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Estudo sobre as características de povoamentos de Pinus pinaster, em três baldios do distrito de Viseu, após a ocorrência de agentes de distúrbio
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| 3.59 MB | Adobe PDF |
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Abstract(s)
O pinheiro-bravo é a espécie resinosa mais abundante em Portugal, tendo um papel importante a nível socioeconómico, bem como as suas características ecológicas foram decisivas para a história da paisagem portuguesa, mas com a recorrência de incêndios, sensibilidade às pragas e doenças e múltiplas atividades florestais praticadas nesta espécie, faz com que estes povoamentos venham a diminuir. Este trabalho pretende avaliar a perdas de volume que os povoamentos de pinheiro-bravo podem sofrer, devido à presença de pragas e doenças que levam ao corte sanitário e as atividades florestais, nomeadamente a resinagem.Este estudo realizou-se em três baldios, nomeadamente o baldio do Cercal localizado em Oliveira de Frades, o baldio de Igarei localizado em Vouzela e o baldio de Várzea de Calde localizado em Viseu, cujo povoamento principal é de pinheiro-bravo. Nestas áreas de estudo foi realizado o inventário florestal, dando um total de 27 parcelas inventariadas. Para visualizar as perdas de volume nos povoamentos de pinheiro-bravo recorreu-se aos dados do 6º Inventário Florestal Nacional, como dados de referência, onde foram retirados os dados cujo códigos eram referentes ao estado sanitário e feridas de resinagem.Com os dados de referência e os dados das áreas de estudo analisados foi realizada uma comparação entre eles para verificar as perdas de volume, biomassa e carbono e a maneira a quantificar como as pragas e doenças e a atividade de resinagem, podem induzir essas perdas em volume nos povoamentos de pinheiro-bravo
Pinus pinaster is the most abundant resinous species in Portugal, playing an important role at a socioeconomic level, as well as its ecological characteristics were decisive for the history of the Portuguese landscape, but with the recurrence of fires, sensitivity to pests and diseases and multiple forestry activities practiced in this species, causes these stands to decrease. This work intends to evaluate the volume losses that pinus pinaster stands can suffer, due to the presence of pests and diseases that lead to sanitary cutting and forestry activities, namely resining.This study was carried out in three common areas, namely the Cercal common located in Oliveira de Frades, the Igarei common located in Vouzela and the Várzea de Calde common located in Viseu, whose main population is pinus pinaster. In these study areas, a forest inventory was carried out, giving a total of 27 plots inventoried.To visualize volume losses in pinus pinaster stands, data from the 6th National Forest Inventory were used as reference data, from which data whose codes referred to health status and resin wounds were removed.With the reference data and data from the analyzed study areas, a comparison was made between them to verify the volume, biomass and carbon losses and the way to quantify how pests and diseases and the resin-making activity can induce these losses in volume in pinus pinaster stands.
Pinus pinaster is the most abundant resinous species in Portugal, playing an important role at a socioeconomic level, as well as its ecological characteristics were decisive for the history of the Portuguese landscape, but with the recurrence of fires, sensitivity to pests and diseases and multiple forestry activities practiced in this species, causes these stands to decrease. This work intends to evaluate the volume losses that pinus pinaster stands can suffer, due to the presence of pests and diseases that lead to sanitary cutting and forestry activities, namely resining.This study was carried out in three common areas, namely the Cercal common located in Oliveira de Frades, the Igarei common located in Vouzela and the Várzea de Calde common located in Viseu, whose main population is pinus pinaster. In these study areas, a forest inventory was carried out, giving a total of 27 plots inventoried.To visualize volume losses in pinus pinaster stands, data from the 6th National Forest Inventory were used as reference data, from which data whose codes referred to health status and resin wounds were removed.With the reference data and data from the analyzed study areas, a comparison was made between them to verify the volume, biomass and carbon losses and the way to quantify how pests and diseases and the resin-making activity can induce these losses in volume in pinus pinaster stands.
Description
Keywords
Pinheiro-bravo Inventário florestal Pragas e doenças Resinagem Captura de carbono