Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134527
Title: Biomass and vegetation index by remote sensing in different caatinga forest areas.
Authors: LUZ, L. R.
GIONGO, V.
SANTOS, A. M. dos
LOPES, R. J. de C.
LIMA JÚNIOR, C. de
Affiliation: LEUDIANE RODRIGUES LUZ; VANDERLISE GIONGO, CPATSA; ANTONIO MARCOS DOS SANTOS; RODRIGO JOSÉ DE CARVALHO LOPES; CLAUDEMIRO DE LIMA JÚNIOR.
Date Issued: 2022
Citation: Ciência Rural, Santa Maria, v. 52, n. 2, e20201104, 2022.
Description: Continued unsustainable exploitation of natural resources promotes environmental degradation and threatens the preservation of dry forests around the world. This situation exposes the fragility and the necessity to study landscape transformations. In addition, it is necessary to consider the biomass quantity and to establish strategies to monitor natural and anthropic disturbances. Thus, this research analyzed the relationship between vegetation index and the estimated biomass using allometric equations in different Brazilian caatinga forest areas from satellite images. This procedure is performed by estimating the biomass from 9 dry tropical forest fragments using allometric equations. Area delimitations were obtained from the Embrapa collection of dendrometric data collected in the period between 2011 and 2012. Spectral variables were obtained from the orthorectified images of the RapidEye satellite. The aboveground biomass ranged from 6.88 to 123.82 Mg.ha-1. SAVI values were L = 1 and L = 0.5, while NDVI and EVI ranged from 0.1835 to 0.4294, 0.2197 to 0.5019, 0.3622 to 0.7584, and 0.0987 to 0.3169, respectively. Relationships among the estimated biomass and the vegetation indexes were moderate, with correlation coefficients (Rs) varying between 0.64 and 0.58. The best adjusted equation was the SAVI equation, for which the coefficient of determination was R2 = 0.50, R2 aj = 0.49, RMSE = 17.18 Mg.ha-1 and mean absolute error of prediction (MAE) = 14.07 Mg.ha-1, confirming the importance of the Savi index in estimating the caatinga aboveground biomass.
Thesagro: Vegetação
Vegetação Nativa
Caatinga
Floresta
Biomassa
NAL Thesaurus: Remote sensing
Dry forests
Renewable energy sources
Structural equation modeling
Biomass
Microbial biomass
Keywords: Snsoriamento remoto
Florestas secas
Energia renovável
Modelagem
Language: Ingles
DOI: 10.1590/0103-8478cr20201104
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CPATSA)

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