|
|
|
| Registros recuperados: 13 | |
|
| |
|
|
| 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 |
|
| |
|
|
| 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 |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 | |
|
|
|
