Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 13
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Calculating germination measurements and organizing spreadsheets Rev. Bras. Bot.
Ranal,Marli A.; Santana,Denise Garcia de; Ferreira,Wanessa Resende; Mendes-Rodrigues,Clesnan.
With the objective to minimize difficulties for beginners we are proposing the use of a conventional spreadsheet for the calculations of the main germination (or emergence) measurements, the organization of the final data for the statistical analysis and some electronic commands involved in these steps.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Germination rate; Germination time; Seed germination; Synchrony; Uncertainty.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400022
Imagem não selecionada

Imprime registro no formato completo
Comparação de dois métodos de avaliação da fenologia de plantas, sua interpretação e representação Rev. Bras. Bot.
BENCKE,CINARA S.C.; MORELLATO,L. PATRÍCIA C..
Este trabalho compara dois métodos de avaliação fenológica e sua representação gráfica. O estudo foi desenvolvido no Núcleo Picinguaba, Ubatuba, Estado de São Paulo (23º22' S e 44º48' W), em três formações florestais: floresta de restinga, floresta de planície e floresta de encosta. A floração, frutificação, queda de folhas e brotamento foram estimados mensalmente para cada indivíduo arbóreo, durante 18 meses. Foram comparados: i) percentual de intensidade de Fournier ou índice de intensidade: escala intervalar de cinco categorias de 0 a 4, com intervalo de 25% entre classes; e ii) índice de atividade ou porcentagem de indivíduos. O índice de atividade e o percentual de intensidade de Fournier forneceram informações distintas e complementares, facilitando...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic forest; Phenology; Methods; Tropical forest; Synchrony.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300003
Imagem não selecionada

Imprime registro no formato completo
Effects of environmental conditions associated to the cardinal orientation on the reproductive phenology of the cerrado savanna tree Xylopia aromatica (Annonaceae) Anais da ABC (AABC)
Camargo,Maria Gabriela G.; Souza,Regina M.; Reys,Paula; Morellato,Leonor P.C..
The Brazilian cerrado has undergone an intense process of fragmentation, which leads to an increase in the number of remnants exposed to edge effects and associated changes on environmental conditions that may affect the phenology of plants. This study aimed to verify whether the reproductive phenology of Xylopia aromatica (Lam.) Mart. (Annonaceae) differs under different light conditions in a cerrado sensu stricto (a woody savanna) of southeastern Brazil. We compared the reproductive phenology of X. aromatica trees distributed on east and south cardinal faces of the cerrado during monthly observations, from January 2005 to December 2008. The east face had a higher light incidence, higher temperatures and canopy openness in relation to south face. X....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado savanna; Edge effect; Fragmentation; Reproductive phenology; Synchrony.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300019
Imagem não selecionada

Imprime registro no formato completo
Environmentally driven synchronies of Mediterranean cephalopod populations ArchiMer
Keller, Stefanie; Quetglas, Antoni; Puerta, Patricia; Bitetto, Isabella; Casciaro, Loredana; Cuccu, Danila; Esteban, Antonio; Garcia, Cristina; Garofalo, Germana; Guijarro, Beatriz; Josephides, Marios; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Manfredi, Chiara; Marceta, Bojan; Micallef, Reno; Peristeraki, Panagiota; Relini, Giulio; Sartor, Paolo; Spedicato, Maria Teresa; Tserpes, George; Hidalgo, Manuel.
The Mediterranean Sea is characterized by large scale gradients of temperature, productivity and salinity, in addition to pronounced mesoscale differences. Such a heterogeneous system is expected to shape the population dynamics of marine species. On the other hand, prevailing environmental and climatic conditions at whole basin scale may force spatially distant populations to fluctuate in synchrony. Cephalopods are excellent case studies to test these hypotheses owing to their high sensitivity to environmental conditions. Data of two cephalopod species with contrasting life histories (benthic octopus vs nectobenthic squid), obtained from scientific surveys carried out throughout the Mediterranean during the last 20 years were analyzed. The objectives of...
Tipo: Text Palavras-chave: Cephalopods; Mediterranean; MEDITS; Dynamic factor analysis; Synchrony; Octopus vulgaris; Illex coindetii.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00371/48207/48320.pdf
Imagem não selecionada

