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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
24/02/2015 |
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Data da última atualização: |
29/05/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VICCA, S.; BAHN, M.; ESTIARTE, M.; VAN LOON, E. E.; VARGAS, R.; ALBERTI, G.; AMBUS, P.; ARAIN, M. A.; BEIER, C.; BENTLEY, L. P.; BORKEN, W.; BUCHMANN, N.; COLLINS, S. L.; GATO, G. de; DUKES, J. S.; ESCOLAR, C.; FAY, P.; GUIDOLOTTI, G.; HANSON, P. J.; KAHMEN, A.; KRÖEL-DULAY, G.; LADREITER-KNAUSS, T.; LARSEN, K. S.; LELLEI-KOVACS, E.; LEBRIJA-TREJOS, E.; MAESTRE, F. T.; MARHAN, S.; MARSHALL, M.; MEIR, P.; MIAO, Y.; MUHR, J.; NIKLAUS, P. A.; OGAYA, R.; PEÑUELAS, J.; POLL, C.; RUSTAD, L. E.; SAVAGE, K.; SCHINDLBACHER, A.; SCHMIDT, I. K.; SMITH, A. R.; SOTTA, E. D.; SUSEELA, V.; TIETEMA, A.; VAN GESTEL, N.; VAN STRAATEN, O.; WAN, S.; WEBER, U.; JANSSENS, I. A. |
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Afiliação: |
ELENEIDE DOFF SOTTA, CPAF-AP. |
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Título: |
Can current moisture responses predict soil CO2 efflux under altered precipitation regimes? A synthesis of manipulation experiments. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Biogeosciences, v. 11, n. 11, p. 2991-3013, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
As a key component of the carbon cycle, soil CO2 efflux (SCE) is being increasingly studied to improve our mechanistic understanding of this important carbon flux. Predicting ecosystem responses to climate change often depends on extrapolation of current relationships between ecosystem processes and their climatic drivers to conditions not yet experienced by the ecosystem. This raises the question of to what extent these relationships remain unaltered beyond the current climatic window for which observations are available to constrain the relationships. Here, we evaluate whether current responses of SCE to fluctuations in soil temperature and soil water content can be used to predict SCE under altered rainfall patterns. Of the 58 experiments for which we gathered SCE data, 20 were discarded because either too few data were available or inconsistencies precluded their incorporation in the analyses. The 38 remaining experiments were used to test the hypothesis that a model parameterized with data from the control plots (using soil temperature and water content as predictor variables) could adequately predict SCE measured in the manipulated treatment. Only for 7 of these 38 experiments was this hypothesis rejected. Importantly, these were the experiments with the most reliable data sets, i.e., those providing high-frequency measurements of SCE. Regression tree analysis demonstrated that our hypothesis could be rejected only for experiments with measurement intervals of less than 11 days, and was not rejected for any of the 24 experiments with larger measurement intervals. This highlights the importance of high-frequency measurements when studying effects of altered precipitation on SCE, probably because infrequent measurement schemes have insufficient capacity to detect shifts in the climate dependencies of SCE. Hence, the most justified answer to the question of whether current moisture responses of SCE can be extrapolated to predict SCE under altered precipitation regimes is ?no? ? as based on the most reliable data sets available. We strongly recommend that future experiments focus more strongly on establishing response functions across a broader range of precipitation regimes and soil moisture conditions. Such experiments should make accurate measurements of water availability, should conduct high-frequency SCE measurements, and should consider both instantaneous responses and the potential legacy effects of climate extremes. This is important, because with the novel approach presented here, we demonstrated that, at least for some ecosystems, current moisture responses could not be extrapolated to predict SCE under altered rainfall conditions. MenosAs a key component of the carbon cycle, soil CO2 efflux (SCE) is being increasingly studied to improve our mechanistic understanding of this important carbon flux. Predicting ecosystem responses to climate change often depends on extrapolation of current relationships between ecosystem processes and their climatic drivers to conditions not yet experienced by the ecosystem. This raises the question of to what extent these relationships remain unaltered beyond the current climatic window for which observations are available to constrain the relationships. Here, we evaluate whether current responses of SCE to fluctuations in soil temperature and soil water content can be used to predict SCE under altered rainfall patterns. Of the 58 experiments for which we gathered SCE data, 20 were discarded because either too few data were available or inconsistencies precluded their incorporation in the analyses. The 38 remaining experiments were used to test the hypothesis that a model parameterized with data from the control plots (using soil temperature and water content as predictor variables) could adequately predict SCE measured in the manipulated treatment. Only for 7 of these 38 experiments was this hypothesis rejected. Importantly, these were the experiments with the most reliable data sets, i.e., those providing high-frequency measurements of SCE. Regression tree analysis demonstrated that our hypothesis could be rejected only for experiments with measurement intervals of less tha... Mostrar Tudo |
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Palavras-Chave: |
Rainfall. |
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Thesagro: |
Mudança Climática; Precipitação pluvial; Solo; Umidade. |
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Thesaurus Nal: |
climate change; humidity; soil. |
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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/item/118934/1/CAP-AP-2014-Can-current-moisture.pdf
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Marc: |
LEADER 04700naa a2200781 a 4500
001 2009572
005 2019-05-29
008 2014 bl uuuu u00u1 u #d
100 1 $aVICCA, S.
