in the agricultural environment, highlighting edaphic entomofauna that is traditionally used as a bioindicator in this sort of research. Therefore, the objective of this study was to investigate the edaphic entomofauna variation depending on glyphosate application in Roundup Ready soybeans. The experiment was carried out in Coimbra, MG during the 2007/2008 and 2008/2009 cropping seasons. The experimental design was a randomized block design with five replications. The treatments were: non-transgenic soybean with mechanical weeding of weeds; transgenic soybean with mechanical weeding of weeds; transgenic soybean with one glyphosate application and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Bioindicators; Transgenic plants; Herbicide.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100307

Flúor em chuva simulada: sintomatologia e efeitos sobre a estrutura foliar e o crescimento de plantas arbóreas
Provedor de dados: 88
Autores: 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

Soil quality indicators in a rhodic kandiudult under different uses in northern Parana, Brazil
Provedor de dados: 90
Autores: Kuwano,Biana Harumi; Knob,Adriana; Fagotti,Dáfila Santos Lima; Melém Júnior,Nagib Jorge; Godoy,Leandro; Diehl,Raquel Cátia; Krawulski,Cristina Célia; Andrade Filho,Galdino; Zangaro Filho,Waldemar; Tavares-Filho,João; Nogueira,Marco Antonio.
Sustainable use of soil, maintaining or improving its quality, is one of the goals of diversification in farmlands. From this point of view, bioindicators associated with C, N and P cycling can be used in assessments of land-use effects on soil quality. The aim of this study was to investigate chemical, microbiological and biochemical properties of soil associated with C, N and P under different land uses in a farm property with diversified activity in northern Parana, Brazil. Seven areas under different land uses were assessed: fragment of native Atlantic Forest; growing of peach-palm (Bactrys gasipaes); sugarcane ratoon (Saccharum officinarum) recently harvested, under renewal; growing of coffee (Coffea arabica) intercropped with tree species; recent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Land use; Metabolic coefficient; Microbial biomass; Soil enzymes; Soil quality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100005

Morphological Diversity of Springtails in Land Use Systems
Provedor de dados: 90
Autores: Santos,Marcielli Aparecida Borges dos; Oliveira Filho,Luís Carlos Iuñes de; Pompeo,Pâmela Niederauer; Ortiz,Danielle Cristina; Mafra,Álvaro Luiz; Klauberg Filho,Osmar; Baretta,Dilmar.
ABSTRACT: Springtails (Collembola) are soil organisms with wide morphological diversity and are sensitive to alterations in the soil, regardless of whether they are human-caused or not. The aim of this study was to evaluate the influence of land use on the morphological diversity of springtails and verify their relationships with soil physical, chemical, and microbiological properties. Samples were collected in the eastern region of Santa Catarina, in three municipalities: Joinville, Blumenau, and Timbó. They included the following land use systems (LUSs): native forest (NF), Eucalyptus plantation (EP), pasture (PA), integrated crop-livestock (ICL), and no tillage (NT). Samples were collected to determine soil properties, and pitfall traps were set in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eco-morphological traits; Morphotypes; Bioindicators; Soil fauna.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100421

Soil Macrofauna as a Soil Quality Indicator in Native and replanted Araucaria angustifolia Forests
Provedor de dados: 90
Autores: Pereira,Jamil de Morais; Segat,Julia Corá; Baretta,Dilmar; Vasconcellos,Rafael Leandro de Figueiredo; Baretta,Carolina Riviera Duarte Maluche; Cardoso,Elke Jurandy Bran Nogueira.
ABSTRACT Studies on soil quality in Araucaria forests contribute to understanding changes in this ecosystem and serve as a tool in conserving its biodiversity. The aim of this study was to evaluate the potential of soil macrofauna in discriminating native and replanted Araucaria forests for selection of soil quality indicators. Native (NF) and replanted (RF) Araucaria angustifolia forests were evaluated in three regions of the state of São Paulo, representing three true replications. Fifteen soil samples were collected in each area for evaluation of the physical, chemical, and microbiological properties and the macrofauna through use of monolith excavation and the manual screening method [Tropical Soil Biology and Fertility (TSBF) method]. In addition, we...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Multivariate analysis; Biodiversity; Bioindicators.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100423

