Niche Ecology
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Paleobiogeographic evolution and distribution of Carcharodontosauridae (Dinosauria, Theropoda) during the middle Cretaceous of North Africa
Abstract Over the last few decades, the systematics and evolution of carcharodontosaurids, a group of large predatory dinosaurs, from North Africa have been better understood mainly due the discovery of new species. We review this record here and discuss its importance for understanding the evolution and ecology of these dinosaurs. North Africa has one of th
Pap. Avulsos Zool.. Publicado em: 26/07/2018
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2. The trophic niche of Mesoclemmys vanderhaegei (Testudines: Chelidae): evidence from stable isotopes
ABSTRACT Ecological niche is the multidimensional space comprising the resources used by an organism. Intraspecific variation in resource exploitation is common in reptile populations to maximize coexistence of individuals. The use of stable isotope analysis is an effective tool when there are variations in resource exploitation, since it can provide quantit
Zoologia (Curitiba). Publicado em: 23/10/2017
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3. Leishmaniasis transmission: distribution and coarse-resolution ecology of two vectors and two parasites in Egypt
Introduction: In past decades, leishmaniasis burden has been low across Egypt; however, changing environment and land use has placed several parts of the country at risk. As a consequence, leishmaniasis has become a particularly difficult health problem, both for local inhabitants and for multinational military personnel. Methods: To evaluate coarse-resol
Rev. Soc. Bras. Med. Trop.. Publicado em: 2014-01
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4. Feeding ecology of stream-dwelling Characidae (Osteichthyes: Characiformes) from the upper Tocantins River, Brazil
In this contribution we studied the trophic ecology of four Characidae species from the Cavalo Stream, upper Tocantins River, considering diet overlap and trophic niche breadth. The diet of the four species was composed of adult and immature insects, both autochthonous and allochthonous in origin. Autochthonous items dominated the diet of Moenkhausia dichrou
Zoologia (Curitiba). Publicado em: 06/12/2013
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5. Dung beetle assemblages (Coleoptera, Scarabaeinae) in Atlantic forest fragments in southern Brazil
Dung beetle assemblages (Coleoptera, Scarabaeinae) in Atlantic forest fragments in southern Brazil. The beetles of the subfamily Scarabaeinae are important organisms that participate in the cycle of decomposition, especially in tropical ecosystems. Most species feed on feces (dung) or carcasses (carrion) and are associated with animals that produce their foo
Rev. Bras. entomol.. Publicado em: 2013-03
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6. MORCEGOS (MAMMALIA, CHIROPTERA) DE UMA ÁREA DE CAATINGA DO ESTADO DE SERGIPE: ecologia de comunidade, padrão de atividade e nicho temporal. / BATS (MAMMALIA, CHIROPTERA) AN AREA OF THE STATE OF CAATINGA SERGIPE: community ecology, activity patterns and temporal niche.
A Caatinga é o único bioma exclusivamente brasileiro e estende-se por oito estados do nordeste e um do sudeste, cobrindo 735.000 km2. Apresenta como uma de suas principais características a alta temperatura média anual e evapotranspiração, baixa precipitação, em torno de 240 e 1500 mm, e baixa umidade relativa. A vegetação desse bioma é composta p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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7. Estrutura de comunidades de espécies lenhosas ao longo de um gradiente de altitude na floresta ombrófila densa atlântica do sudeste brasileiro : uma abordagem filogenética e funcional / Community structure of woody species along an altitudinal gradient on the atlantic ombrophilous dense forest in southeastern Brazil : a phylogenetic and functional approach
Um grande número de espécies co-ocorre em florestas tropicais. Diferenciação de nicho e processos estocásticos são invocados como mecanismos que possibilitam essa coexistência de espécies. Recentemente, métodos filogeneticamente explícitos ou com base em atributos funcionais (considerados bons indicadores de nicho de regeneração, história de vid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/02/2012
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8. Feeding ecology of the pygmy gecko Coleodactylus natalensis (Squamata: Sphaerodactylidae) in the Brazilian Atlantic Forest
We studied the feeding ecology of a population of Coleodactylus natalensis Freire, 1999, an endemic gecko of Atlantic Forest fragments in the state of Rio Grande do Norte, northeastern Brazil. Lizards (N = 49) were collected manually through active search in the four habitats of Parque Estadual Dunas de Natal, type locality of the species. In the laboratory,
Zoologia (Curitiba). Publicado em: 2012-08
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9. Trophic ecology and microhabitat utilization by the Bufo gargarizans, Rana guentheri, and Rana limnocharis in southwestern China
We studied the trophic ecology and microhabitat use of the Asiatic toad, Bufo gargarizans Cantor, 1842; Guentheri frog, Rana guentheri (Boulenger, 1882); and the Ricefield frog, Rana limnocharis (Boie, 1834). These three species are common around Nanchong City, in southwestern China, where they live in the same habitat before hibernation. The main objective
Zoologia (Curitiba). Publicado em: 2012-02
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10. Distribuição, nicho potencial e ecologia morfológica do gênero enyalius (squamata, leiosauridae) : testes de hipotéses para lagartos de florestas continentais brasileiras
In the first chapter, we saw that the main factors affecting the Enyalius¿ geographical distribution were the annual mean temperature, latitude, and the mean diurnal temperature, which indicates a possible thermal adaptation as a base to explain the group distribution. Enyalius distribution was reflected in the morphological geographical variation, as demon
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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11. Ecologia alimentar da toninha Pontoporia blainvillei (Cetacea) / Feeding ecology of franciscana dolphin Pontoporia blainvillei (Cetacea)
Ecological niche theory is originally based on the assumption that individuals of a species use similar resources and therefore are ecologically equivalents. Under this framework, the niche of the species can be defined in terms of average resource use. However, factors such as quality and quantity of prey resources in the environment, consumer gender, age o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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12. Mecanismos de coexistência em florestas tropicais : variações ontogenéticas de arquitetura aérea, padrão espacial e performance de espécies congenéricas simpátricas em uma floresta tropical úmida de terras baixas / Coexistence mechanisms in tropical forests : ontogenetic variation in aboveground architecture, spatial patterns and performance of sympatric congeneric species in a lowland tropical rain forest
A alta diversidade em florestas tropicais tem motivado questionamentos sobre a importância da diferenciação de nicho como mecanismo de coexistência. Nessa hipótese, a heterogeneidade ambiental proporcionaria eixos de diferenciação que facilitariam a coexistência, sendo, portanto, esperadas diferenças entre espécies na associação a gradientes espa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011