245 $aCan current moisture responses predict soil CO2 efflux under altered precipitation regimes? A synthesis of manipulation experiments.$h[electronic resource]
260 $c2014
520 $aAs a key component of the carbon cycle, soil CO2 efflux (SCE) is being increasingly studied to improve our mechanistic understanding of this important carbon flux. Predicting ecosystem responses to climate change often depends on extrapolation of current relationships between ecosystem processes and their climatic drivers to conditions not yet experienced by the ecosystem. This raises the question of to what extent these relationships remain unaltered beyond the current climatic window for which observations are available to constrain the relationships. Here, we evaluate whether current responses of SCE to fluctuations in soil temperature and soil water content can be used to predict SCE under altered rainfall patterns. Of the 58 experiments for which we gathered SCE data, 20 were discarded because either too few data were available or inconsistencies precluded their incorporation in the analyses. The 38 remaining experiments were used to test the hypothesis that a model parameterized with data from the control plots (using soil temperature and water content as predictor variables) could adequately predict SCE measured in the manipulated treatment. Only for 7 of these 38 experiments was this hypothesis rejected. Importantly, these were the experiments with the most reliable data sets, i.e., those providing high-frequency measurements of SCE. Regression tree analysis demonstrated that our hypothesis could be rejected only for experiments with measurement intervals of less than 11 days, and was not rejected for any of the 24 experiments with larger measurement intervals. This highlights the importance of high-frequency measurements when studying effects of altered precipitation on SCE, probably because infrequent measurement schemes have insufficient capacity to detect shifts in the climate dependencies of SCE. Hence, the most justified answer to the question of whether current moisture responses of SCE can be extrapolated to predict SCE under altered precipitation regimes is ?no? ? as based on the most reliable data sets available. We strongly recommend that future experiments focus more strongly on establishing response functions across a broader range of precipitation regimes and soil moisture conditions. Such experiments should make accurate measurements of water availability, should conduct high-frequency SCE measurements, and should consider both instantaneous responses and the potential legacy effects of climate extremes. This is important, because with the novel approach presented here, we demonstrated that, at least for some ecosystems, current moisture responses could not be extrapolated to predict SCE under altered rainfall conditions.
650 $aclimate change
650 $ahumidity
650 $asoil
650 $aMudança Climática
650 $aPrecipitação pluvial
650 $aSolo
650 $aUmidade
653 $aRainfall
700 1 $aBAHN, M.
700 1 $aESTIARTE, M.
700 1 $aVAN LOON, E. E.
700 1 $aVARGAS, R.
700 1 $aALBERTI, G.
700 1 $aAMBUS, P.
700 1 $aARAIN, M. A.
700 1 $aBEIER, C.
700 1 $aBENTLEY, L. P.
700 1 $aBORKEN, W.
700 1 $aBUCHMANN, N.
700 1 $aCOLLINS, S. L.
700 1 $aGATO, G. de
700 1 $aDUKES, J. S.
700 1 $aESCOLAR, C.
700 1 $aFAY, P.
700 1 $aGUIDOLOTTI, G.
700 1 $aHANSON, P. J.
700 1 $aKAHMEN, A.
700 1 $aKRÖEL-DULAY, G.
700 1 $aLADREITER-KNAUSS, T.
700 1 $aLARSEN, K. S.
700 1 $aLELLEI-KOVACS, E.
700 1 $aLEBRIJA-TREJOS, E.
700 1 $aMAESTRE, F. T.
700 1 $aMARHAN, S.
700 1 $aMARSHALL, M.
700 1 $aMEIR, P.
700 1 $aMIAO, Y.
700 1 $aMUHR, J.
700 1 $aNIKLAUS, P. A.
700 1 $aOGAYA, R.
700 1 $aPEÑUELAS, J.
700 1 $aPOLL, C.
700 1 $aRUSTAD, L. E.
700 1 $aSAVAGE, K.
700 1 $aSCHINDLBACHER, A.
700 1 $aSCHMIDT, I. K.
700 1 $aSMITH, A. R.
700 1 $aSOTTA, E. D.
700 1 $aSUSEELA, V.