Microbial biomass and activity in litter during the initial development of pure and mixed plantations of Eucalyptus grandis and Acacia mangium
Provedor de dados: 90
Autores: Bini,Daniel; Figueiredo,Aline Fernandes; Silva,Mylenne Cacciolari Pinheiro da; Vasconcellos,Rafael Leandro de Figueiredo; Cardoso,Elke Jurandy Bran Nogueira.
Studies on microbial activity and biomass in forestry plantations often overlook the role of litter, typically focusing instead on soil nutrient contents to explain plant and microorganism development. However, since the litter is a significant source of recycled nutrients that affect nutrient dynamics in the soil, litter composition may be more strongly correlated with forest growth and development than soil nutrient contents. This study aimed to test this hypothesis by examining correlations between soil C, N, and P; litter C, N, P, lignin content, and polyphenol content; and microbial biomass and activity in pure and mixed second-rotation plantations of Eucalyptus grandis and Acacia mangium before and after senescent leaf drop. The numbers of cultivable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganism; Litterfall; Bioindicators; Forestry; Legumes; Basal respiration.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100008

Intra- and inter-annual variations in Chironomidae (Insecta: Diptera) communities in subtropical streams
Provedor de dados: 103
Autores: Nava,Diane; Restello,Rozane M.; Hepp,Luiz U.
The structure and composition of stream benthic communities are strongly influenced by spatial and temporal factors. This study evaluated the intra and inter-annual variations in Chironomidae communities in subtropical streams. The organisms were sampled from 10 small-order streams during the summer and winter of 2010-2012. The number of chironomid specimens sampled was 7,568, distributed in 49 genera. Chironomid abundance and richness varied intra and inter-annually and community composition varied intra-annually (2010 and 2011). Water temperature, total organic carbon, nitrogen, and rainfall were correlated with chironomid community composition. The intra-annual variation of the community was dependent on climatic variations (temperature and rainfall)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture impacts; Bioindicators; Macroinvertebrates; Rainfall.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000300207

Abundância e distribuição de Aeglidae (Crustacea: Anomura) em função do uso da terra na bacia hidrográfica do Rio Jacutinga, Rio Grande do Sul, Brasil
Provedor de dados: 103
Autores: 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

Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams
Provedor de dados: 103
Autores: Ávila,Milton P.; Carvalho,Rafaela Neves; Casatti,Lilian; Simião-Ferreira,Juliana; Morais,Lorrane Faria de; Teresa,Fabrício B.
ABSTRACT The development of effective monitoring tools depends on finding sensitive metrics that are capable of detecting the most important environmental impacts at a given region. We assessed if metrics derived from stream fish assemblages reflect physical habitat degradation and changes in land cover. We sampled the ichthyofauna and environmental characteristics of 16 stream sites of first and second order in the Upper Tocantins River basin. The streams were classified according to their environmental characteristics into reference (n = 5), intermediate (n = 4), and impacted (n = 7). A total of 4,079 individuals in five orders, 12 families, and 30 species were collected. Of the 20 metrics tested, eight were non-collinear and were tested for their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Brazilian savannah; Fish fauna; Multimetric index.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100303

Morphology and 18S rDNA gene sequence of Spirostomum minus and Spirostomum teres (Ciliophora: Heterotrichea) from Rio de Janeiro, Brazil
Provedor de dados: 103
Autores: Fernandes,Noemi M.; Silva Neto,Inácio D. da.
Species of Spirostomum Ehrenberg, 1838 are widely used as model organisms in ecological studies of environmental impacts and symbioses between ciliates and human pathogenic bacteria. However, the taxonomy of this genus is confused by the superficiality of the morphological descriptions of its included species, and the use of only a few characters for their differentiation. The present study provides details of total infraciliature, nuclear apparatus, morphometric data and 18S rDNA gene sequences of Spirostomum teres Claparède &amp;amp; Lachmann, 1858 and Spirostomum minus Roux, 1901, isolated from a sewage treatment plant and a freshwater lake in the city of Rio de Janeiro, Brazil, respectively. For the morphological descriptions of S. teres and S. minus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Ciliates; Cryptic species; Heterotrichs; Morphology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000100009

