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| Registros recuperados: 86 | |
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| Vasconcelos,Heraldo L.; Araújo,Bruna B.; Mayhé-Nunes,Antonio J.. |
| Fungus-growing ants (tribe Attini) are characteristic elements of the New World fauna. However, there is little information on the patterns of diversity, abundance, and distribution of attine species in their native ecosystems, especially for the so-called "lower" genera of the tribe. A survey of attine ant nests (excluding Atta Fabricus, 1804 and Acromyrmex Mayr, 1865) was conducted in a variety of savanna and forest habitats of the Cerrado biome near Uberlândia, Brazil. In total, 314 nests from 21 species of nine genera were found. Trachymyrmex Forel, 1893 was the most diverse genus with 10 species. Eighteen species were found in the savannas, including Mycetagroicus cerradensis Brandão & Mayhé-Nunes, 2001, a species from a recently-described... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Community structure; Forest; Savanna; Trachymyrmex. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300009 |
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| Marinoni,Renato C.; Dutra,Renato R.C.; Mielke,Olaf H.H.. |
| In addition to the Survey of the Entomological Fauna in Paraná State, the Sphingidae was studied in its ecological and faunistic aspects. The material was collected using one light trap installed in eight different sites of the State (Antonina, São José dos Pinhais, Colombo, Ponta Grossa, Telêmaco Borba, Jundiaí do Sul, Guarapuava, and Fênix), from October 1986 to September 1987. A total of 813 specimens and 55 species was captured. The highest values of diversity (Brillouin and Shannon) was observed in São José dos Pinhais and Jundiaí do Sul; the highest values of evenness (Berger & Parker, and Simpson) in São José dos Pinhais and Antonina. Besides using ecological indices, the data were also compared by Clustering Analysis and Linear Correlation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sphingidae; Diversity; Community structure; Paraná State. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600023 |
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| Marinoni,Renato C.; Dutra,Renato R.C.. |
| In addition to the Survey of the Entomological Fauna in Paraná State, the Ctenuchidae were studied in its ecological and faunistic aspects. The material was collected using one light trap installed in eight different sites of the State: Antonina, São José dos Pinhais, Colombo, Ponta Grossa, Telêmaco Borba, Jundiaí do Sul, Guarapuava and Fênix, from October 1986 to September 1987. The total number of specimens and means values of capture were analyzed. Indices of diversity and evenness were used to discuss richness and dominance of species in each locality. Besides using ecological indices, the data were also compared by Clustering Analysis, Principal Coordinate Analysis and Linear Correlation Coefficient. The results were compared with meteorological and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ctenuchidae; Faunistic; Diversity; Community structure; Paraná State. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200014 |
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| Bueno,Alessandra A. P.; Bond-Buckup,Georgina; Ferreira,Bibiana D. P.. |
| The benthic fauna has an important role in the trophic chain of limnic environments, serving as food for fishes and crustaceans. This work aimed to identify and compare, quantitative and qualitatively, the macrobenthic communities from two watercourses in Rio Grande do Sul State. Samplings were done with a Surber sampler, monthly, from September 1999 to August 2000, in one of the creeks forming Tainhas River(29º15'30,2"S, 50º13'12,5"W), around São Francisco de Paula city and in Mineiro Creek (29º30'0,2"S, 50º46'50"W), around Taquara city. At each sampling point, physical and chemical variables of the waters were registered. In the laboratory, the samples were sorted out and the animals identified and quantified. Dissolved oxigen, pH and stream speed were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic factors; Benthic invertebrates; Community structure; Diversity indexes; Rio Grande do Sul. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100014 |
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| Luque,José Luis; Chaves,Nilton Domingos. |
| Fifty-five specimens of bluefish, Pomatomus saltator (Linnaeus, 1766), collected at Cabo Frio (23ºS, 42ºW), State of Rio de Janeiro, Brazil, between March 1995 and November 1995, were necropsied to study their infracommunities of metazoan parasites. Sixteen species of metazoan parasites were collected. All fish were parasitized by one or more metazoan. The digeneans were the majority of the parasite specimens collected, with 44.2%, followed by the helminth larval stages (cestodes, acanthocephalans, and nematodes) with 40.6%. The Simpson index for all parasite species was 0.097, indicating lack of dominance by any species in the parasite community. Microcotyle pomatomi Goto, 1899 showed the higher frequency of dominance and mean relative dominance. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pomatomidae; Pomatomus saltator; Parasitic ecology; Community structure; Marine fish; Bluefish; Brazil. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300010 |