Imprime registro no formato completo
Long distance communication in the human brain: timing constraints for inter-hemispheric synchrony and the origin of brain lateralization Biol. Res.
ABOITIZ,FRANCISCO; LÓPEZ,JAVIER; MONTIEL,JUAN.
Analysis of corpus callosum fiber composition reveals that inter-hemispheric transmission time may put constraints on the development of inter-hemispheric synchronic ensembles, especially in species with large brains like humans. In order to overcome this limitation, a subset of large-diameter callosal fibers are specialized for fast inter-hemispheric transmission, particularly in large-brained species. Nevertheless, the constraints on fast inter-hemispheric communication in large-brained species can somehow contribute to the development of ipsilateral, intrahemispheric networks, which might promote the development of brain lateralization.
Tipo: Journal article Palavras-chave: Axon; Brain lateralization; Corpus callosum; Inter-hemispheric transfer; Synchrony; Vision.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000100007
Imagem não selecionada

Imprime registro no formato completo
Long term synchronous trends in the recruitment of the North Eastern Atlantic fish populations related to climate change and exploitation. ArchiMer
Brunel, Thomas; Boucher, Jean.
Synchrony in population fluctuations have commonly been observed among a variety of species. They are generally attributed to the effect of common environmental forcings on population dynamics. Here, we investigate long term synchrony in the recruitment variations of the North East Atlantic fish populations. A PCA (principal component analysis) was performed to extract the main patterns of variation. The most significant one reflects the synchronous decrease of the recruitment for the majority of gadoids populations, in the Baltic Sea, Kattegat, North Sea, Irish Sea and West of Scotland. The inverse pattern was observed for half of the herring populations. Plaice populations also exhibit synchronous recruitment trends, characterised by strong year classes...
Tipo: Text Palavras-chave: Synchrony; Regime shift; Recruitment variations; North Eastern Atlantic; Climate change.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-1145.pdf
Imagem não selecionada

Imprime registro no formato completo
Peristenus varisae spec. nov. (Hymenoptera: Braconidae) parasitizing the European tarnished plant bug, Lygus rugulipennis Poppius (Heteroptera: Miridae) Naturalis
Varis, A.-L.; Achterberg, C. van.
Nymphs and adults of Lygus species, mainly L. rugulipennis Poppius were collected from wheat fields in southern Finland, near Helsinki. The parasitization rate of braconid species was determined by dissection of the hosts. Parasitoids were reared from separate samples from the same fields.The parasitization rate was low, the maximum percentage occurring during the season, examined in 10-day periods, was 14%. All nymphal instars, except the first one, were found to be parasitized; the mean varied from 3% (third instar) to 6.5% (fourth instar). In adult hosts the mean parasitization rate was 2% in males and 4% in females. The percentage of parasitization in both nymphs and adults was higher in wheat bordering fields with a mixture of field bean and oats or...
Tipo: Article / Letter to the editor Palavras-chave: Hymenoptera; Braconidae; Euphorinae; Peristenus varisae; New species; Peristenus relictus syn. nov.; Finland; Norway; Native parasitoid; Habitat structure; Synchrony; Heteroptera; Miridae; Lygus rugulipennis; 42.75.
Ano: 2001 URL: http://www.repository.naturalis.nl/record/217450
Imagem não selecionada

Imprime registro no formato completo
Phenodynamics of five orchids species growing on rock outcrops in the Chapada Diamantina Mountains in northeastern Brazil Acta Botanica
Santana,Karoline Coutinho de; Souza,Isys Mascarenhas; Miranda,Lia d'Afonsêca Pedreira de; Funch,Ligia Silveira.
ABSTRACT We evaluated the vegetative and reproductive phenological patterns of the orchids Cattleya elongata, Cyrtopodium aliciae, Epidendrum orchidiflorum, Epistephium lucidum, and Sobralia liliastrum (Orchidaceae) growing on sandstone outcrops in the Chapada Diamantina Mountains in northeastern Brazil. Phenological events were associated with abiotic factors, leaf longevity, life form, plant growth pattern, and pollination syndrome. Phenological observations were made for 18 months and followed the phenophases of: stem/pseudobulb emission, leaf flush, leaf fall, flowering, immature fruit and mature fruit. Seasonality, synchrony, and correlations between phenophases and environmental variables were tested. The orchid species demonstrated aseasonal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Campo rupestre; Flowering overlap; Photoperiod; Seasonality; Synchrony.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300508
Imagem não selecionada

Imprime registro no formato completo
Resource use peak dates distract from real planetary limits Ecology and Society
O'Sullivan, Jane N.; School of Agriculture and Food Sciences, The University of Queensland; j.osullivan@uq.edu.au.
Tipo: Peer-Reviewed Insight Palavras-chave: Limits to growth; Peak-rate year; Synchrony.
Ano: 2015
Imagem não selecionada

