@PhDThesis{Corsini:2018:AnMuMu,
author = "Corsini, Christianne Riquetti",
title = "An{\'a}lise multitemporal das mudan{\c{c}}as de biomassa da
vegeta{\c{c}}{\~a}o secund{\'a}ria na Amaz{\^o}nia
brasileira",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2018",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2018-05-24",
keywords = "biomassa, trajet{\'o}rias, Amazonia, radar, TerraClass,
emiss{\~o}es, biomass, trajectories, Amazon, emissions.",
abstract = "A regenera{\c{c}}{\~a}o da vegeta{\c{c}}{\~a}o secund{\'a}ria
em {\'a}reas desmatadas na Amaz{\^o}nia brasileira desempenha um
papel importante no balan{\c{c}}o de emiss{\~o}es, funcionando
como um sumidouro din{\^a}mico de carbono, e mitigando os
impactos do desmatamento. O potencial para tal, entretanto,
depende das taxas de crescimento desta vegeta{\c{c}}{\~a}o no
tempo, que v{\~a}o refletir nos estoques de biomassa acumulado.
Como esses estoques variam em rela{\c{c}}{\~a}o aos
est{\'a}gios de regenera{\c{c}}{\~a}o e como a din{\^a}mica da
vegeta{\c{c}}{\~a}o influencia nos padr{\~o}es de cresciment,
ainda {\'e} pouco compreendida. Para entender os padr{\~o}es de
acumulo de biomassa na vegeta{\c{c}}{\~a}o secund{\'a}ria nos
diferentes est{\'a}gios de regenera{\c{c}}{\~a}o, foram
utilizadas trajet{\'o}rias de cobertura da terra com base nas
classes pasto sujo, regenera{\c{c}}{\~a}o com pasto e
vegeta{\c{c}}{\~a}o secund{\'a}ria do sistema TerraClass e
mapas multi-temporais de biomassa acima do solo (BAS) estimados a
partir de dados de RADAR do PALSAR-ALOS. A partir destas
informa{\c{c}}{\~o}es, foi quantificado o crescimento da
vegeta{\c{c}}{\~a}o secund{\'a}ria em diferentes est{\'a}gios
de regenera{\c{c}}{\~a}o na Amaz{\^o}nia brasileira para os
anos de 2007, 2008, 2009 e 2010. Como o crescimento da
vegeta{\c{c}}{\~a}o secund{\'a}ria {\'e} influenciada pelas
condi{\c{c}}{\~o}es ambientais, tamb{\'e}m foi testado como os
estoques de biomassa variaram em fun{\c{c}}{\~a}o de diferentes
intensidades de m{\'a}ximo d{\'e}ficit h{\'{\i}}drico
acumulado (MCWD) e com ocorr{\^e}ncia de fogo. Os resultados
mostraram que a combina{\c{c}}{\~a}o do modelo de
trajet{\'o}rias de classes de cobertura da terra com os mapas de
biomassa foi consistente, uma vez que o padr{\~a}o de BAS foi
crescente da trajet{\'o}ria representaviva do in{\'{\i}}cio da
regenera{\c{c}}{\~a}o (Tr1) at{\'e} a trajet{\'o}ria de
regenera{\c{c}}{\~a}o mais avan{\c{c}}ada (Tr7). A an{\'a}lise
das mudan{\c{c}}as inter-anuais de BAS dentro de cada
trajet{\'o}ria mostrou o incremento anual potencial no processo
de regenera{\c{c}}{\~a}o do pasto sujo at{\'e} a
regenera{\c{c}}{\~a}o com pasto, ao passo que as
trajet{\'o}rias envolvendo a classe vegeta{\c{c}}{\~a}o
secund{\'a}ria apresentaram redu{\c{c}}{\~a}o de biomassa em
algum dos per{\'{\i}}odos analisados. A
estratifica{\c{c}}{\~a}o da BAS nessas trajet{\'o}rias em
fun{\c{c}}{\~a}o dos n{\'{\i}}veis de MCWD e ocorr{\^e}ncia
de fogo revelou a magnitude do impacto deles sobre o ac{\'u}mulo
de biomassa, sugerindo que a umidade tem papel fundamental no
processo de crescimento, ao passo que a ocorr{\^e}ncia de fogo
{\'e} o principal agente redutor do incremento. A an{\'a}lise
das mudan{\c{c}}as inter-anuais de BAS por classe de
dist{\'u}rbio revelou que o deficit h{\'{\i}}drico foi o
principal causador de perdas de biomassa nas
vegeta{\c{c}}{\~o}es mais avan{\c{c}}adas, enquanto o fogo foi
mais danoso nas vegeta{\c{c}}{\~o}es secund{\'a}rias mais
jovens. No balan{\c{c}}o final do carbono, as trajet{\'o}rias
envolvendo pasto sujo e regenera{\c{c}}{\~a}o com pasto n{\~a}o
