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| Registros recuperados: 25 | |
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| Pivari,Marco Otávio Dias; Melo,Pablo Hendrigo Alves de; Souza,Filipe Soares; Stehmann,João Renato; Moura Júnior,Edson Gomes de; Moreira,Suzana Neves; Pott,Vali Joana; Pott,Arnildo; Lopes,Aline; Moço,Maria Cecilia Chiara; Oliveira,Lukiel dos Santos; Lins,Alba Lucia de Almeida; Arruda,Rafael; Morais,Isa Lucia de; Silva,Gustavo Santos; Ferreira,Régis Moreira. |
| ABSTRACT Initiatives directed at managing information on aquatic plants can support different areas of scientific research, educational practices and political decisions for sustainable management and protection of wetlands and natural resources, as well as reveal knowledge gaps regarding aquatic plants and wetlands. Furthermore, such initiatives can contribute directly to consolidating wetland classification systems in Brazil. The objectives of this work are to present and explore the use of a data repository and online platform created specifically for the management of data on aquatic plants in Brazil. The data repository for aquatic plants was developed to store information on species occurrence records in a standardized form considering: systematics,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic macrophytes; Biodiversity conservation; Data platform; Data repository; Environmental variables; Wetland classification. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100078 |
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| Souza, Bruna D'Ângela de; UENF; Fernandes, Valéria Oliveira; UFES. |
| O presente estudo objetivou avaliar a estrutura e dinâmica da comunidade fitoplanctônica e sua relação com as variáveis ambientais na lagoa Mãe-Bá. Foram realizadas quatro amostragens com periodicidade quinzenal, abrangendo as estações seca e chuvosa, na região limnética de dois pontos de amostragem submetidos a diferentes condições ambientais. O fitoplâncton foi analisado quanto à riqueza, densidade total, abundância, dominância, diversidade e equitabilidade. Foram determinados: temperatura (ar/água), transparência, zona eufótica, profundidade, pH, oxigênio dissolvido, turbidez, condutividade elétrica, sólidos totais dissolvidos e suspensos, concentrações de nutrientes. Foram registrados 138 táxons, sendo a Classe Cyanophyceae mais representativa em... |
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Palavras-chave: 2.00.00.00-6 Ciências Biológicas fitoplâncton; Lagoa costeira; Variáveis ambientais Botânica phytoplankton; Coastal lagoon; Environmental variables. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1266 |
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| GONÇALVES,DARLENE S.; CRIVELLARI,LUCAS B.; CONTE,CARLOS EDUARDO. |
| ABSTRACTAmphibian distribution patterns are known to be influenced by habitat diversity at breeding sites. Thus, breeding sites variability and how such variability influences anuran diversity is important. Here, we examine which characteristics at breeding sites are most influential on anuran diversity in grasslands associated with Araucaria forest, southern Brazil, especially in places at risk due to anthropic activities. We evaluate the associations between habitat heterogeneity and anuran species diversity in nine body of water from September 2008 to March 2010, in 12 field campaigns in which 16 species of anurans were found. Of the seven habitat descriptors we examined, water depth, pond surface area and distance to the nearest forest fragment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Environmental variables; Generalized linear models; Hierarchical partitioning. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401751 |
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| Bagatini,Inessa Lacativa; Spínola,Ana Lúcia Gerardi; Peres,Bianca de Miranda; Mansano,Adrislaine da Silva; Rodrigues,Mafalda Alexandra Antunes; Batalha,Marco Antônio Portugal Luttembarck; Lucca,José Valdecir de; Godinho,Mirna Januária Leal; Tundisi,Takako Matsumura; Seleghim,Mirna Helena Regali. |
| Protozooplankton is an important component of the aquatic microbial food webs and its composition, density, and distribution reflect the chemical, physical, and biological aspects of the environment. Considering the scarce literature on freshwater protozoans in Brazil and on protozoan ecology in subtropical environments, we listed the ciliates and amoebae taxa found in 13 water bodies in São Paulo State and analyzed their abundance in relation to the environmental variables. We collected two samples in each environment, fixed immediately with mercuric chloride and stained with bromophenol blue. After microscopical analysis, 74 protozoan genera were identified and the Ciliophora were dominant in the majority of the environments. The Stichotrichia,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciliates; Amoebae; Plankton; Environmental variables; Freshwater. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400152 |
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| Pedrozo,Catarina da Silva; Rocha,Odete. |
