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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
22/01/2018 |
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Data da última atualização: |
22/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CUNHA, A. C. da; MUSTIN, K.; SANTOS, E. S. dos; SANTOS, E. W. G. dos; GUEDES, M. C.; CUNHA, H. F. A.; ROSMAN, P. C. C.; STERNBERG, L. da S. L. |
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Afiliação: |
ALAN CAVALCANTI DA CUNHA, Unifap; KAREN MUSTIN, Bolsista CPAF-AP; ELDO SILVA DOS SANTOS, Unifap; EWERTON WANDERSON GONCALVES DOS SANTOS, Unifap; MARCELINO CARNEIRO GUEDES, CPAF-AP; HELENILZA FERREIRA ALBUQUERQUE CUNHA, Unifap; PAULO CESAR COLONNA ROSMAN, COPPE; LEONEL DA SILVEIRA LOBO STERNBERG, University of Miami. |
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Título: |
Hydrodynamics and seed dispersal in the lower Amazon. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Freshwater Biology, p. 1-9, 2017. |
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DOI: |
10.1111/fwb.12982 |
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Idioma: |
Inglês |
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Conteúdo: |
The transport of seeds by water, i.e. hydrochory, is a key mechanism of long-distance dispersal constrained by the attributes of the seed and hydrodynamics. In the freshwater Amazon estuary, river hydrodynamics are influenced by seasonal changes in precipitation and tidal cycles. It is not known to what extent a hydrodynamic model may be able to predict seed dispersal. Here we parameterised a simulation model (SisBaHia) to estimate maximum seed dispersal distances per tidal cycle, which were then compared with data from in situ seed dispersal experiments. The study was conducted along a 27-km stretch of a tributary of the Amazon estuary, using the seeds of a widely distributed riparian tree?Carapa guianensis (Meliaceae). Based on the simulation model, maximum potential seed dispersal distance was higher in the rainy season (c. 8.7 km) when compared with the dry season (5.6 km), for one tidal cycle (12 hr). The seeds of C. guianensis were dispersed further during the ebb than flood tide during the rainy season, the period of seed dispersal. Average dispersal distances observed in seed dispersal experiments conducted during the rainy season, and those predicted by SisBaHia for the same period were within the same order of magnitude. The results of this study confirm that the period of higher precipitation provides favourable hydrological conditions for hydrochory in the Amazon river-estuary complex. The fact that the time taken for the tide to fall is longer in relation to the time taken for it to rise also favours the arrival of the seeds in the main channel of the Amazon, thereby increasing the probability of long-distance dispersal events. MenosThe transport of seeds by water, i.e. hydrochory, is a key mechanism of long-distance dispersal constrained by the attributes of the seed and hydrodynamics. In the freshwater Amazon estuary, river hydrodynamics are influenced by seasonal changes in precipitation and tidal cycles. It is not known to what extent a hydrodynamic model may be able to predict seed dispersal. Here we parameterised a simulation model (SisBaHia) to estimate maximum seed dispersal distances per tidal cycle, which were then compared with data from in situ seed dispersal experiments. The study was conducted along a 27-km stretch of a tributary of the Amazon estuary, using the seeds of a widely distributed riparian tree?Carapa guianensis (Meliaceae). Based on the simulation model, maximum potential seed dispersal distance was higher in the rainy season (c. 8.7 km) when compared with the dry season (5.6 km), for one tidal cycle (12 hr). The seeds of C. guianensis were dispersed further during the ebb than flood tide during the rainy season, the period of seed dispersal. Average dispersal distances observed in seed dispersal experiments conducted during the rainy season, and those predicted by SisBaHia for the same period were within the same order of magnitude. The results of this study confirm that the period of higher precipitation provides favourable hydrological conditions for hydrochory in the Amazon river-estuary complex. The fact that the time taken for the tide to fall is longer in relation to the... Mostrar Tudo |
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Palavras-Chave: |
Long-distance dispersal; Modelling; Simulation; Tidal river. |
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Thesagro: |
Carapa guianensis. |
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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/171510/1/CPAF-AP-2017-Hydrodynamics-and-seed-dispersal.pdf
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Marc: |
LEADER 02429naa a2200277 a 4500
001 2086024
005 2018-01-22
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1111/fwb.12982$2DOI
100 1 $aCUNHA, A. C. da
245 $aHydrodynamics and seed dispersal in the lower Amazon.$h[electronic resource]
260 $c2017
520 $aThe transport of seeds by water, i.e. hydrochory, is a key mechanism of long-distance dispersal constrained by the attributes of the seed and hydrodynamics. In the freshwater Amazon estuary, river hydrodynamics are influenced by seasonal changes in precipitation and tidal cycles. It is not known to what extent a hydrodynamic model may be able to predict seed dispersal. Here we parameterised a simulation model (SisBaHia) to estimate maximum seed dispersal distances per tidal cycle, which were then compared with data from in situ seed dispersal experiments. The study was conducted along a 27-km stretch of a tributary of the Amazon estuary, using the seeds of a widely distributed riparian tree?Carapa guianensis (Meliaceae). Based on the simulation model, maximum potential seed dispersal distance was higher in the rainy season (c. 8.7 km) when compared with the dry season (5.6 km), for one tidal cycle (12 hr). The seeds of C. guianensis were dispersed further during the ebb than flood tide during the rainy season, the period of seed dispersal. Average dispersal distances observed in seed dispersal experiments conducted during the rainy season, and those predicted by SisBaHia for the same period were within the same order of magnitude. The results of this study confirm that the period of higher precipitation provides favourable hydrological conditions for hydrochory in the Amazon river-estuary complex. The fact that the time taken for the tide to fall is longer in relation to the time taken for it to rise also favours the arrival of the seeds in the main channel of the Amazon, thereby increasing the probability of long-distance dispersal events.
