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Doctoral thesis . 2012
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Modelo para a predição de indicadores de gestão florestal sustentável em povoamentos de pinheiro bravo em Portugal

A model to predict indicators of sustainable forest management in maritime pine stands from Portugal
Authors: Nunes, Luís Filipe de Sousa Teixeira;

Modelo para a predição de indicadores de gestão florestal sustentável em povoamentos de pinheiro bravo em Portugal

Abstract

The main objective of this dissertation was to develop a model to predict indicators of sustainable forest management in maritime pine (Pinus pinaster, Ait.) stands from Portugal. With this aim, a set of sub-models were developed, beginning by a system of equations for compatible prediction of total and merchantable volume, allowing for different definitions of tree volume. Data from stem analysis was used for model development. A dynamic model for dominant height growth was developed using also stem analysis data and applying the generalized algebraic difference approach (GADA). An annual individual tree growth and survival model was developed, using data from thinning experiments and containing irregularly time spaced measurements. The biomass and carbon stocks in the forest floor, understory, down deadwood and mineral soil were assessed in even-aged stands of maritime pine. The collected data was joined to other existing data in order to develop a set of equations to predict carbon stocks in the forest floor, understory, deadwood, and mineral soil, using stand, climate and soil variables-----------------------------------------O objectivo principal desta dissertação foi o desenvolvimento de um modelo para a predição de indicadores de gestão florestal sustentável em povoamentos de pinheiro bravo (Pinus pinaster, Ait.) em Portugal. Neste sentido desenvolveu-se um conjunto de sub-modelos, tendo-se iniciado por um sistema de equações para predição compatível de volume total e mercantil adequado a diferentes definições de volume, usando dados de análise de tronco. Também com base em dados de análise de tronco, foi desenvolvido um modelo dinâmico para o crescimento dos povoamentos em altura dominante, aplicando a metodologia das equações às diferenças algébricas generalizadas (GADA). Recorrendo a dados contendo medições irregularmente espaçadas no tempo, efectuadas em ensaios de desbastes, foi desenvolvido um modelo de previsão anual da probabilidade de sobrevivência e do crescimento da árvore individual em diâmetro e altura. Avaliou-se também a biomassa e stocks de carbono ao nível da folhada, vegetação no sub-coberto, madeira morta e no solo mineral, em povoamentos regulares de pinheiro bravo. Os dados recolhidos foram juntos a dados já existentes para desenvolver um conjunto de equações para a previsão de stocks de carbono na folhada, vegetação no sub-coberto, madeira morta e no solo mineral, usando variáveis do povoamento, do clima e do solo.

Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia

Country
Portugal
Keywords

carbon stocks, dominant height, GADA, biomass, Pinus pinaster, sustainable forest management

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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