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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Rondônia. |
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Data corrente: |
13/10/2021 |
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Data da última atualização: |
13/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PASTANA, D. N. B.; MODENA, E. de S.; WADT, L. H. de O.; NEVES, E. de S.; MARTORANO, L. G.; LIRA-GUEDES, A. C.; SOUZA, R. L. F. de; COSTA, F. F.; BATISTA, A. P. B.; GUEDES, M. C. |
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Afiliação: |
DAYANE NATHÁLIA BARBOSA PASTANA, UFLA; ÉRICA DE SOUZA MODENA, CPAF-AP; LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO; EZAQUIEL DE SOUZA NEVES, UFAC; LUCIETA GUERREIRO MARTORANO, CPATU; ANA CLAUDIA LIRA GUEDES, CPAF-AP; RAFAEL LUCAS FIGUEIREDO DE SOUZA, ESALQ/USP; FELIPE FELIX COSTA, UNIFAP; ANDERSON PEDRO BERNARDINA BATISTA, IFAP; MARCELINO CARNEIRO GUEDES, CPAF-AP. |
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Título: |
Strong El Niño reduces fruit production of Brazil-nut trees in the eastern Amazon. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Acta Amazonica, v. 51, n. 3, p. 270-279, Jul-Sep. 2021. |
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DOI: |
https://doi.org/10.1590/1809-4392202003702 |
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Idioma: |
Inglês |
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Conteúdo: |
The Brazil-nut tree (Bertholletia excelsa) is native to the Amazon rainforest, and its fruit production varies naturally with climatic conditions. Our aim was to evaluate the temporal variation in Brazil-nut production associated with climatic variables, including the strong El Niño of 2015/2016. The study was carried out in two 9-ha permanent plots in the northeastern Brazilian Amazon from 2007 to 2018: one in forest (12-year monitoring) and the other in savannah/forest transition (eight years). Overall, we monitored fruit production of 205 trees with diameter at breast height ≥ 50 cm. Annual fruit production was related to temporal series (2005-2018) of climatic data (the Oceanic Niño Index; and precipitation and air temperature from two local meteorological stations). Average fruit production per tree in 2017 was eight times lower than in 2015 and two times lower than the general average for both sites, and was significantly associated to the El Niño of 2015/2016, that increased average maximum monthly temperature and reduced the precipitation in the region, extending the dry season from three to six months. Years with higher and lower fruit production per tree coincided in both sites. Annual fruit production was significantly and negatively correlated with thermal anomalies that occurred in the third semester prior to harvest monitoring. Years with higher production were related with predominance of neutrality or the La Niña phenomenon at the global scale, and higher rainfall at the local scale. The relationship of fruit production with climate was independent of the local habitat. MenosThe Brazil-nut tree (Bertholletia excelsa) is native to the Amazon rainforest, and its fruit production varies naturally with climatic conditions. Our aim was to evaluate the temporal variation in Brazil-nut production associated with climatic variables, including the strong El Niño of 2015/2016. The study was carried out in two 9-ha permanent plots in the northeastern Brazilian Amazon from 2007 to 2018: one in forest (12-year monitoring) and the other in savannah/forest transition (eight years). Overall, we monitored fruit production of 205 trees with diameter at breast height ≥ 50 cm. Annual fruit production was related to temporal series (2005-2018) of climatic data (the Oceanic Niño Index; and precipitation and air temperature from two local meteorological stations). Average fruit production per tree in 2017 was eight times lower than in 2015 and two times lower than the general average for both sites, and was significantly associated to the El Niño of 2015/2016, that increased average maximum monthly temperature and reduced the precipitation in the region, extending the dry season from three to six months. Years with higher and lower fruit production per tree coincided in both sites. Annual fruit production was significantly and negatively correlated with thermal anomalies that occurred in the third semester prior to harvest monitoring. Years with higher production were related with predominance of neutrality or the La Niña phenomenon at the global scale, and higher rai... Mostrar Tudo |
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Palavras-Chave: |
Climate variability; Índice oceânico do Niño; Oceanic Niño Index; Productivity; Variação climática. |
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Thesagro: |
Bertholletia Excelsa; Produtividade. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226934/1/CPAF-AP-2021-Strong-El-Nino-reduces-fruit-production-of-Brazil-nut.pdf
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Marc: |
LEADER 02615naa a2200325 a 4500
001 2135306
005 2021-10-13
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/1809-4392202003702$2DOI
100 1 $aPASTANA, D. N. B.
