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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
05/06/2023 |
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Data da última atualização: |
05/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COSTA, L. S.; SANO, E. E.; FERREIRA, M. E.; MUNHOZ, C. B. R.; COSTA, J. V. S.; ALVES JÚNIOR, L. R.; MELLO, T. R. B.; BUSTAMANTE, M. M. C. |
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Afiliação: |
LUCAS SILVA COSTA; EDSON EYJI SANO, CPAC; MANUEL EDUARDO FERREIRA; CÁSSIA BEATRIZ RODRIGUES MUNHOZ; JOÃO VÍTOR SILVA COSTA; LEOMAR RUFINO ALVES JÚNIOR; THIAGO ROURE BANDEIRA DE MELLO; MERCEDES MARIA DA CUNHA BUSTAMANTE. |
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Título: |
Woody plant encroachment in a seasonal tropical savanna: lessons about classifiers and accuracy from UAV images. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Remote Sensing, v. 15, n. 9, 2023. |
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Páginas: |
p. 1-26 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Woody plant encroachment in grassy ecosystems is a widely reported phenomenon associated with negative impacts on ecosystem functions. Most studies of this phenomenon have been carried out in arid and semi-arid grasslands. Therefore, studies in tropical regions, particularly savannas, which are composed of grassland and woodland mosaics, are needed. Our objective was to evaluate the accuracy of woody encroachment classification in the Brazilian Cerrado, a tropical savanna. We acquired dry and wet season unmanned aerial vehicle (UAV) images using RGB and multispectral cameras that were processed by the support vector machine (SVM), decision tree (DT), and random forest (RF) classifiers. We also compared two validation methods: the orthomosaic and in situ methods. We targeted two native woody species: Baccharis retusa and Trembleya parviflora. Identification of these two species was statistically (p < 0.05) most accurate in the wet season RGB images classified by the RF algorithm, with an overall accuracy (OA) of 92.7%. Relating to validation assessments, the in situ method was more susceptible to underfitting scenarios, especially using an RF classifier. The OA was higher in grassland than in woodland formations. Our results show that woody encroachment classification in a tropical savanna is possible using UAV images and field surveys and is suggested to be conducted during the wet season. It is challenging to classify UAV images in highly diverse ecosystems such as the Cerrado; therefore, whenever possible, researchers should use multiple accuracy assessment methods. In the case of using in situ accuracy assessment, we suggest a minimum of 40 training samples per class and to use multiple classifiers (e.g., RF and DT). Our findings contribute to the generation of tools that optimize time and cost for the monitoring and management of woody encroachment in tropical savannas. MenosAbstract: Woody plant encroachment in grassy ecosystems is a widely reported phenomenon associated with negative impacts on ecosystem functions. Most studies of this phenomenon have been carried out in arid and semi-arid grasslands. Therefore, studies in tropical regions, particularly savannas, which are composed of grassland and woodland mosaics, are needed. Our objective was to evaluate the accuracy of woody encroachment classification in the Brazilian Cerrado, a tropical savanna. We acquired dry and wet season unmanned aerial vehicle (UAV) images using RGB and multispectral cameras that were processed by the support vector machine (SVM), decision tree (DT), and random forest (RF) classifiers. We also compared two validation methods: the orthomosaic and in situ methods. We targeted two native woody species: Baccharis retusa and Trembleya parviflora. Identification of these two species was statistically (p < 0.05) most accurate in the wet season RGB images classified by the RF algorithm, with an overall accuracy (OA) of 92.7%. Relating to validation assessments, the in situ method was more susceptible to underfitting scenarios, especially using an RF classifier. The OA was higher in grassland than in woodland formations. Our results show that woody encroachment classification in a tropical savanna is possible using UAV images and field surveys and is suggested to be conducted during the wet season. It is challenging to classify UAV images in highly diverse ecosystems such a... Mostrar Tudo |
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Palavras-Chave: |
Drone; Invasão de plantas; Multiespectral. |
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Thesagro: |
Cerrado; Pastagem; Sensoriamento Remoto. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154248/1/Sano-WOODY-PLANT-ENCHROACHMENT-IN-A-SEASONAL-TROPICAL-SAVANNA-LESSONS.pdf
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Marc: |
LEADER 02740naa a2200289 a 4500
001 2154248
005 2023-06-05
008 2023 bl uuuu u00u1 u #d
100 1 $aCOSTA, L. S.