The agricultural impact of pesticides on Physalaemus cuvieri tadpoles (Amphibia: Anura) ascertained by comet assay
Provedor de dados: 103
Autores: Gonçalves,Macks W.; Gambale,Priscilla G.; Godoy,Fernanda R.; Alves,Alessandro Arruda; Rezende,Pedro H. de Almeida; Cruz,Aparecido D. da; Maciel,Natan M.; Nomura,Fausto; Bastos,Rogério P.; Marco-Jr,Paulo de; Silva,Daniela de M.
ABSTRACT Amphibians inhabiting agricultural areas are constantly exposed to large amounts of chemicals, which reach the aquatic environment during the rainy season through runoff, drainage, and leaching. We performed a comet assay on the erythrocytes of tadpoles found in the surroundings of agricultural fields (soybean and corn crops), where there is an intense release of several kinds of pesticides in different quantities. We aimed to detect differences in the genotoxic parameters between populations collected from soybeans and cornfields, and between them and tadpoles sampled from non-agricultural areas (control group). Tadpoles collected from ponds located at soybean fields had significantly more DNA damage, followed by tadpoles collected from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibians; Bioindicators; Exposure; Genotoxicity; Pesticides.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100316

Recording of ocean-climate changes during the last 2,000 years in a hypoxic marine environment off northern Chile (23°S)
Provedor de dados: 97
Autores: ORTLIEB,LUC; ESCRIBANO,RUBEN; FOLLEGATI,RENZO; ZUÑIGA,OSCAR; KONG,ISMAEL; RODRIGUEZ,LUIS; VALDES,JORGE; GUZMAN,NURY; IRATCHET,PAOLA.
Atmosphere-ocean interactions are particularly strong along the Chile-Peru coast and largely account for the extreme aridity of the Atacama Desert. Near the center of the driest part of this coastal desert, we found that the embayment Bahía Mejillones constitutes an unusually favorable setting for the formation and subsequent preservation of a sedimentary record of the successive oceanographic conditions of the last few thousand years. This work deals with relative abundance of various bio-indicators, including fish scales, foraminifers and phytoplankton, with a centimetre-scale resolution, in several gravity cores taken from 80 to 120 m depth, in a low-oxygen environment. We use this information to document ocean-climate changes at decadal to centennial...
Tipo: Journal article
Palavras-chave: Bioindicators; Paleoceanography; Paleoclimatology; Northern-Chile; Low-oxygen sediments.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000200002

Indicators of soil quality in the implantation of no-till system with winter crops
Provedor de dados: 124
Autores: Nogueira,Marco Antonio; Telles,Tiago Santos; Fagotti,Dáfila dos Santos Lima; Brito,Osmar Rodrigues; Prete,Cássio Egídio Cavenaghi; Guimarães,Maria de Fátima.
We assessed the effect of different winter crops on indicators of soil quality related to C and N cycling and C fractions in a Rhodic Kandiudult under no-till system at implantation, during two growing seasons, in Londrina PR Brazil. The experimental design was randomized blocks with split-plot in time arrangement, with four replications. The parcels were the winter crops: multicropping of cover crops with black oat (Avena strigosa), hairy vetch (Vicia villosa) and fodder radish (Raphanus sativus); sunflower (Heliantus annuus) intercropped with Urochloa ruziziensis; corn (Zea mays) intercropped with Urochloa; and corn; fodder radish; or wheat (Triticum aestivum) as sole crops. The subplots were the years: 2008 and 2009. Determinations consisted of total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Organic Mater; Carbon; Microbial biomass.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500014

Earthworm populations sampled using collection methods in atlantic forests with Araucaria angustifolia
Provedor de dados: 63
Autores: Baretta,Dilmar; Brown,George Gardner; James,Samuel Wooster; Cardoso,Elke Jurandy Bran Nogueira.
Araucaria angustifolia, also known as the Paraná Pine is an endangered tree species in Brazil and little is known of the diversity of soil invertebrates inhabiting these forests. Therefore, the present study was set up to evaluate the biomass and diversity of earthworms in natural and reforested Araucaria plots, impacted or not by fire, and to identify the most efficient earthworm collection method. Four study areas included: native forest with Araucaria (NF); Araucaria reforestation (R); Araucaria reforestation submitted to an accidental fire (RF); and native grass pasture with native Araucaria and submitted to an intense accidental fire (NPF). Five soil samples containing the earthworm community were taken in a 0.3 ha area in each of the forest sites,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oligochaeta; Biodiversity; Burning; Native and exotic species; Bioindicators.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400009