| The purpose of the present work was to evaluate the environmental quality of Marcelino, Pinguela, Peixoto, Palmital, Malvas and Do Passo lakes, interconnected by canals and located in the district of Osório, RS. In this context, 29 physical and chemical variables were analyzed with sampling carried out in January, May, July and October 1997 to verify the environmental quality of the system and the existence of a gradient of quality. Canonical Analysis was applied to the data of all environmental variables measured, and showed that the lakes had different characteristics as a consequence of the organic pollution received. Marcelino lake received continuous input of organic matter from the sewage treatment works in the town of Osório, whereas Peixoto,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Castal lakes; Water quality; Environmental variables; Limnological characteristics. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400013 |
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| Gomes,Marcelo Paes; Cunha,Miguel Siano; Zalmon,Ilana Rosental. |
| Spatial and temporal variations of diurnal ichthyofauna and the environmental variables influences on its distribution were studied at the surf-zone of three beaches of São Francisco do Itabapoana, northern coast of Rio de Janeiro, Brazil. From August/1999 to August/2000, three beach seine hauls were made monthly, and environmental variables were recorded. A total number of 4,562 fishes (74,155g) were sampled at the three beaches, where estuarine-dependent species prevailed (44%), followed by marine (31%), estuarine (19%) and freshwater species (3%). Species richness, number of individuals and wet weight were significantly higher at Gargaú, followed by Manguinhos and Barra do Itabapoana, respectively. Canonical Correspondence Analysis highlighted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spatial and temporal variations; Community ichthyofauna structure; Surf-zone; Environmental variables; North coast of Rio de Janeiro. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400020 |
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| Silva,Marília Goulart da; Pozza,Edson Ampélio; Lima,Caio Vitor Rodrigues Vaz de; Fernandes,Tales Jesus. |
| ABSTRACT Difficulty in obtaining abundant sporulation in culture of many species of Cercospora may be the limiting factor for studies of biology, systematics, and inoculation of the genus. Therefore, it is necessary to understand the nutritional and environmental requirements that influence mycelial growth, sporulation and germination. As it is difficult to obtain conidia of Cercospora coffeicola in vitro, different temperatures (17, 22, 27, and 32 °C) and light intensities (80, 160, 240, and 320 μmol m-2 s-1) were evaluated to optimize pathogen sporulation and assess favorable conditions for spore germination, aiming for a strategy of disease control. The dark treatment (0 μmol m-2 s-1) was added for sporulation. A significant interaction was found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental variables; Cercospora leaf spot; Coffea arabica. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200198 |
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| Funo,Izabel Cristina da Silva Almeida; Antonio,Ícaro Gomes; Marinho,Yllana Ferreira; Monteles,Josinete Sampaio; Lopes,Rodolf Gabriel Prazeres Silva; Gálvez,Alfredo Olivera. |
| ABSTRACT: The purpose of this study was to determine the moment of the year for the oyster recruitment and define the type of collector and environmental conditions that maximize recruitment. Collections were conducted, during 12 months, on Amazon Macrotidal Mangrove at two different sites: raft (point I) and mangrove (point II). In each location three types of collectors were used (1) transparent PET bottles, (2) green PET bottles, and (3) PVC sheets, each with three replicates. Spats were counted and measured at 45-day intervals, while the environmental data were measured every two weeks. Identification of oyster species occurred by genetic testing (multiplex PCR) by randomly selecting individuals by sampling. Results indicated spat capturing was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mangrove oyster; Spat collection; Environmental variables. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000300650 |
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| Zamora Tirado, Paula Erika. |
| El presente el trabajo se desarrolló en la provincia fisiográfica Eje Volcánico Mexicano donde los procesos de erosión por cárcavas son frecuentes y relevantes, ocasionado importantes pérdidas económicas y ambientales, con el objetivo de caracterizar los parámetros ambientales que influyen en la formación de cárcavas, como: material parental, suelo, fase física, erosionabilidad, pendiente, longitud de pendiente, orientación, curvatura horizontal y vertical, índice de posición topográfica, índice topográfico de humedad, índice de Fournier, índice de vegetación ajustada al suelo y distancia a estructuras volcánicas. Se realizó un Análisis de Componentes Principales (ACP) con el propósito de identificar las variables que mejor expliquen la formación de... |
