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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
17/08/2011 |
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Data da última atualização: |
31/01/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NEILL, C.; CHAVES, J. E.; BIGGS, T.; DEEGAN, L. A.; ELSENBEER, H.; FIGUEIREDO, R. de O.; GERMER, S.; JOHNSON, M. S.; LEHMANN, J.; MARKEWITZ, D. |
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Afiliação: |
CHRISTOPHER NEILL, The Ecosystems Center; JOAQUIN E. CHAVES, The Ecosystems Center; TRENT BIGGS, San Diego State University; LINDA A. DEEGAN, The Ecosystems Center; HELMUT ELSENBEER, University of Potsdam; RICARDO DE OLIVEIRA FIGUEIREDO, CNPMA; SONJA GERMER, University of Potsdam; MARK S. JOHNSON, University of British Columbia; JOHANNES LEHMAN, Cornell University; DANIEL MARKEWITZ, University of Georgia. |
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Título: |
Runoff sources and land cover change in the Amazon: an end-member mixing analysis from small watersheds. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Biogeochemistry, Dordrecht, v. 105, n.1-3, p. 7-18, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The flowpaths by which water moves from watersheds to streams has important consequences for the runoff dynamics and biogeochemistry of surface waters in the Amazon Basin. The clearing of Amazon forest to cattle pasture has the potential to change runoff sources to streams by shifting runoff to more surficial flow pathways. We applied end-member mixing analysis (EMMA) to 10 small watersheds throughout the Amazon in which solute composition of streamwater and groundwater, overland flow, soil solution, throughfall and rainwater were measured, largely as part of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia. We found a range in the extent to which streamwater samples fell within the mixing space determined by potential flowpath endmembers, suggesting that some water sources to streams were not sampled. The contribution of overland flow as a source of stream flow was greater in pasture watersheds than in forest watersheds of comparable size. Increases in overland flow contribution to pasture streams ranged in some cases from 0% in forest to 27-28% in pasture and were broadly consistent with results from hydrometric sampling of Amazon forest and pasture watersheds that indicate 17- to 18-fold increase in the overland flow contribution to stream flow in pastures. In forest, overland flow was an important contribution to stream flow (45-57%) in ephemeral streams where flows were dominated by stormflow. Overland flow contribution to stream flow decreased in importance with increasing watershed area, from 21 to 57% in forest and 60?89% in pasture watersheds of less than 10 ha to 0% in forest and 27-28% in pastures in watersheds greater than 100 ha. Soil solution contributions to stream flow were similar across watershed area and groundwater inputs generally increased in proportion to decreases in overland flow. Application of EMMA across multiple watersheds indicated patterns across gradients of stream size and land cover that were consistent with patterns determined by detailed hydrometric sampling. MenosAbstract: The flowpaths by which water moves from watersheds to streams has important consequences for the runoff dynamics and biogeochemistry of surface waters in the Amazon Basin. The clearing of Amazon forest to cattle pasture has the potential to change runoff sources to streams by shifting runoff to more surficial flow pathways. We applied end-member mixing analysis (EMMA) to 10 small watersheds throughout the Amazon in which solute composition of streamwater and groundwater, overland flow, soil solution, throughfall and rainwater were measured, largely as part of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia. We found a range in the extent to which streamwater samples fell within the mixing space determined by potential flowpath endmembers, suggesting that some water sources to streams were not sampled. The contribution of overland flow as a source of stream flow was greater in pasture watersheds than in forest watersheds of comparable size. Increases in overland flow contribution to pasture streams ranged in some cases from 0% in forest to 27-28% in pasture and were broadly consistent with results from hydrometric sampling of Amazon forest and pasture watersheds that indicate 17- to 18-fold increase in the overland flow contribution to stream flow in pastures. In forest, overland flow was an important contribution to stream flow (45-57%) in ephemeral streams where flows were dominated by stormflow. Overland flow contribution to stream flow decreased in i... Mostrar Tudo |
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Palavras-Chave: |
Cattle pasture; Flowpaths; Principal components analysis. |
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Thesagro: |
Bacia hidrográfica; Desmatamento; Fluviometria; Impacto ambiental; Pastagem. |
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Thesaurus Nal: |
Deforestation; Overland flow; Runoff; Soil solution; Tropical pastures; Water flow. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03153naa a2200397 a 4500
001 1898089
005 2012-01-31
008 2011 bl uuuu u00u1 u #d
100 1 $aNEILL, C.
