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| Registros recuperados: 32 | |
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| Bolico, Cristiane Ferras; Oliveira, Eduardo Alves; Gantes, Marcel Lucas; Dumont, Luiz Felipe Cestari; Carrasco, Daiane Silveira; D´Incao, Fernando. |
| O trabalho objetiva inventariar a mirmecofauna de duas marismas distintas e estimar a diversidade, similaridade, bem como relacionar a temperatura, umidade relativa do ar e a pluviosidade aos padrões de flutuação de abundância desses insetos. Além disso, foram reconhecidas as espécies que atuam como indicadores ambientais. O estudo foi realizado em duas marismas localizadas no Estuário da Laguna Lagoa dos Patos, Ilha da Torotama e Molhe Oeste da Barra. Foram capturados 853 formicídeos, distribuídos em 19 gêneros. As duas marismas apresentaram índices de diversidade e abundância semelhantes, Ds = 0,958 e I = 0,042 na Ilha da Torotama e Ds = 0,8889 e I = 0,111 no Molhe Oeste da Barra. As flutuações dos grupos de formicídeos coincidiram em ambas as áreas,... |
| Tipo: Article |
Palavras-chave: Bioindicador; Ecossistema Costeiro; Formigas; Insetos; Ants; Malaise; Bioindicator; Coastal Ecosystem; Insects. |
| Ano: 2012 |
URL: http://hdl.handle.net/2315/246 |
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| Casas, Stellio. |
| Monitoring coastal contamination of trace metals using bivalve molluscs as quantitative bioindicators is widely used in many international monitoring programs. The bioaccumulation of metal within an organism results from the interaction between physiological (growth, loss of weight, absorption, accumulation), chemical (metal concentration, speciation, bioavailability) and environmental factors (temperature, SPM, chlorophyll). By utilizing the parameters above in this study, it appears that modeling metal dynamics in marine mussels is a reliable tool. The model allows understanding the bioaccumulation process which results from the interactions between biological, chemical and environmental factors. One of the objective of this study was to couple a... |
| Tipo: Text |
Palavras-chave: Biomonitoring; Dynamic Energy Budget; Model; Trace metals; Bioaccumulation; Mytilus galloprovincialis; Mussel; Bioindicator; Surveillance; Budget énergétique dynamique; Modèle; Métaux traces; Bioaccumulation; Mytilus galloprovincialis; Moule; Bioindicateur. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/these-356.pdf |
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| Nakhle, Khaled; Cossa, Daniel; Khalaf, Ghaby; Beliaeff, Benoit. |
| The mussel, Brachidontes variabilis, and the limpet, Patella sp., were used as indicators to monitor cadmium, lead and mercury concentrations along the Lebanese coast. Studies were carried out in order to define the best strategy for assessing and minimizing the effects of size and physiological condition on the metal contents of the molluscs, and corrective models were constructed. Metal concentrations in surface water were measured to estimate bioconcentration factors (BCFs). The BCFs varied from 8.3 x 10(3) to 3.4 x 10(4), from 7.5 x 10(3) to 8.0 X 10(3) and from 3.0 x 10(4) to 3.2 x 10(4), for Cd, Pb and Hg, respectively. For limpets, BCFs varied from 1.7 x 10(4) to 7.4 x 10(4) for Cd, from 2.5 x 10(3) to 6 x 103 for Pb and remained fairly constant at... |
| Tipo: Text |
Palavras-chave: Lebanon; Mediterranean Sea; Bioconcentration factors; Patella sp; Brachidontes variabilis; Bioindicator; Trace metal. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1344.pdf |
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| Simião-Ferreira,Juliana; DeMarco Jr,Paulo; Mazão,Gustavo R; Carvalho,Adriana R. |
| In this study we determined the taxonomic diversity of larval Chironomidae upstream and downstream to discharges of the sewage treatment plant (STP) from Agro-industrial District of Anápolis, State of Goiás, Brazil. Additionally, we evaluated the use of the lognormal distribution as a measure of biotic integrity of this system. The Chironomidae communities were sampled in three sites, upstream and downstream of the discharge of the sewage treatment plant (STP). We fitted the truncate lognormal distribution based on a nonlinear regression of the datasets using least squares as loss function in an iterative quasi-Newton procedure. The total of 21,498 individuals were sampled, from 24 Chironomidae genera, Chironomus, Polypedilum, Rheotanytarsus e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment disturbance; Lognormal model; Bioindicator. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000400004 |
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| Nemésio,André; Silveira,Fernando A.. |
| Male orchid bees were sampled with chemical baits monthly from July 1999 to April 2000 at six sites situated at different distances from the forest edge (0 to 4,000 m) at Parque Estadual do Rio Doce, the largest remnant of Atlantic Forest in the state of Minas Gerais, southeastern Brazil. The main goal of this study was to assess the abundance, richness, and the community structure of the orchid-bee fauna at different distances from the edge. In all, 1,183 males from 20 species were collected. Only minor and insignificant variation in richness and abundance were observed among the sites. Two dominant species, Euglossa analis Westwood (Hymenoptera: Apidae) and Eulaema cingulata (Fabricius) (Hymenoptera: Apidae), showed strongly opposing habitat... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Euglossina; Bioindicator; Conservation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000300004 |