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| Luque,José Luis; Alves,Dimitri Ramos. |
| Sixty specimens of Caranx hippos (Linnaeus, 1766) and fifty-five specimens of Caranx latus Agassiz, 1831 collected from the coastal zone of the State of Rio de Janeiro (21-23ºS, 41-45ºW), Brazil, from October 1998 to October 1999, were necropsied to study their metazoan parasites. All specimens of C. hippos were parasitized, and the majority of specimens of C latus (96.4%) were parasitized by one or more metazoan species. Nineteen species of parasites were collected in C. hippos: 5 digeneans, 5 monogeneans, 2 cestodes, 5 nematodes, and 2 copepods. Seventeen species of parasites were collected in C. latus: 6 digeneans, 2 monogeneans, 3 cestodes, 4 nematodes, and 2 copepods. The endoparasites (digeneans, cestodes, and nematodes) were the majoriry, 76.4% and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carangidae; Caranx hippos; Caranx latus; Parasitic ecology; Community structure; Marine fish; Brazil. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000200011 |
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| Bezerra,Cleomar Porto; Martins,Celso Feitosa. |
| The use of fragrances to attract males of Euglossinae bees has been an important tool to increase the knowledge of the group. In the Northeastern of Brazil, studies on euglossine bees are still uncommon, mainly in urban areas. The goals of this study are to identify the Euglossinae species composition, to know the diversity and the community structure of Euglossinae species, verify their preferences for different fragrances and evaluate the phenology of these species, in two Atlantic Forest fragments of the city of João Pessoa, Paraíba state, Brazil. Bees were sampled at 15 days intervals, over the course of one year, from 8:00 to 17:00 hours, through the use of traps baited with seven types of fragrances. In both areas, 1082 individuals belonging to nine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euglossinae bees; Diversity; Community structure; Atlantic Forest. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000300018 |
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| NOBRE,Regina L. G.; CALIMAN,Adriano; GUARIENTO,Rafael D.; BOZELLI,Reinaldo L.; CARNEIRO,Luciana S.. |
| ABSTRACT The introduction of nonnative species is one of the main threats to freshwater ecosystems. Although omnivory and intraguild predation are common in those systems, little is known about the effects of introduced omnivorous fish on pelagic and littoral communities. This study tested predictions of food-web theory regarding the effects of omnivorous fish introduction on previously fishless lakes in the Amazonian uplands of Serra dos Carajás, Pará, Brazil. The trophic structure of two similar lakes, one with and the other without the introduced omnivorous fish Astyanax bimaculatus, was compared using a data series of biotic variables collected from both lakes twice a year from 2010 to 2013. Zooplankton was more abundant in the lake with fish, and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trophic cascade; Species translocation; Community structure; Biological invasions; Omnivory. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000300221 |
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| Costa,Flávia Regina Capellotto. |
| The herb community of tropical forests is very little known, with few studies addressing its structure quantitatively. Even with this scarce body of information, it is clear that the ground herbs are a rich group, comprising 14 to 40% of the species found in total species counts in tropical forests. The present study had the objective of increasing the knowledge about the structure and composition of the ground-herb community and to compare the sites for which there are similar studies. The study was conducted in a tropical non-inundated and evergreen forest 90 km north of Manaus, AM. Ground herbs were surveyed in 22 transects of 40 m², distributed in five plots of 4 ha. The inventoried community was composed of 35 species, distributed in 24 genera and 18... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Community structure; Herbs; Tropical forest; Understory. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000100007 |
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| Camargo, Nilce Svarcz Jungles de; Lehun, Atsler Luana; Rosa, Jonathan; Bueno-Krawczyk, Ana Carolina de Deus. |
