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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
14/12/2020 |
Data da última atualização: |
14/12/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALENCAR, A.; SHIMBO, J. Z.; LENTI, F.; MARQUES, C. B.; ZIMBRES, B.; ROSA, M.; ARRUDA, V.; CASTRO, I.; RIBEIRO, J. P. F. M.; VARELA, V.; ALENCAR, I.; PIONTEKOWSKI, V.; RIBEIRO, V.; BUSTAMANTE, M. M. C.; SANO, E. E.; BARROSO, M. |
Afiliação: |
EDSON EYJI SANO, CPAC. |
Título: |
Mapping Three Decades of Changes in the Brazilian Savanna Native Vegetation Using Landsat Data Processed in the Google Earth Engine Platform. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Remote Sensing, v. 12, n. 6, 2020. |
ISSN: |
2072-4292 |
Idioma: |
Português |
Conteúdo: |
Widespread in the subtropics and tropics of the Southern Hemisphere, savannas are highly heterogeneous and seasonal natural vegetation types, which makes change detection (natural vs. anthropogenic) a challenging task. The Brazilian Cerrado represents the largest savanna in South America, and the most threatened biome in Brazil owing to agricultural expansion. To assess the native Cerrado vegetation (NV) areas most susceptible to natural and anthropogenic change over time, we classified 33 years (1985?2017) of Landsat imagery available in the Google Earth Engine (GEE) platform. The classification strategy used combined empirical and statistical decision trees to generate reference maps for machine learning classification and a novel annual dataset of the predominant Cerrado NV types (forest, savanna, and grassland). We obtained annual NV maps with an average overall accuracy ranging from 87% (at level 1 NV classification) to 71% over the time series, distinguishing the three main NV types. This time series was then used to generate probability maps for each NV class. The native vegetation in the Cerrado biome declined at an average rate of 0.5% per year (748,687 ha yr?1), mostly affecting forests and savannas. From 1985 to 2017, 24.7 million hectares of NV were lost, and now only 55% of the NV original distribution remains. Of the remnant NV in 2017 (112.6 million hectares), 65% has been stable over the years, while 12% changed among NV types, and 23% was converted to other land uses but is now in some level of secondary NV. Our results were fundamental in indicating areas with higher rates of change in a long time series in the Brazilian Cerrado and to highlight the challenges of mapping distinct NV types in a highly seasonal and heterogeneous savanna biome. MenosWidespread in the subtropics and tropics of the Southern Hemisphere, savannas are highly heterogeneous and seasonal natural vegetation types, which makes change detection (natural vs. anthropogenic) a challenging task. The Brazilian Cerrado represents the largest savanna in South America, and the most threatened biome in Brazil owing to agricultural expansion. To assess the native Cerrado vegetation (NV) areas most susceptible to natural and anthropogenic change over time, we classified 33 years (1985?2017) of Landsat imagery available in the Google Earth Engine (GEE) platform. The classification strategy used combined empirical and statistical decision trees to generate reference maps for machine learning classification and a novel annual dataset of the predominant Cerrado NV types (forest, savanna, and grassland). We obtained annual NV maps with an average overall accuracy ranging from 87% (at level 1 NV classification) to 71% over the time series, distinguishing the three main NV types. This time series was then used to generate probability maps for each NV class. The native vegetation in the Cerrado biome declined at an average rate of 0.5% per year (748,687 ha yr?1), mostly affecting forests and savannas. From 1985 to 2017, 24.7 million hectares of NV were lost, and now only 55% of the NV original distribution remains. Of the remnant NV in 2017 (112.6 million hectares), 65% has been stable over the years, while 12% changed among NV types, and 23% was converted to other ... Mostrar Tudo |
Thesagro: |
Cerrado; Desmatamento; Floresta; Pastagem. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219146/1/SANO-MAPPING-THREE-DECADES-OF-CHANGES-IN-THE-BRAZILIAN-CERRADO-USING-GEE.pdf
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Marc: |