245 $aStrong El Niño reduces fruit production of Brazil-nut trees in the eastern Amazon.$h[electronic resource]
260 $c2021
520 $aThe Brazil-nut tree (Bertholletia excelsa) is native to the Amazon rainforest, and its fruit production varies naturally with climatic conditions. Our aim was to evaluate the temporal variation in Brazil-nut production associated with climatic variables, including the strong El Niño of 2015/2016. The study was carried out in two 9-ha permanent plots in the northeastern Brazilian Amazon from 2007 to 2018: one in forest (12-year monitoring) and the other in savannah/forest transition (eight years). Overall, we monitored fruit production of 205 trees with diameter at breast height ≥ 50 cm. Annual fruit production was related to temporal series (2005-2018) of climatic data (the Oceanic Niño Index; and precipitation and air temperature from two local meteorological stations). Average fruit production per tree in 2017 was eight times lower than in 2015 and two times lower than the general average for both sites, and was significantly associated to the El Niño of 2015/2016, that increased average maximum monthly temperature and reduced the precipitation in the region, extending the dry season from three to six months. Years with higher and lower fruit production per tree coincided in both sites. Annual fruit production was significantly and negatively correlated with thermal anomalies that occurred in the third semester prior to harvest monitoring. Years with higher production were related with predominance of neutrality or the La Niña phenomenon at the global scale, and higher rainfall at the local scale. The relationship of fruit production with climate was independent of the local habitat.
650 $aBertholletia Excelsa
650 $aProdutividade
653 $aClimate variability
653 $aÍndice oceânico do Niño
653 $aOceanic Niño Index
653 $aProductivity
653 $aVariação climática
700 1 $aMODENA, E. de S.
700 1 $aWADT, L. H. de O.
700 1 $aNEVES, E. de S.
700 1 $aMARTORANO, L. G.
700 1 $aLIRA-GUEDES, A. C.
700 1 $aSOUZA, R. L. F. de
700 1 $aCOSTA, F. F.
700 1 $aBATISTA, A. P. B.
700 1 $aGUEDES, M. C.
773 $tActa Amazonica$gv. 51, n. 3, p. 270-279, Jul-Sep. 2021.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
09/12/2008 |
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Data da última atualização: |
27/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
NOVOTNY, E. H.; KNICKER, H.; MARTIN NETO, L.; AZEREDO, R. B. V.; HAYES, M. H. B. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; H. Knicker, Lehrstuhl fur Bodenkunde, Technische Universitat Munchen; LADISLAU MARTIN NETO, DE/P&D; R. B. V. AZEREDO, UFF; M. H. B. HAYES, Chemical and Environmental Sciences University of Limerick. |
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Título: |
Effect of residual vanadyl ions on the spectroscopic analysis of humic acids: a multivariate approach. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
European Journal of Soil Science, Oxford, v. 59, n. 3, p. 439-444, Jun. 2008. |
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DOI: |
https://doi.org/10.1111/j.1365-2389.2007.00983.x |
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Idioma: |
Inglês |
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Conteúdo: |
In a study of the vanadyl (VO2þ)-humic acids system, the residual vanadyl ion suppressed fluorescence and specific electron paramagnetic resonance (EPR) and NMR signals. In the case of NMR, the proton rotating frame relaxation times (T1qH) indicate that this suppression is due to an inefficient H-C cross polarization, which is a consequence of a shortening of T1qH. Principal components analysis (PCA) facilitated the isolation of the effect of the VO2þ ion and indicated that the organic free radical signal was due to at least two paramagnetic centres and that the VO2þ ion preferentially suppressed the species whose electronic density is delocalized over O atoms (greater g-factor). additionally, the newly obtained variables (principal components ? PC) indicated that, as the result of the more intense tillage a relative increase occurred in the accumulation of: (i) recalcitrant structures; (ii) lignin and long-chain alkyl structures; and (iii) organic free radicals with smaller g-factors. |
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Palavras-Chave: |
Ácidos húmicos; Análise espectroscópica. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01701naa a2200205 a 4500
001 1339740
005 2021-10-27
008 2008 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/j.1365-2389.2007.00983.x$2DOI
100 1 $aNOVOTNY, E. H.
245 $aEffect of residual vanadyl ions on the spectroscopic analysis of humic acids$ba multivariate approach.$h[electronic resource]
260 $c2008
520 $aIn a study of the vanadyl (VO2þ)-humic acids system, the residual vanadyl ion suppressed fluorescence and specific electron paramagnetic resonance (EPR) and NMR signals. In the case of NMR, the proton rotating frame relaxation times (T1qH) indicate that this suppression is due to an inefficient H-C cross polarization, which is a consequence of a shortening of T1qH. Principal components analysis (PCA) facilitated the isolation of the effect of the VO2þ ion and indicated that the organic free radical signal was due to at least two paramagnetic centres and that the VO2þ ion preferentially suppressed the species whose electronic density is delocalized over O atoms (greater g-factor). additionally, the newly obtained variables (principal components ? PC) indicated that, as the result of the more intense tillage a relative increase occurred in the accumulation of: (i) recalcitrant structures; (ii) lignin and long-chain alkyl structures; and (iii) organic free radicals with smaller g-factors.
653 $aÁcidos húmicos
653 $aAnálise espectroscópica
700 1 $aKNICKER, H.
700 1 $aMARTIN NETO, L.
700 1 $aAZEREDO, R. B. V.
700 1 $aHAYES, M. H. B.
773 $tEuropean Journal of Soil Science, Oxford$gv. 59, n. 3, p. 439-444, Jun. 2008.
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Embrapa Solos (CNPS) |
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