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International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire
RESEARCH ARTICLE

Tree height is more important than bark thickness, leaf habit or habitat preference to survive fire in the cerrado of south-east Brazil

Dario Rodriguez-Cubillo A D , Natashi A. L. Pilon B and Giselda Durigan B C
+ Author Affiliations
- Author Affiliations

A School of Natural Sciences, University of Tasmania, Private Bag 55, Hobart, Tas. 7001, Australia.

B Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-865, Campinas, São Paulo, Brazil.

C Laboratório de Ecologia e Hidrologia Florestal, Floresta Estadual de Assis, Instituto de Pesquisas Ambientais, Caixa Postal 104, 19807-300, Assis, São Paulo, Brazil.

D Corresponding author. Email: dario.rodriguez@utas.edu.au

International Journal of Wildland Fire 30(11) 899-910 https://doi.org/10.1071/WF21091
Submitted: 25 June 2021  Accepted: 13 August 2021   Published: 8 September 2021

Abstract

Although cerrado trees have evolved with fire for millions of years, it is not well-understood which tree attributes are more important to survive fire in the Brazilian savanna. To address this issue, we used pre- and post-fire data on 367 cerrado trees (113 native species) planted in an arboretum in south-east Brazil and then left unburnt until 2019, when a prescribed burn was applied. Tree size (height and diameter) had been measured in 2017. Four months after the fire, we assessed tree size, relative bark thickness (bark-to-diameter ratio), leaf habit (evergreen or deciduous) and habitat preference (savanna specialist or generalist). These were the predictor variables used in generalised linear models exploring tree survival and resprouting type. Most trees survived fire: 59% resprouted epicormically, 25% resprouted basally, 6% had root suckers, and only four trees died. Basal and epicormic resprouting were related to tree size: small trees (diameter ≤ 5 cm) resprouted basally more frequently, whereas tall trees (height ≥ 3.7 m) resprouted epicormically more frequently. Our results suggest that rapid growth is more important than bark thickness, leaf habit or habitat preference to escape the fire trap, because it allows cerrado trees to reach a fire-resistant height more quickly.

Keywords: bark thickness, cerrado, fire trap, rapid growth, resprouting, top-kill, tree height, stem diameter.


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Resprouting and mortality of juvenile eucalypts in an Australian savanna: impacts of fire season and annual sorghum.Crossref | GoogleScholarGoogle Scholar |

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