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| Moser,Thomas; Frankenbach,Silja. |
| The objective of this work was to clarify whether the method to extract nematodes from European soils is suitable for forest soils and litter in the eastern of Paraná state, Brazil, and whether nematode abundance differs between sites with different ecosystems and levels of human interference. The study sites were situated in the coastal area of the Serra do Mar, near the town of Antonina, in Eastern Paraná, Brazil. Cobb's sieving and decanting method was more appropriate than ISO method, since extraction efficiency was higher and intra-sample variability was significantly lower. In order to achieve an extraction efficiency higher than 90%, Cobb's method was modified. For the extraction of nematodes from litter, the Baermann funnel, with an extraction time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroforestry system; Bioindicator; Extraction method; Nematoda. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800027 |
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| Fernandes,Liliane Henriques; Nessimian,Jorge Luiz; Mendonça,Maria Cleide de. |
| The objectives of this work were to evaluate the richness and diversity of the Poduromorpha fauna in two biotopes in Restinga de Maricá, RJ, Brazil, to identify the characteristic species of each biotope and to determine the relationships between the community structure and the abiotic environmental parameters. Representatives of the Poduromorpha (Collembola) order were studied under an ecological viewpoint in halophyte-psammophyte vegetation and foredune zone in preserved areas of Restinga de Maricá, a sand dune environment in the state of Rio de Janeiro, Brazil. The foredune zone showed the highest diversity, richness and equitability of springtail species. Differences in the fundamental, accessory and accidental species in each environment were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioindicator; Ecology; Littoral; Springtails. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800036 |
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| Somogyi, Zoltan. |
| A fenntarthatóság mérése, de definiálása is nehézkes a jövőre vonatkozó feltételezések bizonytalansága miatt. Korlátozott következtetések vonhatók le pl. a „kereslet és kínálat” összehasonlításának elvén alapuló, egyre közismertebb ökológiai lábnyomból, vagy más, a fenntarthatóság bizonyos aspektusait részletesebben jellemző indikátorok tényleges értékeinek és az előre elvárt értékek összevetéséből. Ilyen, fejlődő, korlátozott lehetőségeket nyújtó indikátorrendszer jött létre az erdőgazdálkodásban. A rendszer használatát nagymértékben korlátozza, hogy megalapozatlan az, hogy hány, illetve mennyire specifikus vagy mennyire aggregált indikátorokat alkalmaznak, és hogy az indikátorok mért értékeit hogyan értelmezik. Emiatt az indikátorértékek értelmezésében... |
| Tipo: Journal Article |
Palavras-chave: Fenntartható fejlődés; Erdőgazdálkodás; Fenntarthatósági indikátor; Bioindikátor; Sustainable development; Forest management; Sustainability indicator; Bioindicator; Crop Production/Industries; Environmental Economics and Policy. |
| Ano: 2009 |
URL: http://purl.umn.edu/92482 |
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| Rebechi,Débora; Richardi,Vinicius S.; Vicentini,Maiara; Guiloski,Izonete C.; Assis,Helena C. Silva de; Navarro-Silva,Mário A.. |
| Low malathion concentrations influence metabolism in Chironomus sancticaroli (Diptera, Chironomidae) in acute and chronic toxicity tests. Organophosphate compounds are used in agro-systems, and in programs to control pathogen vectors. Because they are continuously applied, organophosphates often reach water sources and may have an impact on aquatic life. The effects of acute and chronic exposure to the organophosphate insecticide malathion on the midge Chironomus sancticaroli are evaluated. To that end, three biochemical biomarkers, acetylcholinesterase (AChE), alpha (EST-α) and beta (EST-β) esterase were used. Acute bioassays with five concentrations of malathion, and chronic bioassays with two concentrations of malathion were carried out. In the acute... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acetylcholinesterase; Bioindicator; Esterases; Organophosphate; Toxicity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300012 |
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| Rebechi,Débora; Navarro-Silva,Mário Antônio. |
| Species of Chironomidae are widely used as bioindicators of water quality, since their larvae undergo morphological deformities when in contact with sediment contaminated with chemicals. In this work we endeavored to study the morphology of head structures (antennae, mandible, mentum, pecten epipharyngis, ventromental plate and premandible) throughout the development of the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981, which can be used in environmental impact analyses. Our results show that it is possible to differentiate among larval instars by doing a quantitative analysis on the number of striae on the ventromental plates. The six structures analyzed changed during larval ontogeny. These changes are part of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioindicator; Larva; Mosquito; Morphology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200009 |
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| Registros recuperados: 32 | |
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