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Institution

Federal University of Roraima

Education
About: Federal University of Roraima is a based out in . It is known for research contribution in the topics: Population & Thermogravimetry. The organization has 981 authors who have published 1218 publications receiving 7849 citations. The organization is also known as: Federal University of Roraima.


Papers
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Journal ArticleDOI
TL;DR: Gasparini et al. as mentioned in this paper presented a paper on the evolution of fossils in the context of the Argentine National Museum of Paleontology (MPMV) and the Consejo Nacional de Investigaciones Cientificas and Tecnicas.
Abstract: Fil: Gasparini, German Mariano. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Division Paleontologia Vertebrados; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas; Argentina

11 citations

Journal ArticleDOI
TL;DR: This revision of Leptolobium Vogel includes an identification key, descriptions, illustrations, and distribution maps for the taxa, and the lectotype of Sweetia glazioviana Harms is designated in this paper.
Abstract: Este trabalho apresenta uma revisao taxonomica de Leptolobium Vogel, incluindo chave de identificacao, descricoes, ilustracoes e mapas de distribuicao dos taxons. Leptolobium, com 12 especies aceitas, inclui arvores ou arbustos com flores de corola branca, actinomorfa a levemente zigomorfa, 10 estames livres, ovario estipitado multiovulado, legumes indeiscentes, samaroides ou nucoides, sementes compressas e eixo hipocotilo-radicula bulboso. Leptolobium e um genero exclusivamente neotropical, ocorrendo desde o sul do Mexico ate o norte da Argentina. Onze especies ocorrem no Brasil, sendo sete especies endemicas. O lectotipo de Sweetia glazioviana Harms e designado neste trabalho. Em adicao, sao apresentadas informacoes sobre usos, nomes populares, distribuicao geografica e habitats de cada especie.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the authors evaluated whether the use of pitfall traps or Winkler extractors influenced the utility of genus as a surrogate to predict patterns of species richness and composition related to environment.
Abstract: Survey costs and a lack of taxonomists are often the main impediments to biodiversity inventories. The use of a higher-taxon approach that is efficient in representing species patterns within a short period of time is one way to overcome these constraints, especially if these responses are consistent at various spatial scales and sampling techniques. Here, we evaluated whether the use of pitfall trapping or Winkler extraction influenced the utility of genus as a surrogate to predict patterns of species richness and composition related to environment. The study sites were spread along 10 degrees of latitude, covering phytophysiognomies with different topographic characteristics. We recorded 450 ant species/morphospecies distributed in 70 genera. Pitfall-traps captured a larger proportion of species (77–98%) and genera (71–100%) per site. Genus was efficient in predicting variations in richness, and assemblage composition detected at the species level, using pitfall-traps or Winkler extractors. The higher-taxon approach saved approximately 40% of the surveys costs. The negative effect of the species-genus ratio was detected only on species composition, but it did not affect the quality of predictions using genera. The results are consistent with the hypothesis that genus can be used as a proxy for broader sets of species independent of sampling technique or environmental heterogeneity. The use of pitfall-traps or Winkler extractors for genus-level identification proved to be cost-efficient and time-efficient and should work well in other regions requiring conservation effort and monitoring programs.

11 citations

04 May 2015
TL;DR: In this paper, a trabalho analyzes a dinâmica da feira dos agricultores familiares do municipio de Turmalina, Alto Jequitinhonha, MG.
Abstract: Os programas de desenvolvimento atuais precisam ampliar seus trabalhos de assistencia para as populacoes mais carentes na forma de alternativas concretas em campos de acao muito localizados. Este e o caso das feiras livres agricolas de agricultores familiares. Estas feiras sao o principal vinculo comercial que o produtor tem com a sociedade dos centros urbanos e que lhe permitem a obtencao de uma renda para sua familia. Assim, este trabalho analisa a dinâmica da feira dos agricultores familiares do municipio de Turmalina, Alto Jequitinhonha, MG. Ao analisar a problematica dos produtores feirantes e seu relacionamento com outros atores sociais, procura-se compreender os “alcances” da feira em termos economicos, ou seja, a forca de trabalho utilizada e as formas de construcao de renda para este mercado local. Uma parte fundamental da pesquisa foi identificar os espacos de reproducao social e cultural das familias que participam da feira, assim como o desempenho e participacao dos membros da unidade familiar na sua organizacao produtiva.

11 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20222
2021125
2020183
201992
201899