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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
05/12/2023 |
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Data da última atualização: |
05/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BERENGUER, E.; LENNOX, G. D.; FERREIRA, J. N.; MALHI, Y.; ARAGÃO, L. E. O. C.; BARRETO, J. R.; ESPÍRITO-SANTO, F. del B.; FIGUEIREDO, A. E. S.; FRANÇA, F.; GARDNER, T. A.; JOLY, C. A.; PALMEIRA, A. F.; QUESADA, C. A.; ROSSI, L. C.; SEIXAS, M. M. M. de; SMITH, C. C.; WITHEY, K.; BARLOW, J. |
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Afiliação: |
ERIKA BERENGUER, Lancaster University / University of Oxford; GARETH D. LENNOX, Lancaster University; JOICE NUNES FERREIRA, CPATU; YADVINDER MALHI, University of Oxford; LUIZ E. O. C. ARAGÃO, INPE / University of Exeter; JULIA RODRIGUES BARRETO, USP; FERNANDO DEL BON ESPÍRITO-SANTO, University of Leicester / USP; AXA EMANUELLE S. FIGUEIREDO, INPA; FILIPE FRANÇA, Lancaster University; TOBY ALAN GARDNER, Stockholm Environment Institute; CARLOS A. JOLY, Universidade Estadual de Campinas; ALESSANDRO F. PALMEIRA, UFPA / INPE; CARLOS ALBERTO QUESADA, INPA; LIANA CHESINI ROSSI, Universidade Estadual Paulista; MARINA MARIA MORAES DE SEIXAS, COLABORADORA CPATU; CHARLOTTE C. SMITH, Lancaster University; KIERAN WITHEY, Lancaster University; JOS BARLOW, Lancaster University / UFLA. |
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Título: |
Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
PNAS, v. 118, n. 30, e201937711, 2021. |
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DOI: |
https://doi.org/10.1073/pnas.2019377118 |
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Idioma: |
Inglês |
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Conteúdo: |
With humanity facing an unprecedented climate crisis, the conservation of tropical forests has never been so important - their vast terrestrial carbon stocks can be turned into emissions by climatic and human disturbances. However, the duration of these effects is poorly understood, and it is unclear whether impacts are amplified in forests with a history of previous human disturbance. Here, we focus on the Amazonian epicenter of the 2015-16 El Niño, a region that encompasses 1.2% of the Brazilian Amazon. We quantify, at high temporal resolution, the impacts of an extreme El Niño (EN) drought and extensive forest fires on plant mortality and carbon loss in undisturbed and human-modified forests. Mortality remained higher than pre-El Niño levels for 36 mo in EN-drought-affected forests and for 30 mo in EN-fire-affected forests. In EN-fire-affected forests, human disturbance significantly increased plant mortality. Our investigation of the ecological and physiological predictors of tree mortality showed that trees with lower wood density, bark thickness and leaf nitrogen content, as well as those that experienced greater fire intensity, were more vulnerable. Across the region, the 2015-16 El Niño led to the death of an estimated 2.5 ± 0.3 billion stems, resulting in emissions of 495 ± 94 Tg CO2. Three years after the El Niño, plant growth and recruitment had offset only 37% of emissions. Our results show that limiting forest disturbance will not only help maintain carbon stocks, but will also maximize the resistance of Amazonian forests if fires do occur MenosWith humanity facing an unprecedented climate crisis, the conservation of tropical forests has never been so important - their vast terrestrial carbon stocks can be turned into emissions by climatic and human disturbances. However, the duration of these effects is poorly understood, and it is unclear whether impacts are amplified in forests with a history of previous human disturbance. Here, we focus on the Amazonian epicenter of the 2015-16 El Niño, a region that encompasses 1.2% of the Brazilian Amazon. We quantify, at high temporal resolution, the impacts of an extreme El Niño (EN) drought and extensive forest fires on plant mortality and carbon loss in undisturbed and human-modified forests. Mortality remained higher than pre-El Niño levels for 36 mo in EN-drought-affected forests and for 30 mo in EN-fire-affected forests. In EN-fire-affected forests, human disturbance significantly increased plant mortality. Our investigation of the ecological and physiological predictors of tree mortality showed that trees with lower wood density, bark thickness and leaf nitrogen content, as well as those that experienced greater fire intensity, were more vulnerable. Across the region, the 2015-16 El Niño led to the death of an estimated 2.5 ± 0.3 billion stems, resulting in emissions of 495 ± 94 Tg CO2. Three years after the El Niño, plant growth and recruitment had offset only 37% of emissions. Our results show that limiting forest disturbance will not only help maintain carbon stock... Mostrar Tudo |
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Thesaurus Nal: |
Amazonia; Degradation; El Nino; Forest fires; Logging. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159191/1/Tracking.pdf
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Marc: |
LEADER 02681naa a2200397 a 4500
001 2159191
005 2023-12-05
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1073/pnas.2019377118$2DOI
100 1 $aBERENGUER, E.