700 1 $aTIETEMA, A.
700 1 $aVAN GESTEL, N.
700 1 $aVAN STRAATEN, O.
700 1 $aWAN, S.
700 1 $aWEBER, U.
700 1 $aJANSSENS, I. A.
773 $tBiogeosciences$gv. 11, n. 11, p. 2991-3013, 2014.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
23/05/2016 |
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Data da última atualização: |
08/02/2017 |
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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: |
SILVA, P. R. O.; JESUS, O. N. de; BRAGANÇA, C. A. D.; HADDAD, F.; AMORIM, E. P.; FERREIRA, C. F. |
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Afiliação: |
P.R.O. SILVA, UFRB; ONILDO NUNES DE JESUS, CNPMF; C.A.D. BRAGANÇA, UFRB; FERNANDO HADDAD, CNPMF; EDSON PERITO AMORIM, CNPMF; CLAUDIA FORTES FERREIRA, CNPMF. |
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Título: |
Development of a thematic collection of Musa spp accessions using SCAR markers for preventive breeding against Fusarium oxysporum f. sp cubense tropical race 4. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 15, n. 1, March, 2016. |
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ISSN: |
1676-5680 |
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DOI: |
DOI http://dx.doi.org/10.4238/gmr.15017765 |
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Idioma: |
Inglês |
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Conteúdo: |
Bananas are one of the most consumed fruits worldwide, but are affected by many pests and diseases. One of the most devastating diseases is Fusarium wilt, caused by Fusarium oxysporum f. sp cubense (Foc). Recently, Fusarium tropical race 4 (Foc TR4) has been causing irreparable damage, especially in Asia and Africa where it has devastated entire plantations, including areas with Cavendish, which is known to be resistant to Foc race 1. Although this race is not yet present in Brazil, results obtained by Embrapa in partnership with the University of Wageningen, The Netherlands, indicate that 100% of the cultivars used by Brazilian growers are susceptible to Foc TR 4. In our study, 276 banana accessions were screened with sequence characterized amplified region (SCAR) markers that have been linked to the resistance of Foc TR 4. Two SCAR primers were tested and the results revealed that SCAR ScaU1001 was efficient at discriminating accessions with possible resistance in 36.6% of the evaluated accessions. This is the first attempt to develop a thematic collection of possible Foc TR 4 resistant banana accessions in Brazil, which could be tested in Asian or African countries to validate markerassisted selection (MAS), and for use in the preventive breeding of the crop to safeguard our banana plantations against Foc TR 4. We believe that this is an important step towards the prevention of this devastating disease, especially considering that our banana plantations are at risk. |
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Thesagro: |
Banana. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02230naa a2200217 a 4500
001 2045474
005 2017-02-08
008 2016 bl uuuu u00u1 u #d
022 $a1676-5680
024 7 $aDOI http://dx.doi.org/10.4238/gmr.15017765$2DOI
100 1 $aSILVA, P. R. O.
245 $aDevelopment of a thematic collection of Musa spp accessions using SCAR markers for preventive breeding against Fusarium oxysporum f. sp cubense tropical race 4.$h[electronic resource]
260 $c2016
520 $aBananas are one of the most consumed fruits worldwide, but are affected by many pests and diseases. One of the most devastating diseases is Fusarium wilt, caused by Fusarium oxysporum f. sp cubense (Foc). Recently, Fusarium tropical race 4 (Foc TR4) has been causing irreparable damage, especially in Asia and Africa where it has devastated entire plantations, including areas with Cavendish, which is known to be resistant to Foc race 1. Although this race is not yet present in Brazil, results obtained by Embrapa in partnership with the University of Wageningen, The Netherlands, indicate that 100% of the cultivars used by Brazilian growers are susceptible to Foc TR 4. In our study, 276 banana accessions were screened with sequence characterized amplified region (SCAR) markers that have been linked to the resistance of Foc TR 4. Two SCAR primers were tested and the results revealed that SCAR ScaU1001 was efficient at discriminating accessions with possible resistance in 36.6% of the evaluated accessions. This is the first attempt to develop a thematic collection of possible Foc TR 4 resistant banana accessions in Brazil, which could be tested in Asian or African countries to validate markerassisted selection (MAS), and for use in the preventive breeding of the crop to safeguard our banana plantations against Foc TR 4. We believe that this is an important step towards the prevention of this devastating disease, especially considering that our banana plantations are at risk.
650 $aBanana
700 1 $aJESUS, O. N. de
700 1 $aBRAGANÇA, C. A. D.
700 1 $aHADDAD, F.
700 1 $aAMORIM, E. P.
700 1 $aFERREIRA, C. F.
773 $tGenetics and Molecular Research$gv. 15, n. 1, March, 2016.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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