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Registros recuperados: 34 | |
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Souza,Luceli de; Campos,Maria J. de O.. |
The composition and diversity of bees in an agricultural area in Rio Claro, state of São Paulo, Brazil, were studied from May 2003 to June 2004, using Moericke traps. The collection site, an area with 58.08 hectares, is characterized by grain production and direct planting, with 70% of the surrounding area planted with sugar cane. During the study, 456 bees were collected, distributed among 20 genera, pertaining to the families Andrenidae (4.8%), Apidae (40.8%) and Halictidae (54.4%). Specimens of genera Dialictus (38%) and Diadasia (30%) predominated in this area. The species diversity, assessed using the Shannon and Simpson indices, were H=1.88 and 1/ D= 4.15, respectively, and the Evenness index was 0.61. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Apifauna; Annual crops; Direct planting; Pantraps. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000200012 |
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Bernadochi,Ligia Coletti; Silvestri,Fausto; Turra,Alexander. |
The composition and seasonal variation of brachyuran and anomuran species associated with mussel farms were evaluated at Praia da Cocanha, São Paulo between May 2007 and February 2008. Nine mussel ropes were sampled at random in each quarter, and 1,208 organisms were identified, comprising five families and 28 species. The most numerous species was the porcellanid Pachycheles laevidactylus (18.5%), followed by the xanthids Acantholobulus schmitti (16.6%), Hexapanopeus paulensis (11.3%), Panopeus americanus (10.2%), and Menippe nodifrons (8.4%). The exotic crab Charybdis hellerii was recorded throughout the study period. The ecological descriptors, except Pielou evenness index, varied significantly over the time. The highest abundance and diversity of the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Associated fauna; Mussel culture; Perna perna; Crustaceans; Community ecology. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000400010 |
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Rossa-Feres,Denise de C.; Jim,Jorge; Fonseca,Mariluce Gonçalves. |
The diet of tadpoles of 13 anuran species was determined to verify whether food resource partitioning occurs and whether the degree of diet similarity is related to taxonomic affinity. Tadpoles of all species studied were mainly herbivorous, except for these of Leptodactylus fuscus (Schneider, 1799) which were mycophagous. Although some species had exclusive items in their diet, most tadpole species ingested the same items, but differed in the amount of each item consumed. Two guilds were found: tadpoles that feed on diatoms on the pond bottom, and tadpoles that feed on Oedogonium Link, 1820 algae in midwater. Diet similarity was related to the taxonomic relationship, microhabitat and feeding behavior of tadpoles indicating that the community organization... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Food partitioning; Microalgae. |
Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000400003 |
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Valente,Emilia de Brito; Pôrto,Kátia Cavalcanti; Bastos,Cid José Passos; Ballejos-Loyola,Jana. |
Bryophytes constitute an important component of tropical rain forests, which provide microhabitats favorable for their establishment. Bryophytes are also quite responsive to changes in microclimate, which makes them good bioindicators. This study aimed to determine the diversity and distribution of bryophytes in upper and lower montane forests of the Chapada Diamantina region of the state of Bahia, Brazil. To that end, we studied community aspects such as richness, diversity, substrates colonized, life forms and floristic similarity between areas and regions. In 2007 and 2008, we collected specimens from six forest sites, located from the north to the south of the Chapada Diamantina region. We identified a total of 205 infrageneric taxa. In comparison with... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mosses; Liverworts; Community ecology; Elevational gradient. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300008 |
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Sousa,José Roberto Pereira de; Esposito,Maria Cristina; Carvalho Filho,Fernando da Silva. |
Diversity of Calliphoridae and Sarcophagidae (Diptera, Oestroidea) in continuous forest and gaps at different stages of regeneration in the Urucu oilfield in western Brazilian Amazonia. The diversity of Calliphoridae and Sarcophagidae in continuous forest and gaps at different stages of regeneration was studied in the Urucu river basin, in Coari, state of Amazonas, Brazil. The flies were collected at 16 sampling points, 12 in gaps at different stages of regeneration (early _ C1, mid- C2 and late successional _ C3) and four in continuous forest _ MT. The diversity of blowflies was similar in the two less regenerated habitats (C1 and C2), and lower than that in the late successional (C3) and continuous forests (MT). By contrast, the diversity of flesh flies... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthropogenic impacts; Blowflies; Community ecology; Flesh flies; Neotropical region. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000400014 |
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Mendes,Mayara Ferreira; Valer,Felipe Berti; Vieira,Júlia Gabriela Aleixo; Blauth,Monica Laner; Gottschalk,Marco Silva. |
Abstract Although members of Drosophilidae are frequently the topic of ecological studies in Brazil, few have explored Restinga or, until only recently, Pampa biome environments. This study proposes to describe the diversity and temporal variation of the Drosophilidae assemblage from a Restinga forest of Rio Grande do Sul, Brazil. We performed monthly collections from February 2013 to January 2014 using yeasted banana-baited traps. A total of 25,093 individuals of 46 species were sampled. Drosophila simulans and the D. willistoni subgroup were the dominant taxa; D. polymorpha, D. immigrans, D. paraguayensis and Zygothrica orbitalis were of intermediate abundance, and the other 40 species were rare. Based on sampling effort estimators, our collections were... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity analysis; Community ecology; New distribution record; Pampa biome; Taxonomic survey. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000300248 |
