Biomass and vegetation index by remote sensing in different caatinga forest areas.
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.
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2021-09-17
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Subjects: | Snsoriamento remoto, Florestas secas, Energia renovável, Modelagem, Vegetação, Vegetação Nativa, Caatinga, Floresta, Biomassa, Remote sensing, Dry forests, Renewable energy sources, Structural equation modeling, Biomass, Microbial biomass, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134527 |
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dig-alice-doc-11345272021-09-17T18:00:46Z Biomass and vegetation index by remote sensing in different caatinga forest areas. LUZ, L. R. GIONGO, V. SANTOS, A. M. dos LOPES, R. J. de C. LIMA JÚNIOR, C. de LEUDIANE RODRIGUES LUZ; VANDERLISE GIONGO, CPATSA; ANTONIO MARCOS DOS SANTOS; RODRIGO JOSÉ DE CARVALHO LOPES; CLAUDEMIRO DE LIMA JÚNIOR. Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass 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. 2021-09-17T18:00:38Z 2021-09-17T18:00:38Z 2021-09-17 2022 Artigo de periódico Ciência Rural, Santa Maria, v. 52, n. 2, e20201104, 2022. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134527 10.1590/0103-8478cr20201104 Ingles en openAccess |
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Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass |
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Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass LUZ, L. R. GIONGO, V. SANTOS, A. M. dos LOPES, R. J. de C. LIMA JÚNIOR, C. de Biomass and vegetation index by remote sensing in different caatinga forest areas. |
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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. |
author2 |
LEUDIANE RODRIGUES LUZ; VANDERLISE GIONGO, CPATSA; ANTONIO MARCOS DOS SANTOS; RODRIGO JOSÉ DE CARVALHO LOPES; CLAUDEMIRO DE LIMA JÚNIOR. |
author_facet |
LEUDIANE RODRIGUES LUZ; VANDERLISE GIONGO, CPATSA; ANTONIO MARCOS DOS SANTOS; RODRIGO JOSÉ DE CARVALHO LOPES; CLAUDEMIRO DE LIMA JÚNIOR. LUZ, L. R. GIONGO, V. SANTOS, A. M. dos LOPES, R. J. de C. LIMA JÚNIOR, C. de |
format |
Artigo de periódico |
topic_facet |
Snsoriamento remoto Florestas secas Energia renovável Modelagem Vegetação Vegetação Nativa Caatinga Floresta Biomassa Remote sensing Dry forests Renewable energy sources Structural equation modeling Biomass Microbial biomass |
author |
LUZ, L. R. GIONGO, V. SANTOS, A. M. dos LOPES, R. J. de C. LIMA JÚNIOR, C. de |
author_sort |
LUZ, L. R. |
title |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
title_short |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
title_full |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
title_fullStr |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
title_full_unstemmed |
Biomass and vegetation index by remote sensing in different caatinga forest areas. |
title_sort |
biomass and vegetation index by remote sensing in different caatinga forest areas. |
publishDate |
2021-09-17 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134527 |
work_keys_str_mv |
AT luzlr biomassandvegetationindexbyremotesensingindifferentcaatingaforestareas AT giongov biomassandvegetationindexbyremotesensingindifferentcaatingaforestareas AT santosamdos biomassandvegetationindexbyremotesensingindifferentcaatingaforestareas AT lopesrjdec biomassandvegetationindexbyremotesensingindifferentcaatingaforestareas AT limajuniorcde biomassandvegetationindexbyremotesensingindifferentcaatingaforestareas |
_version_ |
1756027720221851648 |