LEADER 02778naa a2200361 a 4500 001 2128057 005 2020-12-14 008 2020 bl uuuu u00u1 u #d 022 $a2072-4292 100 1 $aALENCAR, A. 245 $aMapping Three Decades of Changes in the Brazilian Savanna Native Vegetation Using Landsat Data Processed in the Google Earth Engine Platform.$h[electronic resource] 260 $c2020 520 $aWidespread in the subtropics and tropics of the Southern Hemisphere, savannas are highly heterogeneous and seasonal natural vegetation types, which makes change detection (natural vs. anthropogenic) a challenging task. The Brazilian Cerrado represents the largest savanna in South America, and the most threatened biome in Brazil owing to agricultural expansion. To assess the native Cerrado vegetation (NV) areas most susceptible to natural and anthropogenic change over time, we classified 33 years (1985?2017) of Landsat imagery available in the Google Earth Engine (GEE) platform. The classification strategy used combined empirical and statistical decision trees to generate reference maps for machine learning classification and a novel annual dataset of the predominant Cerrado NV types (forest, savanna, and grassland). We obtained annual NV maps with an average overall accuracy ranging from 87% (at level 1 NV classification) to 71% over the time series, distinguishing the three main NV types. This time series was then used to generate probability maps for each NV class. The native vegetation in the Cerrado biome declined at an average rate of 0.5% per year (748,687 ha yr?1), mostly affecting forests and savannas. From 1985 to 2017, 24.7 million hectares of NV were lost, and now only 55% of the NV original distribution remains. Of the remnant NV in 2017 (112.6 million hectares), 65% has been stable over the years, while 12% changed among NV types, and 23% was converted to other land uses but is now in some level of secondary NV. Our results were fundamental in indicating areas with higher rates of change in a long time series in the Brazilian Cerrado and to highlight the challenges of mapping distinct NV types in a highly seasonal and heterogeneous savanna biome. 650 $aCerrado 650 $aDesmatamento 650 $aFloresta 650 $aPastagem 700 1 $aSHIMBO, J. Z. 700 1 $aLENTI, F. 700 1 $aMARQUES, C. B. 700 1 $aZIMBRES, B. 700 1 $aROSA, M. 700 1 $aARRUDA, V. 700 1 $aCASTRO, I. 700 1 $aRIBEIRO, J. P. F. M. 700 1 $aVARELA, V. 700 1 $aALENCAR, I. 700 1 $aPIONTEKOWSKI, V. 700 1 $aRIBEIRO, V. 700 1 $aBUSTAMANTE, M. M. C. 700 1 $aSANO, E. E. 700 1 $aBARROSO, M. 773 $tRemote Sensing$gv. 12, n. 6, 2020.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
15/10/2015 |
Data da última atualização: |
01/03/2016 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
NASCIMENTO FILHO, E. C. do; SANTOS, J. C. da S.; BORGES, A. L. |
Afiliação: |
EDSON CARVALHO DO NASCIMENTO FILHO; JEAN CLEBER DA SILVA SANTOS; ANA LUCIA BORGES, CNPMF. |
Título: |
Produtividade de variedades de bananeiras cultivadas em sistema orgânico. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
In: SEMANA DE ATUALIZAÇÃO EM CIÊNCIAS AGRÁRIAS AMBIENTAIS E BIOLÓGICAS, 1., 2014, Cruz Das Almas, BA. Produção e equilíbrio ambiental: anais. Cruz Das Almas, BA: UFRB, 2014. |
Idioma: |
Português |
Conteúdo: |
A banana (Musa spp) ocupa a 23 posição em volume de produção (6,9 milhões de toneladas) e área cultivada (490 mil hectares) dentre as fruteiras. É a fruta mais consumida no Brasil e no mundo na forma natural (fresca), tanto por ser produzida em todos os países tropicais quanto por seu valor nutricional. |
Thesagro: |
Adubo orgânico; Banana. |
Thesaurus NAL: |
Organic fertilizers. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/131146/1/Produtividade-de-variedades0001.pdf
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Marc: |
LEADER 00962nam a2200169 a 4500 001 2026430 005 2016-03-01 008 2014 bl uuuu u00u1 u #d 100 1 $aNASCIMENTO FILHO, E. C. do 245 $aProdutividade de variedades de bananeiras cultivadas em sistema orgânico.$h[electronic resource] 260 $aIn: SEMANA DE ATUALIZAÇÃO EM CIÊNCIAS AGRÁRIAS AMBIENTAIS E BIOLÓGICAS, 1., 2014, Cruz Das Almas, BA. Produção e equilíbrio ambiental: anais. Cruz Das Almas, BA: UFRB$c2014 520 $aA banana (Musa spp) ocupa a 23 posição em volume de produção (6,9 milhões de toneladas) e área cultivada (490 mil hectares) dentre as fruteiras. É a fruta mais consumida no Brasil e no mundo na forma natural (fresca), tanto por ser produzida em todos os países tropicais quanto por seu valor nutricional. 650 $aOrganic fertilizers 650 $aAdubo orgânico 650 $aBanana 700 1 $aSANTOS, J. C. da S. 700 1 $aBORGES, A. L.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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