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Palavras-chave: Análisis de componentes principales; Análisis de máxima verosimilitud; Erosión en cárcavas; Modelación en cárcavas; Variables ambientales; Principal component analysis; Maximum likelihood analysis; Gully; Ravine modeling; Environmental variables; Edafología; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2372 |
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| Angeler, David G; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment; david.angeler@slu.se; Drakare, Stina; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment ; stina.drakare@slu.se; Johnson, Richard K; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment ; richard.johnson@slu.se. |
| Revealing the adaptive responses of ecological, social, and economic systems to a transforming biosphere is crucial for understanding system resilience and preventing collapse. However, testing the theory that underpins complex adaptive system organization (e.g., panarchy theory) is challenging. We used multivariate time series modeling to identify scale-specific system organization and, by extension, apparent resilience mechanisms. We used a 20-year time series of invertebrates and phytoplankton from 26 Swedish lakes to test the proposition that a few key-structuring environmental variables at specific scales create discontinuities in community dynamics. Cross-scale structure was manifested in two independent species groups within both communities across... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Complex adaptive systems dynamics; Complex adaptive systems organization; Cross-scale structure; Discontinuities; Environmental variables; Invertebrates; Lakes; Panarchy; Phytoplankton; Resilience; Time series modeling. |
| Ano: 2011 |
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| Espinosa,Mara I; Bertin,Angéline; Gómez,John; Mejía,Florencio; Guerra,Martha; Baez,Lina; Gouin,Nicolas; Patiño,Edgar. |
| The American crocodile, Crocodylus acutus, has experienced important population declines worldwide due to human persecution, overexploitation and habitat loss. C. acutus remains critically endangered in some countries such as Colombia where the lack of detailed surveys on its ecology and distribution constitutes a major barrier to the development of effective conservation strategies. We conducted a three-year capture-recapture study to investigate the demographic status of C. acutus and to identify environmental variables likely to in uence its distribution in Portete Bay (Colombia). We estimated the crocodile population to be relatively small (< 140 animals), to include very few adults, and to demonstrate a very strong de cit in females in the juvenile... |
| Tipo: Journal article |
Palavras-chave: Capture-recapture; Crocodile; Environmental variables; Mangrove. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382012000200006 |
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| Zank,Caroline; Di-Bernardo,Marcos; Maneyro,Raúl; Colombo,Patrick; Fusinatto,Luciana A.; Fonte,Luis Fernando M. da. |
| We studied the reproductive biology of a population of Pseudis minuta Günther, 1858 from Reserva Biológica do Lami (30º 15' S; 51º 05' W), Porto Alegre, southern Brazil. We assessed the spatial and temporal distribution of individuals (males, females, juveniles) and explored potential relationships with environmental variables. Field activities encompassed bimonthly surveys in three semi-permanent ponds, each one during approximately two days and two nights, from August 2004 to July 2005. We recorded differences in the sites used by males, females and juveniles, with males occupying deeper and more distant places from the border. The temporal distributions of individuals, calling sites and amplectant pairs indicated that the reproductive activity of P.... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Spatial-temporal distribution; Reproductive activity; Environmental variables; Pseudis minuta. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000200010 |
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| Pereira,AM; Chaud-Netto,J; Bueno,OC; Arruda,VM. |
| The presence of bees (Apis mellifera L.) in urban areas has increased in recent years due to environmental disturbances caused by humans. Bee migration to cities may provoke serious accidents, since some people present allergic reactions to their venoms. In Rio Claro city, São Paulo state, Brazil, the number of calls to the fire brigade for removal of bee swarms, and the number admissions in local hospitals due to bee stings were investigated during 2002 and 2003, and a correlation between these data and the average temperature, rainfall and relative humidity was found. The study period was divided into three phases according to the number of times that the fire brigade was called to remove swarms (263 times): January to July 2002 - 51 calls (19.39%);... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Synanthropism; Reproductive swarms; Absconding; Environmental variables; Honeybees. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000400016 |
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| Registros recuperados: 25 | |
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