Efeito do fogo na produção de frutos de Qualea parviflora Mart. (Vochysiaceae) em cerrado sensu stricto

RESUMO – Entre os muitos efeitos causados por queimadas nas especies arboreas nativas do Cerrado, a alteracao da producao de frutos tem destaque, pois implica diretamente na manutencao de populacoes locais. O objetivo deste trabalho foi investigar o efeito de uma queimada prescrita na producao de frutos de Qualea parviflora Mart. em area de Cerrado sensu stricto em Brasilia, DF. Foram utilizadas duas areas de Cerrado sensu stricto, uma submetida a regime de queima bienal em agosto (queimada) e outra protegida contra a queima ha 14 anos (controle). Em cada area, 10 individuos reprodutivos foram selecionados e a sua producao de botoes florais, flores e frutos, acompanhada durante 22 meses. Dois meses apos uma queimada prescrita em 26 de agosto de 2008, a producao de estruturas reprodutivas foi maior na area queimada do que na area-controle. Contudo, a proporcao de botoes que geram flores e frutos (“fruit set”) foi a mesma nas duas areas. Na estacao reprodutiva seguinte, um ano apos a queima nao houve producao de inflorescencias na area queimada. No entanto, na area-controle a producao de frutos foi maior do que no periodo anterior. A ausencia de producao de flores nos individuos da area queimada um ano apos o fogo sugere que Q. parviflora pode necessitar de mais de um ano para retornar ao seu ciclo normal de reproducao, indicando que os efeitos de medio e de longo prazo devem ser considerados ao se usar o fogo como instrumento de manejo para reducao do combustivel em areas de Cerrado.

• Publication year

  2012

• Venue

  Revista Arvore

• Publication date

  2012-08-01

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1590/S0100-67622012000400010
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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