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A three-step approach to post-fire mortality modelling in maritime pine (Pinus pinaster Ait.) stands for enhanced forest planning in Portugal
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Orientador(es)
Resumo(s)
Maritime pine (Pinus pinaster Ait) is a very important timber-producing species in Portugal with a yield of ~67.1 million
m3 year21. It covers ~22.6 per cent of the forest area (710.6 × 103 ha). Fire is the most significant threat to maritime
pine plantations. This paper discusses research aiming at the development of post-fire mortality models for P. pinaster
Ait stands in Portugal that can be used for enhanced integration of forest and fire management planning activities.
Post-fire mortality was modelled using biometric and fire data from 2005/2006 National Forest Inventory plots and
other sample plots within 2006–2008 fire perimeters. A three-step modelling strategy based on logistic regression
methods was used. Firstly, the probability of mortality to occur after a wildfire in a stand is predicted and secondly, the
degree of mortality caused by a wildfire on stands where mortality occurs is quantified. Thirdly, mortality is distributed
among trees. The models are based on easily measurable tree characteristics so that forest managers may predict
post-fire mortality based on forest structure. The models show that relative mortality decreases when average d.b.h.
increases, while slope and tree size diversity increase the mortality
Descrição
Palavras-chave
Pinus pinaster post-fire mortality forest planning Portugal
Contexto Educativo
Citação
Forestry, Vol. 84, No. 2, 2011, p. 197
Editora
Institute of Chartered Foresters