650 $aCarapa guianensis
653 $aLong-distance dispersal
653 $aModelling
653 $aSimulation
653 $aTidal river
700 1 $aMUSTIN, K.
700 1 $aSANTOS, E. S. dos
700 1 $aSANTOS, E. W. G. dos
700 1 $aGUEDES, M. C.
700 1 $aCUNHA, H. F. A.
700 1 $aROSMAN, P. C. C.
700 1 $aSTERNBERG, L. da S. L.
773 $tFreshwater Biology, p. 1-9, 2017.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
02/12/2016 |
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Data da última atualização: |
04/10/2017 |
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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: |
TONUCCI, L. B.; SANTOS, K. M. O. dos; FERREIRA, C. L. de L. F.; RIBEIRO, S. M. R.; OLIVEIRA, L. L. de; MARTINO, H. S. D. |
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Afiliação: |
Livia Bordalo Tonucci, UFV; KARINA MARIA OLBRICH DOS SANTOS, CTAA; Celia Lucia De Luces Fortes Ferreira, UFV; Sonia Machado Rocha Ribeiro, UFV; Leandro Licursi de Oliveira, UFV; Hercia Stampini Duarte Martino, UFV. |
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Título: |
Gut microbiota and probiotics: Focus on diabetes mellitus. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Critical Reviews in food Science and Nutrition, v. 57, n. 11, p. 2296-2309, 2017. |
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DOI: |
http://dx.doi.org/10.1080/10408398.2014.934438 |
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Idioma: |
Inglês |
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Conteúdo: |
The characterization of gut microbiota has become an important area of research in several clinical conditions, including type 2 diabetes (T2DM). Changes in the composition and/or metabolic activity of the gut microbiota can contribute to human health. Thus, this review discusses the effects of probiotics and gut microbiota on metabolic control in these individuals. Relevant studies were obtained from electronic databases such as PubMed/Medline and ISI Web of Science. The main probiotics used in these studies belonged to the genera Lactobacillus and Bifidobacterium. The authors found seven randomized placebocontrolled clinical trials and 13 experimental studies directly related to the effect of probiotics on metabolic control in the context of T2DM. The hypothesis that gut microbiota plays a role in the development of diabetes indicates an important beginning, and the potential of probiotics to prevent and reduce the severity of T2DM is better observed in animal studies. In clinical trials, the use of probiotics in glycemic control presented conflicting results, and only few studies have attempted to evaluate factors that justify metabolic changes, such as markers of oxidative stress, inflammation, and incretins. Thus, further research is needed to assess the effects of probiotics in the metabolism of diabetic individuals, as well as the main mechanisms involved in this complex relationship. |
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Palavras-Chave: |
Gut Microbiota; Type 2 Diabetes. |
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Thesaurus NAL: |
inflammation; oxidative stress; probiotics. |
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Categoria do assunto: |
Z Localizações Geográficas |
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Marc: |
LEADER 02202naa a2200253 a 4500
001 2057809
005 2017-10-04
008 2017 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1080/10408398.2014.934438$2DOI
100 1 $aTONUCCI, L. B.
245 $aGut microbiota and probiotics$bFocus on diabetes mellitus.$h[electronic resource]
260 $c2017
520 $aThe characterization of gut microbiota has become an important area of research in several clinical conditions, including type 2 diabetes (T2DM). Changes in the composition and/or metabolic activity of the gut microbiota can contribute to human health. Thus, this review discusses the effects of probiotics and gut microbiota on metabolic control in these individuals. Relevant studies were obtained from electronic databases such as PubMed/Medline and ISI Web of Science. The main probiotics used in these studies belonged to the genera Lactobacillus and Bifidobacterium. The authors found seven randomized placebocontrolled clinical trials and 13 experimental studies directly related to the effect of probiotics on metabolic control in the context of T2DM. The hypothesis that gut microbiota plays a role in the development of diabetes indicates an important beginning, and the potential of probiotics to prevent and reduce the severity of T2DM is better observed in animal studies. In clinical trials, the use of probiotics in glycemic control presented conflicting results, and only few studies have attempted to evaluate factors that justify metabolic changes, such as markers of oxidative stress, inflammation, and incretins. Thus, further research is needed to assess the effects of probiotics in the metabolism of diabetic individuals, as well as the main mechanisms involved in this complex relationship.
650 $ainflammation
650 $aoxidative stress
650 $aprobiotics
653 $aGut Microbiota
653 $aType 2 Diabetes
700 1 $aSANTOS, K. M. O. dos
700 1 $aFERREIRA, C. L. de L. F.
700 1 $aRIBEIRO, S. M. R.
700 1 $aOLIVEIRA, L. L. de
700 1 $aMARTINO, H. S. D.
773 $tCritical Reviews in food Science and Nutrition$gv. 57, n. 11, p. 2296-2309, 2017.
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Embrapa Agroindústria de Alimentos (CTAA) |
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