Trap and soil monolith sampled edaphic spiders (arachnida: araneae) in Araucaria angustifolia forest
Provedor de dados: 63
Autores: Baretta,Dilmar; Brescovit,Antonio Domingos; Knysak,Irene; Cardoso,Elke Jurandy Bran Nogueira.
Forests with Araucaria angustifolia (Bert.) O. Kuntze trees are endangered in Brazil, and information on the diversity of soil spider families associated to these environments is practically inexistent. The present study was set up to evaluate the abundance and diversity of soil spider families in natural and reforested Araucaria forests, impacted or not by fire, and to identify the most efficient method to collect these organisms. The study was conducted in four areas: native forest with predominance of Araucaria (NF); Araucaria reforestation (R); Araucaria reforestation submitted to an accidental fire (RF); and native grass pasture with native Araucaria and submitted to an intense accidental fire (NPF). Considering both sampling methods (Monolith and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Rainforest; Spider fauna; Spider diversity; Bioindicators.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400008

Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil
Provedor de dados: 104
Autores: 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 (&lt; 0.01 mS/cm) and nutrient concentrations (&lt; 0.08 mg/l total P and &lt; 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

Evidence of mutagenic and lethal effects of herbicides on Amazonian frogs
Provedor de dados: 36
Autores: FERRANTE,Lucas; FEARNSIDE,Philip M.
ABSTRACT Amphibians are excellent bioindicators because they are sensitive to chemical pollution and can indicate ecosystem changes due to the presence of or exposure to chemical compounds. Here we report evidence of the impact of herbicides, including glyphosate, on amphibians in a locality in the central Brazilian Amazon and compare it with data from other biomes in Brazil. We observed malformations in three species of Leptodactylus and local extinctions of Scinax ruber and Rhinella marina from reproductive sites close to an area where herbicides had been applied. The observations in the Amazon are similar to reports from Brazil’s Atlantic forest on morphological anomalies and mortality in amphibians exposed to herbicides. We warn of the threat of...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Agrochemicals; Amazon Forest; Anurans; Bioindicators; Ecotoxicology; Environmental impact.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400363

LEAF-CUTTING ANTS Acromyrmex niger SMITH, 1858(HYMENOPTERA; FORMICIDAE) USED AS BIOINDICATORS OF AGROTOXICS RESIDUES
Provedor de dados: 37
Autores: BELIZÁRIO CANTAGALLI,LIRIANA; ALVES LOPES,DENISE; PAZ BARATEIRO STUCHI,ANA LÚCIA; COLLA RUVOLO-TAKASUSUKI,MARIA CLAUDIA.
Despite the condition of leaf-cutting ant pests in agroecosystems, it is undeniable the benefits they can bring in certain situations or environments. The leaf-cutting ants of the genus Acromyrmex attack mainly leaves of vegetables and fruit trees exposing not only to the agrochemicals used for their control as well as to those used for the control of other pests. Due to the bioindicator potential of environmental quality of the ants and their frequent exposure to agrochemicals such as organophosphates, neonicotinoids and growth regulators insecticide used for pest control, it is necessary to study the sublethal effects that these pesticides may cause. The electrophoresis technique was used to study the activity of esterase isozymes involved in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acromyrmex Niger; Esterases; Bioindicators.
Ano: 2014
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2014000200011