Imprime registro no formato completo
Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing Biol. Res.
AYLWIN,MARÍA DE LA LUZ; DÍAZ,EUGENIA; MALDONADO,PEDRO E.
Odor perception depends on the odorant-evoked changes on Mitral/Tufted cell firing pattern within the olfactory bulb (OB). The OB exhibits a significant "ongoing" or spontaneous activity in the absence of sensory stimulation. We characterized this ongoing activity by simultaneously recording several single neurons in the mitral cell layer (MCL) of anesthetized rats and determined the extent of synchrony and oscillations under nasal and tracheal breathing. We recorded 115 neurons and found no significant differences in the mean firing rates between both breathing conditions. Surprisingly, nearly all single units exhibited a long refractory period averaging 14.4 ms during nasal respiration that was not different under tracheal breathing. We found a small...
Tipo: Journal article Palavras-chave: Coding; Tetrodes; Spikes; Ongoing activity; Synchrony.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100003
Imagem não selecionada

Imprime registro no formato completo
Synchronized peak-rate years of global resources use Ecology and Society
Seppelt, Ralf; UFZ - Helmholtz Centre for Environmental Research, Department Computational Landscape Ecology; iDiv - German Centre for Integrative Biodiversity Research; Institute of Geoscience & Geography, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; ralf.seppelt@ufz.de; Manceur, Ameur M.; UFZ - Helmholtz Centre for Environmental Research, Department Computational Landscape Ecology; UFZ - Helmholtz Centre for Environmental Research, Department Community Ecology; ameur.manceur@ufz.de; Liu, Jianguo; Center for Systems Integration and Sustainability, Michigan State University; liuji@msu.edu; Fenichel, Eli P.; Yale School of Forestry and Environmental Studies, Yale University; eli.fenichel@yale.edu; Klotz, Stefan; UFZ - Helmholtz Centre for Environmental Research, Department of Community Ecology; iDiv - German Centre for Integrative Biodiversity Research; Stefan.Klotz@ufz.de.
Many separate studies have estimated the year of peak, or maximum, rate of using an individual resource such as oil. However, no study has estimated the year of peak rate for multiple resources and investigated the relationships among them. We exploit time series on the appropriation of 27 global renewable and nonrenewable resources. We found 21 resources experienced a peak-rate year, and for 20 resources the peak-rate years occurred between 1960-2010, a narrow time window in the long human history. Whereas 4 of 7 nonrenewable resources show no peak-rate year, conversion to cropland and 18 of the 20 renewable resources have passed their peak rate of appropriation. To test the hypothesis that peak-rate years are synchronized, i.e., occur at approximately...
Tipo: Peer-Reviewed Reports Palavras-chave: Limits to growth; Peak-rate year; Synchrony.
Ano: 2014
Imagem não selecionada

Imprime registro no formato completo
Synchrony of peak-rate years suggests challenges to sustainable development: a response to O’Sullivan (2015) Ecology and Society
Seppelt, Ralf; UFZ - Helmholtz Centre for Environmental Research, Department Computational Landscape Ecology, Germany; iDiv - German Centre for Integrative Biodiversity Research, Germany; Institute of Geoscience & Geography, Martin-Luther-University Halle-Wittenberg, Germany; ralf.seppelt@ufz.de; Manceur, Ameur M.; UFZ - Helmholtz Centre for Environmental Research, Department Computational Landscape Ecology, Germany; UFZ - Helmholtz Centre for Environmental Research, Department Community Ecology, Germany; ameur.manceur@ufz.de; Liu, Jianguo; Center for Systems Integration and Sustainability, Michigan State University, USA; liuji@msu.edu; Fenichel, Eli P.; Yale School of Forestry and Environmental Studies, Yale University, USA; eli.fenichel@yale.edu; Klotz, Stefan; iDiv - German Centre for Integrative Biodiversity Research, Germany; UFZ - Helmholtz Centre for Environmental Research, Department Community Ecology, Germany ; Stefan.Klotz@ufz.de.
Tipo: Peer-Reviewed article Palavras-chave: Limits to growth; Peak-rate year; Synchrony.
Ano: 2015
Imagem não selecionada

Imprime registro no formato completo
What we see is how we are: New paradigms in visual research Biol. Res.
MALDONADO A,PEDRO.
As most sensory modalities, the visual system needs to deal with very fast changes in the environment. Instead of processing all sensory stimuli, the brain is able to construct a perceptual experience by combining selected sensory input with an ongoing internal activity. Thus, the study of visual perception needs to be approached by examining not only the physical properties of stimuli, but also the brain's ongoing dynamical states onto which these perturbations are imposed. At least three different models account for this internal dynamics. One model is based on cardinal cells where the activity of few cells by itself constitutes the neuronal correlate of perception, while a second model is based on a population coding that states that the neuronal...
Tipo: Journal article Palavras-chave: Perception; Synchrony; Neural coding.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500006
Registros recuperados: 13
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional