Ecologia do fogo e o impacto na vegetação da Amazônia

Marcus Vinicius Athaydes Liesenfeld, Gil Vieira, Ires Paula de Andrade Miranda

Resumo


O objetivo desta revisão é apontar alguns campos de investigação atuais em ecologia do fogo e os impactos do fogo na vegetação da Amazônia. A ocorrência de incêndios na Amazônia úmida parecia uma contradição até bem pouco tempo. O fogo é independente da existência de humanos e o mesmo sempre atuou na estruturação da vegetação. Entretanto hoje, com as anomalias e as mudanças climáticas globais, os regimes de fogo têm se alterado em todo o mundo e também na Amazônia. O fogo impacta de forma diferente, dependendo da região amazônica em que ocorre, e isso pode estar relacionado ao solo, bem como à morfologia e idade das plantas. Muitas espécies podem responder de forma positiva, possuindo mecanismos de sobrevivência ou rebrote pós-fogo. É necessária uma melhor compreensão de como as plantas da Amazônia respondem ao impacto do fogo, no sentido de entender o quanto a floresta tropical Amazônica ainda é de fato imune aos incêndios, e de que modo o fogo poderia contribuir com a chamada “savanização” da Amazônia.


Palavras-chave


Incêndio florestal; Regeneração da floresta; Impacto ambiental

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DOI: https://doi.org/10.4336/2016.pfb.36.88.1222



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