245 $aRunoff sources and land cover change in the Amazon$ban end-member mixing analysis from small watersheds.$h[electronic resource]
260 $c2011
520 $aAbstract: The flowpaths by which water moves from watersheds to streams has important consequences for the runoff dynamics and biogeochemistry of surface waters in the Amazon Basin. The clearing of Amazon forest to cattle pasture has the potential to change runoff sources to streams by shifting runoff to more surficial flow pathways. We applied end-member mixing analysis (EMMA) to 10 small watersheds throughout the Amazon in which solute composition of streamwater and groundwater, overland flow, soil solution, throughfall and rainwater were measured, largely as part of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia. We found a range in the extent to which streamwater samples fell within the mixing space determined by potential flowpath endmembers, suggesting that some water sources to streams were not sampled. The contribution of overland flow as a source of stream flow was greater in pasture watersheds than in forest watersheds of comparable size. Increases in overland flow contribution to pasture streams ranged in some cases from 0% in forest to 27-28% in pasture and were broadly consistent with results from hydrometric sampling of Amazon forest and pasture watersheds that indicate 17- to 18-fold increase in the overland flow contribution to stream flow in pastures. In forest, overland flow was an important contribution to stream flow (45-57%) in ephemeral streams where flows were dominated by stormflow. Overland flow contribution to stream flow decreased in importance with increasing watershed area, from 21 to 57% in forest and 60?89% in pasture watersheds of less than 10 ha to 0% in forest and 27-28% in pastures in watersheds greater than 100 ha. Soil solution contributions to stream flow were similar across watershed area and groundwater inputs generally increased in proportion to decreases in overland flow. Application of EMMA across multiple watersheds indicated patterns across gradients of stream size and land cover that were consistent with patterns determined by detailed hydrometric sampling.
650 $aDeforestation
650 $aOverland flow
650 $aRunoff
650 $aSoil solution
650 $aTropical pastures
650 $aWater flow
650 $aBacia hidrográfica
650 $aDesmatamento
650 $aFluviometria
650 $aImpacto ambiental
650 $aPastagem
653 $aCattle pasture
653 $aFlowpaths
653 $aPrincipal components analysis
700 1 $aCHAVES, J. E.
700 1 $aBIGGS, T.
700 1 $aDEEGAN, L. A.
700 1 $aELSENBEER, H.
700 1 $aFIGUEIREDO, R. de O.
700 1 $aGERMER, S.
700 1 $aJOHNSON, M. S.
700 1 $aLEHMANN, J.
700 1 $aMARKEWITZ, D.
773 $tBiogeochemistry, Dordrecht$gv. 105, n.1-3, p. 7-18, 2011.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
29/12/2015 |
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Data da última atualização: |
22/10/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
EIZENGA, G. C.; NEVES, P. C. F.; BRYANT, R. J.; AGRAMA, H. A.; MACKILL, D. J. |
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Afiliação: |
GEORGIA C. EIZENGA, USDA-ARS; PERICLES DE CARVALHO FERREIRA NEVES, CNPAF; ROLFE J. BRYANT, USDA-ARS; HESHAM A. AGRAMA, SULTAN QABOOS UNIVERSITY; DAVID J. MACKILL, UNIVERSITY OF CALIFORNIA, DAVIS. |
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Título: |
Evaluation of a M-202 3 Oryza nivara advanced backcross mapping population for seedling vigor, yield components and quality. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Euphytica, v. 208, n. 1, p. 157-171, Mar. 2016. |
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DOI: |
10.1007/s10681-015-1613-y |
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Idioma: |
Inglês |
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Conteúdo: |
Oryza nivara, the ancestral species of cultivated rice (O. sativa), has been the source of novel alleles for resistance to biotic and abiotic stress lost during domestication. Interspecific advanced backcross (ABC) populations permit the introgression of desirable alleles from the wild species into O. sativa and allow traits to be mapped to chromosomal regions by QTL mapping. An ABC population was developed by crossing M-202, a California medium grain, temperate japonica cultivar with O. nivara (IRGC100195). The population has 177 BC2F2:5 progeny lines and was evaluated for 17 traits including seedling vigor under cool temperature (mesocotyl, coleoptile, shoot and root lengths), agronomic (days to heading, plant height, culm angle, panicle type), yield components (panicles per plant, panicle length, florets and seeds per panicle, 100-seed weight) and quality [kernel length and width, apparent