Mosses as indicators of atmospheric metal deposition in an industrial area of southern Brazil
Provedor de dados: 39
Autores: Mazzoni,Aline Correa; Lanzer,Rosane; Bordin,Juçara; Schäfer,Alois; Wasum,Ronaldo.
Caxias do Sul hosts the second largest metal-mechanic pole in Brazil, which increases the risk of atmospheric contamination. With the aim of identifying species that might be useful as indicators of atmospheric deposition of metals, 15 species of mosses from an urban and a rural setting were analyzed and compared with specimens deposited at the Herbarium of the Universidade de Caxias do Sul. Metal concentrations (Zn, Ni, Cd, Cr, Cu and Pb) were determined using Atomic Absorption Spectrometry (AAS). The Mann-Whitney test indicated concentrations of Zn, Cu, Pb and Cr that were significantly different between the urban and rural areas. Additionally, Concentrations of Zn, Cd, Cu and Pb were significantly higher in recently collected samples. The species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atmospheric pollution; Bioindicators; Bryophyta; Heavy metals; Rio Grande do Sul.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000300005

Characterization of Poaceae (grass) species as indicators of the level of degradation in a stretch of riparian forest in Matutina, Brazil
Provedor de dados: 39
Autores: 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

Biomassa e atividade microbiana de solo sob vegetação nativa e diferentes sistemas de manejos - doi: 10.4025/actasciagron.v33i2.4841
Provedor de dados: 1
Autores: 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...
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

Índices bióticos para avaliação da qualidade ambiental em trechos do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil - doi: 10.4025/actascibiolsci.v33i3.1478
Provedor de dados: 3
Autores: Silva, Fábio Henrique da; Programa de Pós-Graduação em Meio Ambiente e Desenvolvimento Regional, Universidade para o Desenvolvimento  do Estado e da Região do Pantanal, Campo Grande, MS; Favero, Silvio; Programa de Pós-Graduação em Meio Ambiente e Desenvolvimento Regional, Universidade para o Desenvolvimento  do Estado e da Região do Pantanal, Campo Grande, MS; Sabino, José; Programa de Pós-Graduação em Meio Ambiente e Desenvolvimento Regional, Universidade para o Desenvolvimento  do Estado e da Região do Pantanal, Campo Grande, MS; Garnés, Silvio Jacks dos Anjos; Programa de Pós-Graduação em Meio Ambiente e Desenvolvimento Regional, Universidade para o Desenvolvimento  do Estado e da Região do Pantanal, Campo Grande, MS.
Este trabalho teve como objetivo pesquisar a estrutura da comunidade de insetos aquáticos, utilizando esta comunidade como indicadora da qualidade ambiental de um trecho do rio Correntoso, Pantanal do Negro, Mato Grosso do Sul, Brasil. Foram realizadas seis campanhas de coleta em diferentes períodos sazonais: vazante, seca e cheia. Os organismos foram coletados utilizando rede D com malha de 300 &amp;micro;m e esforço amostral de cinco lances de rede nas raízes dos bancos de macrófitas. Foram comparados três ambientes (aberto, intermediário e fechado), por junção dos dados obtidos de seis sítios de coleta. Foi analisada a riqueza, abundância absoluta e relativa das famílias de insetos amostrados e a avaliação da qualidade da água usando o índice BMWP,...
Palavras-chave: Ecologia; Limnologia entomofauna aquática; Bioindicadores; Planície de inundação 2.05.00.00-9 aquatic entomofauna; Bioindicators; Floodplain.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1478

Parasitic communities of Hoplosternum littorale (Hancock, 1828) as indicators of environmental impact
Provedor de dados: 42
Autores: DIAS,KARINA G.A; ALVES,CARLOS A.; SILVA,REINALDO J. DA; ABDALLAH,VANESSA D.; AZEVEDO,RODNEY K. DE.
ABSTRACT The parasites are indicative of several biological aspects of their hosts, including their diet, migration, recruitment and phylogeny, but they can also be direct indicators of the environmental quality. Hoplosternum littorale is a fish that has a high commercial value in some South American countries. The fishes were collected from January to July 2012, in two locations of the Peixe River in the municipality of Anhembi, State of São Paulo, Brazil, which had different environmental and limnological characteristics (river mouth and Lagoa Cabeça de Boi). An amount of 30 fish specimens were captured in each location for the analysis of their parasitic fauna. Nine species of metazoan parasites were collected. Both Brillouin`s diversity index and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Callichthyidae; Parasites; Peixe River; São Paulo.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502317

