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Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian Semiarid region, for use in Dynamic Global Vegetation Models. Repositório Alice
REZENDE, L. F. C.; ARENQUE-MUSA, B. C.; MOURA, M. S. B. de; AIDAR, S. de T.; RANDOW, C. V.; MENEZES, R. S. C.; OMETTO, J. P.B. H..
The semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face of global changes. In a field work realized in an area of preserved Caatinga forest located in Petrolina, Pernambuco, measurements of carbon assimilation (in response to light and CO2) were performed on 11 individuals of Poincianella microphylla, a native species that is abundant in this region. These data were used to calibrate the maximum carboxylation velocity (Vcmax) used in the INLAND model. The calibration techniques used were Multiple Linear Regression...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Modelos de Vegetação Globais Dinâmicos; Produtividade primária bruta; DGVMs; Vegetação; Caatinga; Mudanças climáticas; Biodiversidade; Dynamic Global Vegetation Models; Natural resource.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1053978
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Evolution and challenges of dynamic global vegetation models for some aspects of plant physiology and elevated atmospheric CO2. Repositório Alice
REZENDE, L. F. C.; ARENQUE, B. C.; AIDAR, S. de T.; MOURA, M. S. B. de; RANDOW, C. V.; TOURIGNY, E.; MENEZES, R. S. C.; OMETTO, J. P. H. B..
Dynamic global vegetation models (DGVMs) simulate surface processes such as the transfer of energy, water, CO2, and momentum between the terrestrial surface and the atmosphere, biogeochemical cycles, carbon assimilation by vegetation, phenology, and land use change in scenarios of varying atmospheric CO2 concentrations. DGVMs increase the complexity and the Earth system representation when they are coupled with atmospheric global circulation models (AGCMs) or climate models. However, plant physiological processes are still a major source of uncertainty in DGVMs. The maximum velocity of carboxylation (Vcmax), for example, has a direct impact over productivity in the models. This parameter is often underestimated or imprecisely defined for the various plant...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: DGVMs; Vegetação; Mudanças climáticas; Global changes; Maximumvelocity of carboxylation; Acclimation.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1053980
Registros recuperados: 2
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