Data/hora: 06/06/2024 11:02:20

Biblioteca(s): | Embrapa Semiárido.
Data corrente: | 03/10/2016
Data da última atualização: | 23/01/2017
Autoria: | 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.
Afiliação: | L. F. C. REZENDE, INPE; B. C. ARENQUE, USP; SAULO DE TARSO AIDAR, CPATSA; MAGNA SOELMA BESERRA DE MOURA, CPATSA; C. VON RANDOW, INPE; E. TOURIGNY, INPE; R. S. C. MENEZES, UFPE; J. P. H. B. OMETTO, INPE.
Título: | Is the maximum velocity of carboxylation (Vcmax) well adjusted for deciduous shrubs in DGVMs: a case study for the Caatinga Biome in Brazil.
Ano de publicação: | 2016
Fonte/Imprenta: | Modeling Earth Systems and Environment, v. 2, p. 42-47, 2016.
DOI: | 10.1007/s40808-016-0099-5
Idioma: | Inglês
Conteúdo: | Vcmax is the rate of maximum velocity of carboxylation of plants and is considered one of the most critical parameters for changes in vegetation in face of global changes and it has a direct impact on gross primary productivity. Physiological processes are considered the main sources of uncertainties in dynamic global vegetation models (DGVMs). The Caatinga biome, in the semiarid region of northeastern Brazil, is extremely important due to its biodiversity and endemism. In a field work realized in an area of preserved Caatinga forest, measurements of carbon assimilation (in response to light and CO2) were performed on 11 individuals of a native species. These results of Vcmax measurements in Caatinga were compared with parameterization of models, revealing that Vcmax is not well adjusted in several DGVMs. Also, the values obtained in the Caatinga field experiments were very close to empirical values obtained in the Northern hemisphere (Austria). These ecophysiological measurements can contribute in understanding of this biome
Palavras-Chave: | Bioma Caatinga; Dynamic global vegetation models; Plant functional types; Planta nativa.
Thesagro: | Caatinga; Recurso natural; Vegetação.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/148181/1/Magna-2.pdf
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (55996-1) - UPC - AP - DD -  -  -  - DIS