245 $aTracking the impacts of El Niño drought and fire in human-modified Amazonian forests.$h[electronic resource]
260 $c2021
520 $aWith humanity facing an unprecedented climate crisis, the conservation of tropical forests has never been so important - their vast terrestrial carbon stocks can be turned into emissions by climatic and human disturbances. However, the duration of these effects is poorly understood, and it is unclear whether impacts are amplified in forests with a history of previous human disturbance. Here, we focus on the Amazonian epicenter of the 2015-16 El Niño, a region that encompasses 1.2% of the Brazilian Amazon. We quantify, at high temporal resolution, the impacts of an extreme El Niño (EN) drought and extensive forest fires on plant mortality and carbon loss in undisturbed and human-modified forests. Mortality remained higher than pre-El Niño levels for 36 mo in EN-drought-affected forests and for 30 mo in EN-fire-affected forests. In EN-fire-affected forests, human disturbance significantly increased plant mortality. Our investigation of the ecological and physiological predictors of tree mortality showed that trees with lower wood density, bark thickness and leaf nitrogen content, as well as those that experienced greater fire intensity, were more vulnerable. Across the region, the 2015-16 El Niño led to the death of an estimated 2.5 ± 0.3 billion stems, resulting in emissions of 495 ± 94 Tg CO2. Three years after the El Niño, plant growth and recruitment had offset only 37% of emissions. Our results show that limiting forest disturbance will not only help maintain carbon stocks, but will also maximize the resistance of Amazonian forests if fires do occur
650 $aAmazonia
650 $aDegradation
650 $aEl Nino
650 $aForest fires
650 $aLogging
700 1 $aLENNOX, G. D.
700 1 $aFERREIRA, J. N.
700 1 $aMALHI, Y.
700 1 $aARAGÃO, L. E. O. C.
700 1 $aBARRETO, J. R.
700 1 $aESPÍRITO-SANTO, F. del B.
700 1 $aFIGUEIREDO, A. E. S.
700 1 $aFRANÇA, F.
700 1 $aGARDNER, T. A.
700 1 $aJOLY, C. A.
700 1 $aPALMEIRA, A. F.
700 1 $aQUESADA, C. A.
700 1 $aROSSI, L. C.
700 1 $aSEIXAS, M. M. M. de
700 1 $aSMITH, C. C.
700 1 $aWITHEY, K.
700 1 $aBARLOW, J.
773 $tPNAS$gv. 118, n. 30, e201937711, 2021.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Suínos e Aves. Para informações adicionais entre em contato com cnpsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
21/03/2012 |
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Data da última atualização: |
21/06/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SANTOS, H. F. dos; KNAK, M. B.; CASTRO, M. L. de; SLONGO, J.; RITTERBUSCH, G. A.; KLEIN, T. A. P.; ESTEVES, P. A.; SILVA, A. D.; TREVISOL, I. M. |
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Afiliação: |
UFRGS; UFRGS; UFRGS; UFRGS; GISELE APARECIDA RITTERBUSCH; TANIA ALVINA POTTER KLEIN, CNPSA; PAULO AUGUSTO ESTEVES, CNPSA; IARA MARIA TREVISOL, CNPSA. |
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Título: |
Variants of the recently discovered avian gyrovirus 2 area detected in Southern Brazil and The Netherlands |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Veterinary Microbiology, v. 155, n. 2-4, p. 230-236, 2012. |
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Idioma: |
Inglês |
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Notas: |
Projeto/Plano de Ação: 02.09.13000-04. |
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Conteúdo: |
A genome of a virus preliminarily named avian gyrovirus 2 (AGV2), a close relative to chicken anemia virus, was recently discovered in a chicken in the state of Rio Grande do Sul, Southern Brazil. To study the occurrence of AGV2 in Rio Grande do Sul and the neighboring state Santa Catarina, a number of adult chickens (n = 108 and n = 48, respectively) were tested for the presence of AGV2 DNA. An AGV2-specific PCR was developed, optimized and used to analyze DNA extracted from clinical samples. AGV2 DNA was detected in 98/108 (90.7%) of samples collected in the state of Rio Grande do Sul and 29/48 (60.4%) of the samples collected in the state of Santa Catarina. In order to check whether AGV2 DNA would be detected in samples from a geographically distant region, DNA from brain samples of 21 diseased chickens from the Netherlands were tested independently, by the same method. In such specimens, 9/21 (42.9%) brain tissue samples were found to contain AVG2 DNA. Sequence analysis of some of the PCR products demonstrated that the amplified AGV2 sequences could vary up to 15.8% and