amylose content (AAC), alkali spreading value (ASV)]. Most exciting was that the O. nivara parent improved seedling vigor by increasing both the coleoptile and shoot lengths. Wild donor alleles increased the panicles per plant and seed weight, but M-202 alleles improved fertility. For one locus, the O. nivara alleles accounted for increased kernel length even though this parent had smaller seeds than M-202. The AAC mapped to the WAXY locus and ASV to the ALK locus, with most progeny being similar to M-202 for these quality traits. Select progeny lines could be useful for improving seedling vigor. This interspecific population is the first in the background of a U.S. temperate japonica rice cultivar. MenosOryza nivara, the ancestral species of cultivated rice (O. sativa), has been the source of novel alleles for resistance to biotic and abiotic stress lost during domestication. Interspecific advanced backcross (ABC) populations permit the introgression of desirable alleles from the wild species into O. sativa and allow traits to be mapped to chromosomal regions by QTL mapping. An ABC population was developed by crossing M-202, a California medium grain, temperate japonica cultivar with O. nivara (IRGC100195). The population has 177 BC2F2:5 progeny lines and was evaluated for 17 traits including seedling vigor under cool temperature (mesocotyl, coleoptile, shoot and root lengths), agronomic (days to heading, plant height, culm angle, panicle type), yield components (panicles per plant, panicle length, florets and seeds per panicle, 100-seed weight) and quality [kernel length and width, apparent amylose content (AAC), alkali spreading value (ASV)]. Most exciting was that the O. nivara parent improved seedling vigor by increasing both the coleoptile and shoot lengths. Wild donor alleles increased the panicles per plant and seed weight, but M-202 alleles improved fertility. For one locus, the O. nivara alleles accounted for increased kernel length even though this parent had smaller seeds than M-202. The AAC mapped to the WAXY locus and ASV to the ALK locus, with most progeny being similar to M-202 for these quality traits. Select progeny lines could be useful for improving seedl... Mostrar Tudo |
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Thesagro: |
Arroz; Melhoramento genético vegetal; Oryza Sativa. |
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Thesaurus NAL: |
Oryza nivara. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02330naa a2200229 a 4500
001 2032576
005 2019-10-22
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s10681-015-1613-y$2DOI
100 1 $aEIZENGA, G. C.
245 $aEvaluation of a M-202 3 Oryza nivara advanced backcross mapping population for seedling vigor, yield components and quality.$h[electronic resource]
260 $c2016
520 $aOryza nivara, the ancestral species of cultivated rice (O. sativa), has been the source of novel alleles for resistance to biotic and abiotic stress lost during domestication. Interspecific advanced backcross (ABC) populations permit the introgression of desirable alleles from the wild species into O. sativa and allow traits to be mapped to chromosomal regions by QTL mapping. An ABC population was developed by crossing M-202, a California medium grain, temperate japonica cultivar with O. nivara (IRGC100195). The population has 177 BC2F2:5 progeny lines and was evaluated for 17 traits including seedling vigor under cool temperature (mesocotyl, coleoptile, shoot and root lengths), agronomic (days to heading, plant height, culm angle, panicle type), yield components (panicles per plant, panicle length, florets and seeds per panicle, 100-seed weight) and quality [kernel length and width, apparent amylose content (AAC), alkali spreading value (ASV)]. Most exciting was that the O. nivara parent improved seedling vigor by increasing both the coleoptile and shoot lengths. Wild donor alleles increased the panicles per plant and seed weight, but M-202 alleles improved fertility. For one locus, the O. nivara alleles accounted for increased kernel length even though this parent had smaller seeds than M-202. The AAC mapped to the WAXY locus and ASV to the ALK locus, with most progeny being similar to M-202 for these quality traits. Select progeny lines could be useful for improving seedling vigor. This interspecific population is the first in the background of a U.S. temperate japonica rice cultivar.
650 $aOryza nivara
650 $aArroz
650 $aMelhoramento genético vegetal
650 $aOryza Sativa
700 1 $aNEVES, P. C. F.
700 1 $aBRYANT, R. J.
700 1 $aAGRAMA, H. A.
700 1 $aMACKILL, D. J.
773 $tEuphytica$gv. 208, n. 1, p. 157-171, Mar. 2016.
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