@PhDThesis{Rezende:2015:AnMoEc,
author = "Rezende, Luiz Felipe Campos de",
title = "An{\'a}lise e modelagem de ecofisiologia da esp{\'e}cie
Poincianella microphylla da Caatinga em campo e sob
condi{\c{c}}{\~o}es de alta concentra{\c{c}}{\~a}o de CO2",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2015",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2015-05-11",
keywords = "modelos de vegeta{\c{c}}{\~a}o global din{\^a}mica, velocidade
m{\'a}xima de carboxila{\c{c}}{\~a}o (Vcmax),
minera{\c{c}}{\~a}o de dados, produtividade prim{\'a}ria bruta
(PPB), efici{\^e}ncia do uso da {\'a}gua (EUA), dynamic global
vegetation models, maximum velocity of carboxylation (Vcmax), data
mining, gross primary productivity (GPP), water use efficiency
(WUE).",
abstract = "O bioma Caatinga {\'e} extremamente importante devido {\`a} sua
biodiversidade, seu endemismo e suas dimens{\~o}es (844.453
km\$^{2}\$). Apesar de sua import{\^a}ncia, ainda s{\~a}o
escassas as informa{\c{c}}{\~o}es sobre a fisiologia das
esp{\'e}cies da Caatinga. Medidas de fisiologia vegetal s{\~a}o
cruciais para a calibra{\c{c}}{\~a}o de Modelos de
Vegeta{\c{c}}{\~a}o Global Din{\^a}mica (DGVMs) que s{\~a}o
utilizados para simular as respostas da vegeta{\c{c}}{\~a}o
diante das mudan{\c{c}}as globais. Um dos objetivos deste
trabalho foi calibrar a velocidade m{\'a}xima de
carboxila{\c{c}}{\~a}o (Vc\$_{max}\$) de um DGVM (neste caso,
do modelo INLAND) e desta forma melhorar a
representa{\c{c}}{\~a}o de produtividade e da Efici{\^e}ncia do
Uso da {\'A}gua (EUA) no modelo. Num trabalho de campo realizado
numa {\'a}rea de floresta preservada na Caatinga, localizada em
Petrolina-PE, medidas de assimila{\c{c}}{\~a}o de carbono em
resposta {\`a} luz e {\`a} concentra{\c{c}}{\~a}o de
CO\$_{2}\$ foram realizadas sobre 11 indiv{\'{\i}}duos de
\emph{Poincianella microphylla} (Mart. ex G. Don) L.P. Queiroz,
uma esp{\'e}cie nativa que {\'e} abundante nesta regi{\~a}o.
Estes dados foram utilizados em Regress{\~a}o Linear
M{\'u}ltipla (MLR) e t{\'e}cnicas de minera{\c{c}}{\~a}o de
dados como \emph{Classification And Regression Tree} (CART) e
K-MEANS para se obter uma equa{\c{c}}{\~a}o de ajuste e valores
de m{\'e}dios de Vc\$_{max}\$. Na sequ{\^e}ncia, foi realizada
a simula{\c{c}}{\~a}o de Produtividade Prim{\'a}ria Bruta (PPB)
no INLAND utilizando a equa{\c{c}}{\~a}o obtida na
regress{\~a}o para estimar a Vcmax e os valores m{\'e}dios de
Vc\$_{max}\$ obtidos pelos m{\'e}todos CART, K-MEANS. Os
resultados foram comparados com dados observados de PPB obtidos
com sensores meteorol{\'o}gicos e ambientais instalados numa
torre na mesma {\'a}rea experimental. Verificou-se que a PPB
simulada atingiu 72\% da PPB observada ao se utilizar os valores
de Vcmax calibrada, enquanto que o modelo n{\~a}o calibrado
obteve 42\% da PPB observada. Observou-se tamb{\'e}m que a
simula{\c{c}}{\~a}o da EUA atingiu 92\% da EUA observada. Desta
forma, este trabalho comprova e refor{\c{c}}a a import{\^a}ncia
de utilizar medidas ecofisiol{\'o}gicas obtidas em campo com a
finalidade de calibrar de DGVMs. Diante do aumento da
concentra{\c{c}}{\~a}o de CO\$_{2}\$ na atmosfera num
cen{\'a}rio de mudan{\c{c}}as globais tem se observado e
relatado algumas respostas da vegeta{\c{c}}{\~a}o como o ganho
de biomassa e o aumento da EUA. Com o objetivo de estudar quais
seriam as respostas da vegeta{\c{c}}{\~a}o da Caatinga ao
aumento da concentra{\c{c}}{\~a}o de CO\$_{2}\$ na atmosfera
foi realizado um experimento em laborat{\'o}rio cultivando
pl{\^a}ntulas da esp{\'e}cie: P. \emph{microphylla} em
c{\^a}maras de topo aberto (OTCs) em quatro condi{\c{c}}{\~o}es
diferentes: 1. concentra{\c{c}}{\~a}o de CO\$_{2}\$ numa
atmosfera ambiente (400 ppm) e sob estresse h{\'{\i}}drico; 2.