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Oliveira,Leandro Gonçalves; Bispo,Pitágoras da Conceição; Sá,Nívia Custódio de. |
Relationships among some abiotic factors (temperature, velocity, flow, conductivity, oxy-reduction potential and pH) and the seazonal density of benthic insects (immature forms) of the orders Ephemeroptera, Plecoptera and Trichoptera at the Parque Ecológico de Goiânia, Goiás are studied. An area of 1m² was sampled and abiotic factors were recorded in 4 sites from August/1994 to July/1995. The faunistic composition was 75% Ephemeroptera, 1% Plecoptera and 24% Trichoptera. The data suggest the water velocity and flow as the main factors that determined the aquatic insects abundance. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Aquatic insects; Lotic; Abiotic factors. |
Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400010 |
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Conde-Saldaña,Cristhian C.; Albornoz-Garzón,Juan G.; López-Delgado,Edwin O.; Villa-Navarro,Francisco A.. |
ABSTRACT Ecomorphological patterns of the fish community were evaluated in the trans-Andean Alvarado River drainage, Colombia. A total of 29 species using 25 ecomorphological indices were analyzed to test how well the ecomorphological patterns are related to the fish assemblage. Although a significant correlation was found (Mantel test) between morphological attributes and trophic guilds, habitat use and distribution across the altitudinal gradient, only the last two were significantly independent of the phylogenetic relationships (partial Mantel test). Regarding the ecomorphological space, two main trends were defined. First, benthic periphytivores and invertivores were characterized by having dorsal or dorsolateral eyes, labial appendages, depressed... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alvarado River drainage; Community ecology; Habitat use; Morphological diversity; Neotropical region. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400204 |
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Dias-Terceiro,Randolpho Gonçalves; Peixoto,Gabriela Marques; Gomes,Vitor Serrano; Menezes,Marcelo Costa; Neco,Eudécio Carvalho; Pessoa,Tainá Sherlakyann Alves; Fabricante,Juliano Ricardo; Albuquerque,Manoel Bandeira. |
Epiphytes are common in the canopy of temperate and tropical forests, where they substantially contribute to species diversity and to key ecosystem processes. However, little is known about the effects caused by deforestation on this group of species, especially in northeastern Brazil, an area experiencing intense anthropogenic pressure. This study aimed to evaluate the effect of environmental variables on the structure of assemblies of vascular epiphytes in a fragment of open ombrophilous forest, Areia, northeastern Brazil. Sixty 10 × 10 m sampling plots were installed to cover different environments within the fragment. The relationship between environmental variables and species composition was evaluated by means of a generalized linear mixed model. The... |
Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Brejo de altitude; Community ecology; Epiphytism; Environmental factors; Forest fragmentation. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200270 |
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Caron, Alexandre; UPR AGIRs, Department ES, Cirad, Harare Zimbabwe; UPR AGIRs, Department ES, Cirad, Montpellier France; Mammal Research Institute, Department of Entomology and Zoology, University of Pretoria, Pretoria, South Africa; alexandre.caron@cirad.fr; de Garine-Wichatitsky, Michel; UPR AGIRs, Deparmtent ES, Cirad, Harare, Zimbabwe; UPR AGIRs, Department ES, Cirad, Montpellier, France; degarine@cirad.fr; Gaidet, Nicolas; UPR AGIRs, Department ES, Cirad, Montpellier, France; nicolas.gaidet-drapier@cirad.fr; Chiweshe, Ngoni; UPR AGIRs, Department ES, Cirad, Harare, Zimbabwe; chiweshen@yahoo.co.uk; Cumming, Graeme S; Percy Fitz-Patrick Institute, DST/NRF Center of Excellence, University of Cape Town; Graeme.Cumming@uct.ac.za. |
Tipo: Peer-Reviewed Reports |
Palavras-chave: Avian influenza; Bridge species; Community ecology; Risk factor; Wild/domestic interface. |
Ano: 2010 |
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Correa,Sandra Bibiana. |
I investigated changes in abundance and spatial distribution of medium- and large-sized fishes (>100 mm) in an oxbow lake of the lower Apaporis River, Colombian Amazon, across three seasons (falling, low, and rising water). Fifty-three species in 13 families were collected from six habitats: lagoon channels, stream, flooded forests, isolated shrub patches, muddy beaches, and rocks. Abundance, biomass, and species richness were higher during the rising-water season and lower during falling-water season. Correspondence analysis (CA) showed that fish assemblages were associated to two basic habitat types. One assemblage of fishes was associated with densely vegetated and structurally complex habitats (flooded forest, lagoon channels, stream, and isolated... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Population abundance; Apaporis River; Habitat affinity. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200014 |
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Súarez,Yzel Rondon; Valério,Sabrina Bigatão; Tondado,Karina Keyla; Florentino,Alexandro Cezar; Felipe,Thiago Rota Alves; Ximenes,Lidiani Queli Lubas; Lourenço,Luzia da Silva. |
The influence of spatial, temporal and environmental factors on fish species diversity in headwater streams in Paraguay and Paraná basins, Brazil was examined. A total of 4,605 individuals were sampled, distributed in 60 species. The sampled streams in Paraná basin presented a larger total species richness (42) than Paraguay streams (40). However the estimated richness was larger in Paraguay basin (53) than Paraná streams (50). The streams of Paraná basin had a greater mean species richness and evenness, while more individuals per sample were found in the Paraguay basin. Difference between the sub-basins were found in the Paraguay basin, while for the basin of Paraná, richness and evenness vary significantly between the sub-basins, but the number of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Fish diversity; Streams; Paraguay Basin; Paraná Basin. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000700014 |
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Registros recuperados: 34 | |
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