The holoplankton of the Santa Catarina coast, southern Brazil
Provedor de dados: 42
Autores: Resgalla Jr,Charrid.
This paper presents information from different sampling surveys carried out along the Santa Catarina coast in order to outline the biogeographical characteristics of the zooplankton in this region and identify species or groups of species with potential use as bioindicators. Based on a checklist of species of the zooplankton community in the state, it was observed that, in the warmer months of the year, the fauna is similar to that of the states of Paraná and São Paulo (e.g. Creseis virgula f. virgula, Penilia avirostris; Acartia lilljeborgi and Oithona oswaldocruzi), while in the colder months there are coastal representatives of the fauna of Rio Grande do Sul (e.g. Acartia tonsa). However, the zooplankton consists predominantly of warm water species for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Checklist; Coastal species; Water mass; Coastal environments; Biogeography.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200017

Evaluation of the use of Leptodactylus ocellatus (Anura: Leptodactylidae) frog tissues as bioindicator of metal contamination in Contas River, Northeastern Brazil
Provedor de dados: 42
Autores: 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

Diversity of springtails (Collembola) in agricultural and forest systems in Southern Santa Catarina
Provedor de dados: 49
Autores: 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

Ecological assessment of a southeastern Brazil reservoir
Provedor de dados: 49
Autores: 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

Influence of environmental quality of the tributaries of the Monjolinho River on the relative condition factor (Kn) of the local ichthyofauna
Provedor de dados: 49
Autores: Barrilli,Germano Henrique Costa; Rocha,Odete; Negreiros,Natalia Felix; Verani,José Roberto.
The relative condition factors (Kn) of the fishes Astyanax paranae, Phalloceros harpagos and Poecilia reticulata were used as a means of assessing the influence of environmental conditions on the well-being of sub - populations of these species, with the eventual aim of using them as bioindicators of disturbance in tributary streams of the Monjolinho River, in São Carlos - SP. The power-law curve generated by the length-weight relationship indicated a positive allometric growth for the three species studied. Overall, the canonical correspondence analysis (CCA) positively correlated average Kn of A. paranae with well oxygenated and oligotrophic environments, typical of conserved areas or near the natural state. For the average value of Kn obtained for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Condition factor; Length-weight relationship; Degradation; Bioindicators.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000100104

Oligochaeta (Annelida: Clitellata) in the Juruena River, MT, Brazil: species indicators of substrate types
Provedor de dados: 49
Autores: Gorni,Guilherme Rossi; Sanches,Nathalie Aparecida de Oliveira; Colombo-Corbi,Vanessa; Corbi,Juliano José.
Abstract: Oligochaeta assemblages are important components in freshwater environments, where their abundance and composition may indicate aspects related to water quality and sediment. The lack of information about these communities in Brazilian aquatic environments, as well as the application of native species as bioindicators of lotic environmental, stimulated the conception of this paper. Thus, the aim was to study the community of aquatic Oligochaeta in selected stretches of the Juruena River (MT), thereby generating grounds for future environmental monitoring action in lotic ecosystems. For this purpose, samples were analyzed at bimonthly intervals during the period from January to November 2009, in stretches of the Juruena River (Amazon River Basin)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater oligochaetes; Bioindicators; Lotic environments; Freshwater environments.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400206

Soil macrofauna in organic and conventional coffee plantations in Brazil
Provedor de dados: 49
Autores: Santos,Janaina Biral dos; Ramos,Alessandro Coutinho; Azevedo Júnior,Romildo; Oliveira Filho,Luís Carlos Iuñes de; Baretta,Dilmar; Cardoso,Elke Jurandy Bran Nogueira.
Abstract: Brazil has always been one of the most important coffee producing countries. Lately, there has equally been a renewed interest in alternative coffee production systems. The state of Espírito Santo is the second greatest coffee producer in Brazil; so, we used local coffee plantations to evaluate the relations between soil macrofauna and chemical and microbiological soil properties to identify which of these properties discriminate more effectively between the organic management system (OS) and the conventional management system (CS) of coffee plantations. For each of these two cultivation systems we chose three coffee farms who employed both cultivation systems and picked out the most similar fields from each property. At each site, first we...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Soil biology; Soil ecology; Soil fauna; Climate.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200209

