Flooded Forest
Mostrando 13-24 de 61 artigos, teses e dissertações.
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13. Alkaloids and biological activity of beribá (Annona hypoglauca)
ABSTRACT Annona hypoglauca Mart., Annonaceae, popularly known as “beribá”, was collected in flooded areas of the Amazonian Rain Forest. The crude extract obtained from this species was found to be cytotoxic against human cancer cells. Chemical information on A. hypoglauca is scarce. So, the present work aimed the isolation and identification of its alka
Rev. bras. farmacogn.. Publicado em: 2017-02
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14. Heterogeneity of bird communities in a mosaic of habitats on a restinga ecosystem in southeast Brazil
ABSTRACT Restinga occurs as a narrow band of coastal habitats throughout the Atlantic Forest, although it presents considerable variation in vegetation structure, which likely contributes to heterogeneity in species inhabiting this endangered ecosystem. The goal of this study is to examine how variation in vegetation and abiotic conditions in the restinga ec
Zoologia (Curitiba). Publicado em: 03/10/2016
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15. Isotopic variation among Amazonian floodplain woody plants and implications for food-web research
Isotopic variation within food sources adds uncertainty to models intended to reconstruct trophic pathways. Understanding this variation is pivotal for planning sampling protocols for food-web research. This study investigates natural variation in C and N stable isotopes among plant species in two western Amazon flooded forests with contrasting watershed bio
Biota Neotrop.. Publicado em: 14/06/2016
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16. Seasonality of reproduction of epiphytic bryophytes in flooded forests from the Caxiuanã National Forest, Eastern Amazon
Este trabalho teve como objetivo conhecer a biologia reprodutiva da brioflora epífita de forófitos de Virola surinamensis (Rol. ex. Rottb.) Warb. na várzea e igapó na Floresta Nacional de Caxiuanã, para responder à seguinte pergunta: O período de reprodução das espé cies de briófitas é influenciado pelo ambiente devido a sazonalidade climática p
An. Acad. Bras. Ciênc.. Publicado em: 13/05/2016
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17. New classification of natural breeding habitats for Neotropical anophelines in the Yanomami Indian Reserve, Amazon Region, Brazil and a new larval sampling methodology
Here we present the first in a series of articles about the ecology of immature stages of anophelines in the Brazilian Yanomami area. We propose a new larval habitat classification and a new larval sampling methodology. We also report some preliminary results illustrating the applicability of the methodology based on data collected in the Brazilian Amazon ra
Mem. Inst. Oswaldo Cruz. Publicado em: 2015-09
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18. Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05
This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years B
Acta Bot. Bras.. Publicado em: 2015-06
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19. Late Quaternary vegetation dynamics from central parts of the Madeira River in Brazil
The present study reconstructs the paleovegetation of a varzea (seasonally flooded) forest in the central parts of the Madeira River floodplain in Brazil using palynological data. Forty-nine cut-bank sediment samples from the Madeira River were processed in the study; from these, ten samples contained pollen: two contained pollen from the Middle Pleniglacial
Acta Bot. Bras.. Publicado em: 2015-03
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20. Structure and diversity of restingas along a flood gradient in southeastern Brazil
This study aimed to relate changes in structure and species diversity with edaphic variables (soil type and flooding regime) in a gradient of forest formations within the Brazilian restingas (coastal woodlands). The study was carried out in the Jacarenema Municipal Natural Park, in the city of Vila Velha, in the Espírito Santo State, Brazil. We evaluated th
Acta Bot. Bras.. Publicado em: 2013-12
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21. Structure and phytogeographic relationships of swamp forests of Southeast Brazil
Swamp forests are associated with soils that are saturated or inundated because of a high water table. In Brazil, little is known about the plant ecology of such forests. In this paper, we aimed to describe the phytosociological structure of the tree layer of swamp forests in Restinga de Jurubatiba National Park, in the northern part of the state of Rio de J
Acta Bot. Bras.. Publicado em: 2013-12
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22. Estoque de combustível fino e decomposição de folhas em florestas de igapó do rio Negro / Fine fuel load and leaf decomposition in Rio Negro floodplain forests
In years of low rainfall, fires have occurred in Amazonian black-water floodplain forests, including the Middle Rio Negro. The fires are documented from satellite images. Forest fires require ignition sources, fuel and dry weather. To understand the susceptibility of these forests to fire we investigated the stock of fine fuel on the ground at 29 sites in bl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/10/2012
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23. Environmental effects on the nest abundances and biomasses of three nest-building termite species (Insecta: Isoptera) in a non-flooded forest in Central Amazonia / Efeitos ambientais sobre as abundâncias e biomassas de três espécies de cupins construtores (Insecta: Isoptera) em uma floresta de terra firme na Amazônia Central
A teoria ecológica sugere que a resposta biológica à variação ambiental está frequentemente sujeita à interação entre fatores limitantes, mas as implicações metodológicas disto para o estudo da distribuição das espécies são controversas. Este trabalho usa padrões de variação espacial das abundâncias de uma espécie de palmeira (Arecaceae)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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24. O efeito do solo, inundação e topografia sobre as campinaranas inundáveis na Amazônia
Little is known about the factors that determine the spatial variation in structure, floristic composition and diversity in the Amazon Campinaranas. The Campinaranas are characterized by predominantly oligotrophic sandy soils. In the Negro River basin, they occur in a mosaic of grassland formations, forest and savanna, often associated with flooding. To infe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011