Factors affecting post-fire crown regeneration in cork oak (Quercus suber L.) trees |
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| Authors: | Filipe Xavier Catry Francisco Moreira Inês Duarte Vanda Acácio |
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| Institution: | (1) Centro de Ecologia Aplicada “Prof. Baeta Neves”, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal |
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| Abstract: | Cork oak (Quercus suber) forests are acknowledged for their biodiversity and economic (mainly cork production) values. Wildfires are one of the main
threats contributing to cork oak decline in the Mediterranean Basin, and one major question that managers face after fire
in cork oak stands is whether the burned trees should be coppiced or not. This decision can be based on the degree of expected
crown regeneration assessed immediately after fire. In this study we carried out a post-fire assessment of the degree of crown
recovery in 858 trees being exploited for cork production in southern Portugal, 1.5 years after a wildfire. Using logistic
regression, we modelled good or poor crown recovery probability as a function of tree and stand variables. The main variables
influencing the likelihood of good or poor crown regeneration were bark thickness, charring height, aspect and tree diameter.
We also developed management models, including simpler but easier to measure variables, which had a lower predictive power
but can be used to help managers to identify, immediately after fire, trees that will likely show good crown regeneration,
and trees that will likely die or show poor regeneration (and thus, potential candidates for trunk coppicing). |
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| Keywords: | Cork oak Wildfires Crown regeneration Forest management |
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