concentra{\c{c}}{\~a}o de CO\$_{2}\$ numa atmosfera
enriquecida (800 ppm) e sob estresse h{\'{\i}}drico; 3.
concentra{\c{c}}{\~a}o de CO\$_{2}\$ numa atmosfera ambiente
(400 ppm) e as pl{\^a}ntulas submetidas a regas a cada dois dias;
4. concentra{\c{c}}{\~a}o de CO2 numa atmosfera enriquecida (800
ppm) e as pl{\^a}ntulas submetidas a regas a cada dois dias. Os
resultados corroboram diversos relatos registrados na literatura
como o ganho de biomassa e o aumento da EUA para plantas
cultivadas numa elevada concentra{\c{c}}{\~a}o de CO\$_{2}\$.
S{\~a}o respostas conhecidas para a vegeta{\c{c}}{\~a}o de
outros biomas, no entanto ainda eram desconhecidas para
esp{\'e}cies da Caatinga. ABSTRACT: The Caatinga biome is
extremely important because of its biodiversity, its endemism and
its dimensions (844,453 km\$^{2}\$). Despite its importance,
there is little information about the physiology of the species of
the Caatinga. Plant physiology measurements are crucial to the
calibration of Dynamic Global Vegetation Models (DGVMs) that are
used to simulate the responses of vegetation in face of global
changes. One goal of this study was to calibrate the maximum
velocity of carboxylation (Vc\$_{max}\$) of a DGVM (in this
case, the INLAND model) and thus improve the representation of
productivity in the model. In a fieldwork carried out in a
preserved forest area of Caatinga located in Petrolina,
Pernambuco, measurements of carbon assimilation in response to
light and CO\$_{2}\$ concentration were performed on 11
individuals of \emph{Poincianella microphylla} (Mart. Ex G. Don)
LP Queiroz, one native species that is abundant in this region.
These data were used in Multiple Linear Regression (MLR) and data
mining techniques Classification and Regression Tree (CART) and
K-means to obtain a fit equation and Vc\$_{max}\$ average
values. Then, Gross Primary Productivity (GPP) was simulated in
INLAND using the average values of Vc\$_{max}\$ obtained by
CART, K-MEANS methods, or calculated by the regression equation.
The results were compared with observed data of GPP obtained with
meteorological and environmental sensors installed in a tower in
Petrolina. It was found that the simulated GPP reached 72\% of
the observed GPP when using the calibrated values of
Vc\$_{max}\$, while the uncalibrated model obtained 42\% of the
observed GPP. Thus, this work reinforces the importance of using
ecophysiological measurements for calibration of the DGVMs. In
face of increased CO\$_{2}\$ concentrations in the atmosphere in
a scenario of global change some responses of vegetation as
biomass gain and the increase in Water Use Efficiency (WUE) have
been observed and reported. In order to study what is the response
of the vegetation of the Caatinga to increased CO\$_{2}\$
concentration in the atmosphere a laboratory experiment was
conducted cultivating seedlings of the species P.
\emph{microphylla} in open-top chambers (OTCs) in four different
conditions: 1. CO\$_{2}\$ concentration in ambient atmosphere
(400 ppm) and under water stress; 2. CO\$_{2}\$ concentration in
enriched atmosphere (800 ppm) and under water stress; 3.
CO\$_{2}\$ concentration in ambient atmosphere (400 ppm) and
with the seedlings subjected to irrigation every two days; 4.
CO\$_{2}\$ concentration in enriched atmosphere (800 ppm) and
with the seedlings subjected to irrigation every two days. The
results corroborate many reports presented in the literature as
the gain of biomass and increasing of WUE to plants grown in a
high concentration of CO\$_{2}\$. These are known responses for
vegetation from other biomes, however were still unknown to
species of Caatinga.",
committee = "Alval{\'a}, Pl{\'{\i}}nio Carlos (presidente) and Ometto, Jean
Pierre Henry Balbaud (orientador) and Randow, Celso Von
(orientador) and Domingues, Tomas Ferreira and Menezes,
R{\^o}mulo Sim{\~o}es Cezar",
copyholder = "SID/SCD",
englishtitle = "Analysis and modeling of ecophysiology of specie Poincianella
Microphylla from Caatinga realized in field and under conditions
of high CO2 concentration",
language = "pt",
pages = "179",
ibi = "8JMKD3MGP8W/3J3CB32",
url = "http://urlib.net/ibi/8JMKD3MGP8W/3J3CB32",
targetfile = "publicacao.pdf",
urlaccessdate = "27 abr. 2024"
}