Savanna Ecology
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Protocol for collecting Mutillidae (Hymenoptera, Aculeata) in ecological studies: species-area effects on Mutillidae communities
ABSTRACT The species-area relationship is one of the most consistent patterns in ecology, and fragmentation is a major cause of habitat loss. Environmental changes in a site can affect the spatial distribution of organisms. Knowledge of Mutillidae ecology is still scarce due to the lack of standardized sampling. Our aim was to: (1) determine the effect of ha
Rev. Bras. entomol.. Publicado em: 2016-12
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2. Natural history of Micrablepharus maximiliani (Squamata: Gymnophthalmidae) in a Cerrado region of northeastern Brazil
Micrablepharus maximiliani (Reinhardt & Luetken, 1861) is a microteiid lizard widely distributed in the open areas of South America. Little is known about its ecology and reproductive biology. Here, we analyzed aspects of the natural history of a population of M. maximiliani from a Cerrado area in the state of Piauí, northeastern Brazil. Our results suggest
Zoologia (Curitiba). Publicado em: 2014-04
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3. Phenology, biometric parameters and productivity of fruits of the palm Butia capitata (Mart.) Beccari in the Brazilian cerrado in the north of the state of Minas Gerais
The fruits of the palm Butia capitata are harvested from wild populations. A lack of knowledge of their ecology has hindered the establishment of sustainable management practices. We investigated fruit biometric parameters, yield and phenology in two populations of B. capitata in the cerrado (savanna) in the north of the state of Minas Gerais, Brazil, at two
Acta Bot. Bras.. Publicado em: 2013-09
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4. Taxonomic revision of Pseudolaelia Porto & Brade (Laeliinae, Orchidaceae)
Pseudolaelia is a genus endemic to eastern Brazil. The species are often epiphytes on Velloziaceae or are saxicolous, predominantly on granitic and gneissic outcrops (inselbergs) in the Atlantic Forest and, less often, in the campos rupestres (dry, rocky grasslands) of the cerrado (savanna) and caatinga (shrublands). The genus is characterized by homoblastic
Acta Bot. Bras.. Publicado em: 2013-06
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5. Ecology of interactions between ants and plants with extrafloral nectaries in a neotropical savanna: temporal variation in the network of interactions and their effects on leaf herbivory / Ecologia das interações entre formigas e plantas com nectários extraflorais em uma savana neotropical: variação temporal na rede de interações e seus efeitos sobre a herbivoria foliar
Estudos de interações envolvendo formigas e plantas com nectários extraflorais são comuns na literatura, entretanto, devido à grande diversidade de espécies envolvidas e à variação nos resultados das interações, pouco se conhece a respeito da dinâmica e estrutura dessas relações no âmbito da comunidade. Dessa forma, este estudo propôs avaliar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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6. Evolução e ecologia de tricomas em Bignonieae (Bignoniaceae): estruturas morfológicas de defesa anti-herbivoria? / Evolution and ecology of trichomes in Bignonieae (Bignoniaceae): morphological structures of anti-herbivory defense?
This thesis focused on the evolutionary-ecology of trichomes in the tribe Bignonieae (Bignoniaceae), and in the potential defensive role of these structures against herbivores. More specifically, we characterized four trichome morphotypes found in vegetative plant parts of representatives of the Bignonieae, as well as studied the macro-evolutionary patterns
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2011
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7. Composição e sazonalidade de borboletas frugívoras no cerrado, com ênfase na relação fenológica entre Eunica bechina (Nymphalidae: Biblidinae) e sua planta hospedeira Caryocar brasiliense (Caryocaraceae) / Composition and seasonality of fruit-feeding butterflies in the cerrado savanna, with emphasis on the phenological relationship between Eunica bechina (Nymphalidae: Biblidinae) and its host plant Caryocar brasiliense (Caryocaraceae)
In many tropical environments, rainy and dry seasons alternate. The dryer season has decreased leaf availability and the nutritional quality of leaves is also low - thus it is an unfavorable period for herbivorous insects and generates seasonal oscillations in their populations. The cerrado is a neotropical seasonal biome characterized by a hot/rainy and a c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/05/2011
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8. Impact and regeneration mechanism after invasion by Pteridium arachnoideum (Kaulf.) Maxon (Dennstaedtiaceae) in savanna woodland areas, southwestern São Paulo State / Impacto da invasão e mecanismos de regeneração natural do cerradão em áreas ocupadas por Pteridium arachnoideum (kaulf.) Maxon (Dennstaedtiaceae) no sudoeste do Estado de São Paulo
The genus Pteridium comprises bracken species recognized by large fronds and a rhizome system that allows their fast expansion. Bracken presents an elevated biomass production throughout the year, that increases fire occurrence and release chemical compounds that are considered allelopathic. Nowadays, species of the genus Pteridium are well known as problem-
Publicado em: 2010
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9. Ecologia das interações entre Udranomia spitzi (Lepidoptera, Hesperiidae) e formigas tendo como hospedeira Ouratea spectabilis (Ochnaceae) em um cerrado mineiro / Ecology of interactions between Udranomia spitzi (Lepidoptera, Hesperiidae) and ants on Ouratea spectabilis (Ochnaceae) in a savanna from Minas Gerais state, Brazil
Studies in multitrophic systems can serve as tools to investigate the structure and organization of ecological communities. Because it is a biome rich in multitrophic interactions, the Cerrado (tropical savanna) is a good model for the study of insect-plant interactions. Udranomia spitzi (Hesperiidae) is an endemic butterfly from Cerrado. In the immature sta
Publicado em: 2010
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10. A importância da floração seqüencial de Malpighiaceae para a manutenção da diversidade de tripes (Thysasanoptera) no cerrado / The importance of sequential flowering Malpighiaceae to the maintenance of thrips (Thysanoptera) in Brazilian Savanna
To understand the role of each plant species in the ecology of thrips, two principal criteria need to be quantified: the regularity with which individuals are found on a plant species over time, and their abundance on that particular plant species relative to other ones. The choice of representative plants may supply subsidies to define temporary patterns an
Publicado em: 2010
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11. Alteração no uso e cobertura do solo na bacia do médio rio Araguaia, Brasil central / Land use land and cover changes in the middle Araguaia river basin, central Brazil
The central region of the Araguaia river basin encompasses a transition area between the Tropical Rain Forest and the Cerrado in Brazil. Despite of the fact that during the last four decades, this area has undergone an intense deforestation process, the quantification and impact of these changes are still unknown. Thus this study aimed to evaluate the dynami
Publicado em: 2010
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12. Tipologia e fragmentação das terras úmidas do cerrado na alta bacia do Rio Araguaia, estado de Goiás / Typology and fragmentation wetland savanna int he high Araguia River basin, Goiás state
The aim of this research is to call the attention to the humid areas preservation for they are natural habitat with special dynamic and genesis and that they have been damaged by the gradual development of the use of the soil in the latest year. The upper basin of Araguaia river were chosen as an area study to follow systematically the development of Cerrado
Publicado em: 2010