| The objective of this research was to validate the colonization process on natural and artificial substrates by benthic invertebrates in a tropical stream in South Brazil. The samples were performed in July and August-2012, and 32 samplers were used, being 16 natural and 16 artificial substrates. In each sample, two replicas were taken for each substrate at the 2th, 4th, 7th, 14th, 21th 28th, 35th and 42th days of colonization. The organisms were identified to the lowest possible taxonomic level. In both substrates 3,070 benthic invertebrates were detected, of which 1,753 individuals were collected on the natural substrate, and 1,317 on the artificial substrate. From the identified taxa 8.5% were not dominant (Anacroneuria, Orthocladiinae, Tupiara,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community structure; Diversity; Tropical stream; Limnology; Simulium. Community structure; Diversity; Tropical stream; Limnology; Simulium.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/45872 |
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| OLIVEIRA,JANE C.F.; PEREIRA-RIBEIRO,JULIANE; WINCK,GISELE R.; ROCHA,CARLOS F.D.. |
| Abstract Data on the structure of lizard communities in the different biomes and ecosystems of Brazil are still limited. In this study, we related the species richness, abundance and the spatial occurrence of lizards to the structure of the vegetation found on the coast of the state of Espírito Santo, southeastern Brazil, to determine whether habitat influences the structure of lizard communities. We conducted fieldwork in 2012, 2013 and 2014, collecting data in standardized samples. We analyze whether variables of vegetation structure influenced species richness and abundance, using Generalized Linear Models (GLMs). We recorded 12 lizard species from eight families. In general, species richness and abundance were similar among sites. Locally, we recorded... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community ecology; Community structure; Mesohabitat; Squamata. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100602 |
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| ALVES,DOUGLAS F.R.; BARROS-ALVES,SAMARA P.; LIMA,DANIEL J.M.; COBO,VALTER J.; NEGREIROS-FRANSOZO,MARIA LUCIA. |
| The main goals of this investigation were to describe the community structure of anomuran and brachyuran crabs inhabiting reefs constituted by colonies of Schizoporella unicornis, and to provide a species importance ranking for this community. Collections were carried out on S. unicornis reefs at two-month intervals from May 2003 to May 2004, in the rocky sublittoral of the southeastern Brazilian coast. Relative abundance and occurrence were used to rank these species in the hierarchy importance. A total of 2,018 individuals were obtained, in 11 families, 22 genera and 31 species. Porcellanidae and Pilumnidae were the most abundant families, comprising respectively almost 60% and 15% of individuals sampled. The species ranking indicated four main groups A,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogenic substrata; Bryozoan; Community structure; Decapods; Symbiotic species. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100245 |
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| Viana,Blandina Felipe; Kleinert,Astrid de Matos Peixoto. |
| We analyzed aspects of the community structure of Apoidea of a restricted area of dunes with restinga vegetation in Salvador, Bahia, Brazil. Standardized samples were taken for one year, 3 times a month from 6:00 a.m. to 6:00 p.m. A total of 3983 individuals (3770 females and 213 males) of 49 species, grouped into 13 morpho-functional types and belonging to five families, were collected from flowers in its majority. The fauna of Abaeté is composed by large solitary bees, best represented by Anthophoridae followed by Apidae; Halictidae; Megachilidae and Colletidae. Bees were active throughout the year, with peaks of abundance in periods of low rainfall. Daily activity was greatest between 08:00 and 14:00 hours, when relative humidity was lower and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bee's abundance; Bee diversity; Community structure; Restinga and dunes; Morpho-functional groups; Northeast Brazil. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300005 |
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| Pereira,Carlos; De Roa,Evelyn Zoppi; Montiel,Edie; Hernández,Vanessa; Castillo,Anyoelis. |
| ABSTRACT Microphytobenthos is a community that groups benthic photosynthetic microorganisms. In Venezuela and the other countries in the Caribbean Sea, this group has been scarcely studied, so its diversity is unknown. This study aims to describe the spatial and temporal variations of its composition and abundance in the central coastal zone of Venezuela. Samplings were conducted monthly from June 2014 to March 2015, in random stations at depths less than 20 m. Richness and abundance data were processed through multivariate hypothesis tests (Anosim - SIMPER - nMDS). A total of 327 species were identified, with a dominance of diatoms and dinoflagellates, without significant spatial and temporal variations. In terms of abundance, the most representative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community structure; Marine ecology; Caribbean Sea; Microalgae. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000200029 |
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| Registros recuperados: 86 | |
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