Bioluminescent Coleoptera of Biological Station of Boracéia (Salesópolis, SP, Brazil): diversity, bioluminescence and habitat distribution
Provedor de dados: 49
Autores: Viviani,Vadim Ravara; Santos,Raphael Machado dos.
Brazil hosts the richest biodiversity of bioluminescent beetles in the world. Several species are found in the Atlantic rain forest, one of the richest and most threatened tropical forests in the world. We have catalogued the biodiversity of bioluminescent species mainly of Elateroidea superfamily occurring in one of the last largest and most preserved remnants of Atlantic rain forest, located at the Biological Station of Boracéia of São Paulo University (Salesopolis, SP, Brazil). This site accounted with the largest diversity ever found for a single place in São Paulo State, with 39 species: Lampyridae (30), Phengodidae (5), Elateridae (3) and Staphylinidae (1). This fauna has unique species that were not found in any other places of Atlantic forest in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lampyridae; Phengodidae; Elateridae; Staphylinidae; Bioluminescence; Fireflies; Bioindicators.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300001

Bioindicators in radiation protection
Provedor de dados: 52
Autores: Amaral,Ademir; Fernandes,Thiago Salazar; Cavalcanti,Mariana Brayner.
Biodosimetry is the evaluation of absorbed dose using bioindicators. Among chromosomal aberrations, scoring of dicentrics from peripheral human blood has been used as gold standard for biodosimetry, although in case of large scale incidents its use presents some drawbacks. Advances in technology have led to new investigations allowing or permitting the use of new methods which not only improve this "classical" biodosimetry but permits the design of other bioindicators making possible faster analyses, particularly in events where many persons may have been exposed. This report presents an overview of some recent studies developed by the "Grupo de Estudos em Radioproteção e Radioecologia - GERAR", Nuclear Energy Department of UFPE - Brazil, involving...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodosimetry; Physical Dosimetry; Radioprotection; Bioindicators; Protein expression.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700015

Blood parameter analysis and morphological alterations as biomarkers on the health of Hoplias malabaricus and Geophagus brasiliensis
Provedor de dados: 52
Autores: 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

Habitat diversity and benthic functional trophic groups at Serra do Cipó, Southeast Brazil
Provedor de dados: 57
Autores: CALLISTO,M.; MORENO,P.; BARBOSA,F. A. R.
The assessment of the diversity of habitats and the characterisation of the functional trophic groups of benthic macroinvertebrate communities of some rivers of Serra do Cipó (MG) were the main objectives of this study. The available trophic resources and the types of substrata were characterised along with the structure and composition of their using functional trophic groups. Serra do Cipó is a watershed divisor of the São Francisco and Doce River basins, including a series of streams and rivers, of good water quality and well preserved ecological characteristics. Samples were collected in Cipó, Peixe and Preto do Itambé rivers, besides the Indaiá and Capão da Mata streams at 26 sampling stations, during the rainy (February) and dry (October) seasons of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benthic macroinvertebrates; Functional trophic groups; Bioindicators; River ecology; Habitat diversity.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200008

Distribution and abundance of Chironomidae (Diptera, Insecta) in an impacted watershed in South-east Brazil
Provedor de dados: 57
Autores: 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

Soil macrofauna in a Cerrado/Caatinga ecotone under different crops in Southwestern Piauí State, Brazil
Provedor de dados: 65
Autores: Santos,Djavan Pinheiro; Schossler,Thiago Rodrigo; Santos,Isis Lima dos; Melo,Nathália Batista; Santos,Glenio Guimarães.
ABSTRACT: The aim of this study was to characterize the soil macrofauna under different crop systems and compare them to the macrofauna under the native vegetation of a Cerrado/Caatinga ecotone in southwestern Piauí State, Brazil. The areas studied included areas under sweetsop cultivation (Annona squamosa L.), andropogon grass with three years of use, andropogon grass with six years of use, pivot-irrigated corn, Napier grass, and native vegetation. In each area, soil layers of 0-0.1, 0.1-0.2, and 0.2-0.3m, including the surface litter, were evaluated following the Tropical Soil Biology and Fertility Program (TSBF) recommendations. The soil macrofauna from the different land-use systems were identified to the family level, and the mean density of each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Napier grass; Irrigated crop; Soil invertebrates; Soil quality.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000404