Distúrbios decorrentes de Blowdown em uma área de floresta na Amazônia Central
The evolution of GIS allowed to discover natural damage on forest, especialy disturbance caused by convective storms called blowdon. In this work were analised images form the ZF-2, a research area from INPA (Manaus – Brasil) captured by the hiperspectral sensor (HYPERYON)and selected five blowdo...
| Autor principal: | Guimarães, Giuliano Piotto |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/5095 http://lattes.cnpq.br/7304576379080551 |
| Resumo: |
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The evolution of GIS allowed to discover natural damage on forest, especialy
disturbance caused by convective storms called blowdon. In this work were analised
images form the ZF-2, a research area from INPA (Manaus – Brasil) captured by the
hiperspectral sensor (HYPERYON)and selected five blowdowns that ocorred in
2005/January. The aim of this research was to compare the NPV values (nonphotosynthetic
vegetation) with the mortality rates and necromass mesured in field.
Severely affecteed areas were indentified by four “endmember spectral mixing analysis”
(SMA). From this analis was determineted the coordinates of five diferent spectral
response in each blowdown forming a damaege canopy gradiant from 0 to 100%. Plots
( 20x20 m) were insataled and was mesured the dbh from all living and dead trees over
10 cm. The results showed a low relationship beetween the NPV value and the mortality
(p ≥0,05) rate as well with the necromass (p ≥0,05). Probably this was caused by the
dificult to install the plots with precision and the influece of external trees. With the
improvement of the aplicated methodology it will be possible to validate the relationship
bettween the spectral atribut and the mesures on the filed producing accurate
informations for the carbon dinamic models. |