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Registros recuperados: 24
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Structural assessment of a population of Anacardium humile subjected to fire during different periods of the year Acta Botanica
Sousa,Diego Guimarães de; Cunha,Hélida Ferreira da.
ABSTRACT Understanding how fire affects the plant biota of the Cerrado is essential for formulating conservational strategies. We evaluated the effects of fires during different periods of the year on the populational structure of Anacardium humile. The research was carried out in areas of typical cerrado stricto sensu in the territory of the Kalunga, state of Goiás, Brazil. These areas, which comprise the same population, were submitted to the following treatments: unburned (control), burned in May 2016 (early fire - EF), and burned in September 2016 (late fire - LF). In July 2018, we delimited two contiguous transects of 100 x 20 m, subdivided into 10 plots of 20 x 20 m, in each area. Fire stimulated the development of branches from basal regrowth in EF...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardiaceae; Burning; Cerrado; Fire; Impact; Regimes.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200401
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Do the structures of macaw palm fruit protect seeds in a fire-prone environment? Acta Botanica
Bicalho,Elisa Monteze; Rosa,Bruno Luan; Souza,Anna Elisa de; Rios,Camilla Oliveira; Pereira,Eduardo Gusmão.
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 determine whether the fruit characteristics of A. aculeata enable seeds to resist the effects of fire and also the consequent effects of fire on fruit biometric traits and embryo viability. After a fire event in a region of pasture-forest transition, we marked 30 individuals of A. aculeata. The trees were separated by UPGMA analysis into 5 groups according to fire exposure, ranging from trees with no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acrocomia aculeata; Biometry; Burning; Climate change; Seed viability.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400540
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Post-fire regeneration of vegetation on sandy oligotrophic soil, in Itabaiana, Sergipe, Brazil Biological Sciences
Dantas, Túlio Vinicius Paes; Ribeiro, Adauto de Souza; Sampaio, Everardo Valadares de Sá Barretto; Araújo, Elcida de Lima.
Two models of post-disturbance regeneration of vegetation in areas of oligotrophic soils have been proposed for temperate regions. The first model is characterized by rapid recovery of the floristic composition, due to the fire resistance of plants; while in the second model, the fire causes extensive mortality and the recovery occurs by recruitment from the seed bank. Since these models have been rarely tested in tropical oligotrophic environments, we applied them in the analysis of floristic compositions in three areas with different post-fire regeneration times in Sergipe State, Brazil. The regeneration followed the seed bank recruitment model in places of bare ground, with a progressive increase in plant density and changes in the relative abundance...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Succession; Disturbance; Burning; Resilience; Models.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27587
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Trends and gaps of the scientific literature about the effects of fire on Brazilian Cerrado Biota Neotropica
Arruda,Filipe Viegas de; Sousa,Diego Guimarães de; Teresa,Fabrício Barreto; Prado,Vitor Hugo Mendonça do; Cunha,Hélida Ferreira da; Izzo,Thiago Junqueira.
Abstract Fire management is an important issue in the Brazilian Cerrado, since both anthropogenic high intensity fires and complete fire suppression can reduce the biodiversity in this biome. In this paper, we highlight the trends in scientific literature about fire effects in the Cerrado, aiming to detect possible gaps and to indicate directions of future scientific research. We searched for articles in the periodic database Web of Knowledge from 1991 to 2016, and observed an increase in the number of publications throughout the years. Most articles were associated with Brazilian institutions (58%), followed by those with collaboration between Brazilian and international institutions (33%), and those published by authors exclusively from international...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Burning; Scientometrics; Biodiversity Hotspots; Savanna; Perturbation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100211
Registros recuperados: 24
Primeira ... 12 ... Última
 

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