245 $aWoody plant encroachment in a seasonal tropical savanna$blessons about classifiers and accuracy from UAV images.$h[electronic resource]
260 $c2023
300 $ap. 1-26
520 $aAbstract: Woody plant encroachment in grassy ecosystems is a widely reported phenomenon associated with negative impacts on ecosystem functions. Most studies of this phenomenon have been carried out in arid and semi-arid grasslands. Therefore, studies in tropical regions, particularly savannas, which are composed of grassland and woodland mosaics, are needed. Our objective was to evaluate the accuracy of woody encroachment classification in the Brazilian Cerrado, a tropical savanna. We acquired dry and wet season unmanned aerial vehicle (UAV) images using RGB and multispectral cameras that were processed by the support vector machine (SVM), decision tree (DT), and random forest (RF) classifiers. We also compared two validation methods: the orthomosaic and in situ methods. We targeted two native woody species: Baccharis retusa and Trembleya parviflora. Identification of these two species was statistically (p < 0.05) most accurate in the wet season RGB images classified by the RF algorithm, with an overall accuracy (OA) of 92.7%. Relating to validation assessments, the in situ method was more susceptible to underfitting scenarios, especially using an RF classifier. The OA was higher in grassland than in woodland formations. Our results show that woody encroachment classification in a tropical savanna is possible using UAV images and field surveys and is suggested to be conducted during the wet season. It is challenging to classify UAV images in highly diverse ecosystems such as the Cerrado; therefore, whenever possible, researchers should use multiple accuracy assessment methods. In the case of using in situ accuracy assessment, we suggest a minimum of 40 training samples per class and to use multiple classifiers (e.g., RF and DT). Our findings contribute to the generation of tools that optimize time and cost for the monitoring and management of woody encroachment in tropical savannas.
650 $aCerrado
650 $aPastagem
650 $aSensoriamento Remoto
653 $aDrone
653 $aInvasão de plantas
653 $aMultiespectral
700 1 $aSANO, E. E.
700 1 $aFERREIRA, M. E.
700 1 $aMUNHOZ, C. B. R.
700 1 $aCOSTA, J. V. S.
700 1 $aALVES JÚNIOR, L. R.
700 1 $aMELLO, T. R. B.
700 1 $aBUSTAMANTE, M. M. C.
773 $tRemote Sensing$gv. 15, n. 9, 2023.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 91 | |
| 1. |  | CARVALHO, A. M.; BUSTAMANTE, M. M. C. Decomposição de resíduos vegetais e efeitos em carbono, nitrogênio e fósforo do solo sob sistemas convencional e plantio direto. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 28.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 12.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 10.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 7., 2008, Londrina. FertBio 2008: desafios para o uso do solo com eficiência e qualidade ambiental: anais. Londrina: SBCS: Embrapa Soja: IAPAR: UEL, 2008. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 10. | | BATISTELLA, M.; ARTAXO, P.; NOBRE, C.; BUSTAMANTE, M.; LUIZÃO, F. Results from LBA and vision for future Amazonian research. In: KELLER, M.; BUSTAMANTE, M.; GASH, J.; DIAS, P. S. (Ed.). Amazonia and global change. Washington: American Geophysical Union, 2009. p. 555-563 (Geophysical Monograph Series, 186)| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Territorial. |
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| 16. | | PARRON, L. M.; BUSTAMANTE, M. M. C.; MARKEWITZ, D.; PRADO, C. L. Availability of Nutrients in Solutions in a Gallery Forest of Cerrado Biome. In: CONFERÊNCIA CIENTÍFICA DO LBA, 3., 2004, Brasília, DF. Anais de trabalhos completos. Brasília, DF: LBA, 2004. Resumo 37.11-P.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 19. | | CARVALHO, A. M.; BUSTAMANTE, M. M. C.; ALCÂNTARA, F. A.; RESCK, I. S.; LEMOS, S. S. Characterization by solid-state CPMAS 13C NMR spectroscopy of decomposing plant residues in conventional and no-tillage systems in Central Brazil. Soil and Tillage Research, Amsterdam, v. 102, n. 1, p. 144-150, jan. 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 91 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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