apresentaram influ{\^e}ncia significativa, funcionando apenas
como par{\^a}metro de crescimento. A vegeta{\c{c}}{\~a}o
secund{\'a}ria, por outro lado, mostrou grande potencial de
impacto nas emiss{\~o}es, respondendo por mais de 80% dos valores
encontrados no balan{\c{c}}o final do carbono. ABSTRACT: The
regrowth of secondary vegetation on deforested areas in the
Brazilian Amazon plays an important role in the emissions balance,
functioning as a dynamic carbon sink, and mitigating the impacts
of deforestation. The potential for this, however, depends on the
rates of vegetation growth over time, which will reflect in the
accumulated biomass stocks. How these stocks vary in relation to
the stages of regeneration and how the dynamics of vegetation
influences growth patterns is still poorly understood. For
understanding the patterns of carbon accumulation in secondary
vegetation across different stages of regeneration, land cover
trajectories based on the classes 'dirty pasture', 'regeneration
with pasture' and 'secondary vegetation' of the TerraClass system
and multi-temporal maps of above-ground biomass (BAS) estimated
from the RADAR PALSAR-ALOS data were used. Based on these data,
vegetation growth at different stages of regeneration in the
Brazilian Amazon for the years 2007, 2008, 2009 and 2010 was
quantified. As secondary vegetation growth is influenced by
environmental conditions, it was also tested how the biomass
stocks varied according to different intensities of maximum
accumulated water deficit (MCWD) and of the occurrence of fire.
The results showed that the combination of the trajectory model of
land cover classes with the biomass maps was consistent. The
estimated BAS increased from the trajectory representing the
beginning of regeneration (Tr1) to the trajectory representing the
most advanced regeneration stage (Tr7). The analysis of the
inter-annual BAS changes within each trajectory showed the annual
BAS increase from 'dirty pasture' to 'regeneration with pasture',
while the trajectories involving the 'secondary vegetation' class
presented a reduction in biomass in any of the periods analyzed.
The stratification of BAS in these trajectories as a function of
disturbance classes revealed the magnitude of their impact on the
accumulation of biomass. The results suggested that water deficit
plays a fundamental role in the growth process, whereas the
occurrence of fire is the main agent constraining biomass increase
throught time. The analysis of the inter-annual changes of BAS by
classes of disturbance revealed that the water deficit was the
main cause of biomass loss in the most advanced stages of
vegetation regeneration, while fire was more damaging in the
younger secondary vegetation. In the final carbon balance, the
trajectories involving 'shurubby pasture' and 'regeneration with
pasture' did not present significant influence, functioning only
as a growth parameter. Secondary vegetation, on the other hand,
showed great potential for impact on emissions, accounting for
more than 80% of the values found in the final carbon balance.",
committee = "von Randow, Celso (presidente) and Aguiar, Ana Paula Dutra de
(orientador) and Arag{\~a}o, Luiz Eduardo Oliveira e Cruz de
(orientador) and Longo, Marcos and Brito, Alan de",
englishtitle = "Multi temporal analysis of biomass changes in secondary vegetation
in the Brazilian Amazon",
language = "pt",
pages = "106",
ibi = "8JMKD3MGP3W34R/3R44PJP",
url = "http://urlib.net/ibi/8JMKD3MGP3W34R/3R44PJP",
targetfile = "publicacao.pdf",
urlaccessdate = "27 abr. 2024"
}