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Estimation of productivity in pine and oak forests in northern Portugal using Biome-BGC
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Orientador(es)
Resumo(s)
Studies about the productivity of forest ecosystems help to quantify sequestered carbon and provide data that are
used in forest management. Forests in northern Portugal are an important economic resource, but their productivity
in scenarios of future climate change is not yetwell understood. The objectives of this study were to evaluate
and compare simulated net primary production (NPP) andNPPbased onmeasured data of twotree species located
in the Vila Real district forests, pine (Pinus pinaster Aiton) and oak (Quercus pyrenaica Willd.) and assess their simulatedNPPin
diverse climate conditions, including future climate scenariosandincreasing atmospheric CO2 concentrations.
An ecosystem process model, Biome-BGC, which simulates carbon, nitrogen and water cycles of forest
ecosystems close to equilibrium conditions, was used to examine the importance of site and ecophysiological
factors on the productivity of these forests. Climate change scenarios and increased CO2 concentrations were
tested to explore potential responses of the studied species. The model provided good estimates of NPP. There
was a strong correlation between the simulated and measured NPP values in the pine (15) and oak (15) stands.
The NPP of these forests are predicted to increase in the future with a CO2 increase whereas in a climate with
higher temperature and lower soil moisture, the NPP will decrease. These results confirm that precipitation is a
very important climate variable to growth and productivity in the Mediterranean forest ecosystems. This study
also demonstrated the ability of Biome-BGC to accurately simulate forest ecosystems behaviour and encourages
the application of model simulations in Portugal
Descrição
Palavras-chave
forest productivity Biome-BGC Portugal
Contexto Educativo
Citação
Forestry 2015; 88, 200–212
Editora
Institute of Chartered Foresters