could preliminarily be divided in three groups. This indicated the occurrence of variants of AGV2, which may reflect differences in geographical origin and/or in biological properties. The data presented here provides evidence that AGV2 seems fairly distributed in chickens in Southern Brazil and that AGV2 also circulates in the Netherlands. Besides, circulating viruses display genetic variants whose significance should be further examined, particularly to determine whether AGV2 would play any role in chicken diseases. MenosA genome of a virus preliminarily named avian gyrovirus 2 (AGV2), a close relative to chicken anemia virus, was recently discovered in a chicken in the state of Rio Grande do Sul, Southern Brazil. To study the occurrence of AGV2 in Rio Grande do Sul and the neighboring state Santa Catarina, a number of adult chickens (n = 108 and n = 48, respectively) were tested for the presence of AGV2 DNA. An AGV2-specific PCR was developed, optimized and used to analyze DNA extracted from clinical samples. AGV2 DNA was detected in 98/108 (90.7%) of samples collected in the state of Rio Grande do Sul and 29/48 (60.4%) of the samples collected in the state of Santa Catarina. In order to check whether AGV2 DNA would be detected in samples from a geographically distant region, DNA from brain samples of 21 diseased chickens from the Netherlands were tested independently, by the same method. In such specimens, 9/21 (42.9%) brain tissue samples were found to contain AVG2 DNA. Sequence analysis of some of the PCR products demonstrated that the amplified AGV2 sequences could vary up to 15.8% and could preliminarily be divided in three groups. This indicated the occurrence of variants of AGV2, which may reflect differences in geographical origin and/or in biological properties. The data presented here provides evidence that AGV2 seems fairly distributed in chickens in Southern Brazil and that AGV2 also circulates in the Netherlands. Besides, circulating viruses display genetic variants whose signi... Mostrar Tudo |
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Palavras-Chave: |
Gyrovirus 2. |
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Thesagro: |
Avicultura; Indústria. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02415naa a2200265 a 4500
001 1919818
005 2013-06-21
008 2012 bl uuuu u00u1 u #d
100 1 $aSANTOS, H. F. dos
245 $aVariants of the recently discovered avian gyrovirus 2 area detected in Southern Brazil and The Netherlands$h[electronic resource]
260 $c2012
500 $aProjeto/Plano de Ação: 02.09.13000-04.
520 $aA genome of a virus preliminarily named avian gyrovirus 2 (AGV2), a close relative to chicken anemia virus, was recently discovered in a chicken in the state of Rio Grande do Sul, Southern Brazil. To study the occurrence of AGV2 in Rio Grande do Sul and the neighboring state Santa Catarina, a number of adult chickens (n = 108 and n = 48, respectively) were tested for the presence of AGV2 DNA. An AGV2-specific PCR was developed, optimized and used to analyze DNA extracted from clinical samples. AGV2 DNA was detected in 98/108 (90.7%) of samples collected in the state of Rio Grande do Sul and 29/48 (60.4%) of the samples collected in the state of Santa Catarina. In order to check whether AGV2 DNA would be detected in samples from a geographically distant region, DNA from brain samples of 21 diseased chickens from the Netherlands were tested independently, by the same method. In such specimens, 9/21 (42.9%) brain tissue samples were found to contain AVG2 DNA. Sequence analysis of some of the PCR products demonstrated that the amplified AGV2 sequences could vary up to 15.8% and could preliminarily be divided in three groups. This indicated the occurrence of variants of AGV2, which may reflect differences in geographical origin and/or in biological properties. The data presented here provides evidence that AGV2 seems fairly distributed in chickens in Southern Brazil and that AGV2 also circulates in the Netherlands. Besides, circulating viruses display genetic variants whose significance should be further examined, particularly to determine whether AGV2 would play any role in chicken diseases.
650 $aAvicultura
650 $aIndústria
653 $aGyrovirus 2
700 1 $aKNAK, M. B.
700 1 $aCASTRO, M. L. de
700 1 $aSLONGO, J.
700 1 $aRITTERBUSCH, G. A.
700 1 $aKLEIN, T. A. P.
700 1 $aESTEVES, P. A.
700 1 $aSILVA, A. D.
700 1 $aTREVISOL, I. M.
773 $tVeterinary Microbiology$gv. 155, n. 2-4, p. 230-236, 2012.
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