@Article{RezendeArMoAiVoMeOm:2016:CaMaCa,
author = "Rezende, Luiz Felipe Campos de and Arenque-Musa, B. C. and Moura,
M. S. B. and Aidar, S. T. and Von Randow, Celso and Menezes, R. S.
C. and Ometto, Jean Pierre Henry Balbaud",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade de S{\~a}o Paulo (USP)} and {Empresa Brasileira de
Pesquisa Agropecu{\'a}ria (EMBRAPA)} and {Empresa Brasileira de
Pesquisa Agropecu{\'a}ria (EMBRAPA)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal de
Pernambuco (UFPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "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",
journal = "Brazilian Journal of Biology",
year = "2016",
volume = "76",
number = "2",
pages = "341--351",
month = "Apr./June",
keywords = "Caatinga, Dynamic Global Vegetation Models (DGVM), Global changes,
Gross Primary Productivity (GPP), Maximum carboxylation velocity
(Vcmax).",
abstract = "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
(MLR), and data mining techniques as the Classification And
Regression Tree (CART) and K-MEANS. The results were compared to
the UNCALIBRATED model. It was found that simulated Gross Primary
Productivity (GPP) reached 72% of observed GPP when using the
calibrated Vcmax values, whereas the UNCALIBRATED approach
accounted for 42% of observed GPP. Thus, this work shows the
benefits of calibrating DGVMs using field ecophysiological
measurements, especially in areas where field data is scarce or
non-existent, such as in the Caatinga.",
doi = "10.1590/1519-6984.14414",
url = "http://dx.doi.org/10.1590/1519-6984.14414",
issn = "1519-6984",
language = "en",
urlaccessdate = "02 maio 2024"
}