Vegetation Fire
Mostrando 13-24 de 50 artigos, teses e dissertações.
-
13. Do the structures of macaw palm fruit protect seeds in a fire-prone environment?
ABSTRACT Fire is an abiotic disturbance that regulates vegetation structure and biodiversity. Some plant species have adapted to fire prone environments by evolving protective structures. Acrocomia aculeata (macaw palm) is widely distributed throughout tropical America, and is found in environments continuously influenced by anthropogenic fire. We aimed to d
Acta Bot. Bras.. Publicado em: 27/10/2016
-
14. Phosphorus Forms in Ultisol Submitted to Burning and Trituration of Vegetation in Eastern Amazon
ABSTRACT The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an
Rev. Bras. Ciênc. Solo. Publicado em: 26/04/2016
-
15. Disturbance as a factor in breaking dormancy and enhancing invasiveness of African grasses in a Neotropical Savanna
The Cerrado is threatened by wildfires and invasive species. We aimed to evaluate in laboratory conditions whether temperature fluctuation at the soil surface, resulting from the absence of vegetation due to fire, can affect the germination of Urochloa decumbens and U. brizantha, two invasive African grasses. Seeds of both species were submitted to simulatio
Acta Bot. Bras.. Publicado em: 2016-03
-
16. Post-fire dynamics of the woody vegetation of a savanna forest (Cerradão) in the Cerrado-Amazon transition zone
ABSTRACTFire can change the species composition, diversity, and structure of savanna vegetation, thus altering growth and mortality rates. Such changes in the woody vegetation of burned savanna forest were evaluated over four years in comparison to unburned savanna forest. All woody plants with a diameter at breast height > 10 cm were measured in 100 permane
Acta Bot. Bras.. Publicado em: 2015-09
-
17. Woody vegetation dynamics in a floodplain campo de murundus in central Brazil
Campos de murundus (grasslands dotted with knolls that are covered with savanna-like woody vegetation) are a common landscape in central Brazil. In this study, we assessed for the first time the dynamics of the vegetation in a floodplain campo de murundus, describing changes in composition and structure of the woody vegetation. In 2005, we established 16 per
Acta Bot. Bras.. Publicado em: 2014-12
-
18. Impact of invasion by molasses grass (Melinis minutifloraP. Beauv.) on native species and on fires in areas of campo-cerrado in Brazil
In the Cerrado Biome of Brazil, African grasses constitute a serious problem, occurring in virtually all protected areas. Molasses grass (Melinis minutiflora P. Beauv.) accumulates more biomass than do most other species of the herbaceous stratum vegetation native to the Cerrado. In this study, our aim was to determine the impact of M. minutiflora on native
Acta Bot. Bras.. Publicado em: 2014-12
-
19. Mortality, recruitment and growth of the tree communities in three forest formations at the Panga Ecological Station over ten years (1997-2007)
The area evaluated in this study was a continuous stretch comprising three vegetation formations: gallery forest, semideciduous seasonal forest and cerradão (woodland savanna). The aim of this study was to examine the tree community dynamics in a forest gradient-from gallery forest to cerradão-at Panga Ecological Station, in the city of Uberlandia, located
Acta Bot. Bras.. Publicado em: 2014-06
-
20. Estratégias reprodutivas de Leiothrix vivipara (Bong.) Ruhl (Eriocaulaceae) na Serra do Cipó
Pseudovivipary is a kind of vegetative reproduction characterized by the development of plantlets on reproductive structures. This form of reproduction occurs in plants living in terrestrial environments with high seasonality such as the Arctic, highlands, or deserts. Leiothrix vivipara (Eriocaulaceae), an endemic species from the campos rupestres vegetation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
-
21. Reconocimiento de diásporas de Malveae (Malvaceae) en muestras de suelos de zonas serranas (Sierras Chicas, Córdoba, Argentina) afectadas por incendios
As part of a study of post-fire regeneration of native vegetation in montane areas near Falda del Carmen (Sierras Chicas, Córdoba, Argentina), we analyzed the aerial seed bank to help identify the species present in soil samples. Among families with greater diversity and abundance in the study area, the Malvaceae are represented by 14 species belonging to t
Rodriguésia. Publicado em: 2012-09
-
22. Dinâmica e composição da avifauna do sub-bosque sob influência de diferentes históricos de queimada em uma savana Amazônica / Bird dynamics and composition under different fire regimes in an Amazonian Savanna
Savannas are ecosystems maintained by fires, characterized by a fire-adapted biota. Different fire regimes can generate structurally diverse vegetation, and savanna birds are known to be closely related to vegetation structure. However, long-term approaches and interaction of fire with other environmental factors need to be explored for the better understand
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2011
-
23. Incêndios rasteiros em florestas sazonalmente alagáveis por água preta na Amazônia: carga de combustível e recuperação lenta / Fire in amazonian seasonally waterlogged blackwater forests: fuel loads and slow post-fire recovery
O fogo é um dos principais instrumentos de desmatamento na Amazônia. No entanto, apesar de sofrerem pouca pressão antrópica, as florestas de igapó e campinarana, ambas sazonalmente alagáveis pelas águas pretas e ácidas do Rio Negro e tributários, são altamente inflamáveis na estação seca. Em de imagens de satélite e observações em campo, essa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/01/2011
-
24. Mapeamento do risco de incêndio na bacia do Alto Paraguai utilizando dados AVHRR-NOAA.
As queimadas no Brasil são de complexo entendimento, pois possuem relação com a dinâmica climática, raízes culturais, condicionantes econômicos e fenômenos ecológicos. Na Bacia do Alto Paraguai, o fogo é muito utilizado para manejo de pastagens, principalmente durante a estação seca. A determinação do risco de incêndio em áreas de vegetação
SIMPÓSIO DE GEOTECNOLOGIAS NO PANTANAL. Publicado em: 2011