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See detailEvolution of dispersal traits along an invasion route in the wind-dispersed Senecio inaequidens (Asteraceae)
Monty, Arnaud ULiege; Mahy, Grégory ULiege

in Oikos (2010), 119

In introduced organisms, dispersal propensity is expected to increase during range expansion. This prediction is based on the assumption that phenotypic plasticity is low compared to genetic diversity ... [more ▼]

In introduced organisms, dispersal propensity is expected to increase during range expansion. This prediction is based on the assumption that phenotypic plasticity is low compared to genetic diversity, and an increase in dispersal can be counteracted by the Allee effect. Empirical evidence in support of these hypotheses is however lacking. The present study tested for evidence of differentiation in dispersal-related traits and the Allee effect in the wind-dispersed invasive Senecio inaequidens (Asteraceae). We collected capitula from individuals in ten field populations, along an invasion route including the original introduction site in southern France. In addition, we conducted a common garden experiment from field-collected seeds and obtained capitula from individuals representing the same ten field populations. We analysed phenotypic variation in dispersal traits between field and common garden environments as a function of the distance between populations and the introduction site. Our results revealed low levels of phenotypic differentiation among populations. However, significant clinal variation in dispersal traits was demonstrated in common garden plants representing the invasion route. In field populations, similar trends in dispersal-related traits and evidence of an Allee effect were not detected. In part, our results supported expectations of increased dispersal capacity with range expansion, and emphasized the contribution of phenotypic plasticity under natural conditions. [less ▲]

Detailed reference viewed: 96 (19 ULiège)
See detailEvolution of early Earth biosphere and implications for astrobiology
Javaux, Emmanuelle ULiege

Scientific conference (2007)

Detailed reference viewed: 12 (3 ULiège)
See detailEvolution of early eukaryotes
Javaux, Emmanuelle ULiege

Scientific conference (2006)

Detailed reference viewed: 2 (0 ULiège)
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See detailEvolution of early eukaryotes in Precambrian oceans
Javaux, Emmanuelle ULiege

in Gargaud, M.; Lopez-Gracia, P.; Martin, H. (Eds.) Origins and Evolution of Life: an astrobiological perspective (2011)

Detailed reference viewed: 134 (8 ULiège)
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See detailThe evolution of errors and violation descriptions in French Air Force accident reports : the impact of human factors education
Aslanides, Michèle; Valot, Claude; Nyssen, Anne-Sophie ULiege et al

in Human Factors And Aerospace Safety (2007), 6(1), 51-70

Detailed reference viewed: 83 (9 ULiège)
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See detailEvolution of faecal contamination and general hygiene in Belgian meat producing establishment
Ghafir, Y.; China, B.; Dierick, K. et al

Poster (2004, September 16)

Detailed reference viewed: 12 (1 ULiège)
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See detailEvolution of fast familiarity and novelty decisions in aging
Delhaye, Emma ULiege; Bastin, Christine ULiege; Moulin, Christopher et al

Poster (2017)

Detailed reference viewed: 21 (4 ULiège)
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See detailEvolution of floodplain sedimentation during the last millennia in the Ardenne Massif (Belgium)
Houbrechts, Geoffrey ULiege; Notebaert, Bastiaan; Verstraeten, Gert et al

Poster (2009, July)

In the Ardenne massif, several periods of increased sediment deposition have been identified during the last millennia. They can be correlated to increasing anthropogenic land use pressure. The majority ... [more ▼]

In the Ardenne massif, several periods of increased sediment deposition have been identified during the last millennia. They can be correlated to increasing anthropogenic land use pressure. The majority of the sediments found in floodplains were deposited in the last 4000 years, and in many cases even in the last 1000 years. In the Amblève catchment, the first increase in sediment deposition of the Holocene occurred during the Bronze Age (3200 BP), related to first deforestations and crop cultures in the area. Several organic depositions have occurred between 2700 BP and 1000 BP and probably indicate low anthropogenic pressures or more humid periods. From the 11th century onwards, there was an increase in sedimentation, and alluvial deposits contain more charcoal. A second important increase in sedimentation is observed in headwater catchments at the end of the 14th century, which can be related to the development of many iron factories. In the Ardenne massif, more than 300 iron factories existed between the 14th and the 19th century and about 20 ha of forest were cleared each year for the consumption of a refining forge or a blast furnace. Analysis of slag concentration produced in former factories and redistributed in the floodplain allows us to reconstruct the evolution of floodplains since the inception of the iron industries. The results show that not all floodplains in the Amblève catchment are equally sensitive to catchment disturbances. In the headwater stream (Chavanne river, 10-20 km²), about 80 cm of sediment has been deposited since the inception of the iron industries (towards 1540 AD). In the lower Lienne valley (100-150 km²), almost no sediment accumulation occurred in the floodplains after the beginning of iron melting (towards 1400 AD). This difference could be explained by the larger stream power of the Lienne river (100-120 W/m2 for Qb). [less ▲]

Detailed reference viewed: 13 (2 ULiège)
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See detailEvolution of food design: from recipe to formulation concept
Blecker, Christophe ULiege

Conference (2009, July)

Detailed reference viewed: 41 (6 ULiège)
See detailEvolution of galaxies - Astronomical observations -- I. Appenzeller et al.
Manfroid, Jean ULiege

in Ciel et Terre (1990), 106

Detailed reference viewed: 12 (0 ULiège)
See detailEvolution of Harmonia axyridis (Pallas) alkaloid protection during the year
Fischer, Christophe ULiege; Sibret, Virginie; Laurent, Pascal ULiege et al

Poster (2010, May 05)

Detailed reference viewed: 55 (14 ULiège)
See detailEvolution of Harmonia axyridis (Pallas) alkaloid protection during the year in relation with insect color
Fischer, Christophe ULiege; Sibret, Virginie; Laurent, Pascal ULiege et al

Conference (2010, June 02)

Detailed reference viewed: 64 (16 ULiège)
Peer Reviewed
See detailEvolution of host-plant interactions in specialist bees
Vanderplanck, Maryse ULiege; Wathelet, Bernard ULiege; Wattiez, Ruddy et al

Conference (2012)

Detailed reference viewed: 9 (1 ULiège)
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See detailThe evolution of inorganic chlorine above the Jungfraujoch station: an update.
Mahieu, Emmanuel ULiege; Duchatelet, Pierre ULiege; Zander, Rodolphe ULiege et al

in Zerefos, C. S. (Ed.) Proceedings of the 20th Quadrennial Ozone Symposium (2004)

Within the frame of the NDSC, the total vertical column abundances of HCl and ClONO2, by far the two most important inorganic chlorine reservoirs at northern mid-latitudes, have been further monitored ... [more ▼]

Within the frame of the NDSC, the total vertical column abundances of HCl and ClONO2, by far the two most important inorganic chlorine reservoirs at northern mid-latitudes, have been further monitored above the Jungfraujoch station (Swiss Alps, 46.5ºN, 8.0ºE, 3580m a.s.l.), by analyzing infrared solar absorption spectra recorded with very high-resolution Fourier spectrometers. The mean temporal evolution of the sum of their monthly mean abundance time series indicates that the total stratospheric inorganic chlorine loading (Cly) has decreased slowly (-0.7+/-0.3%/yr, 1-sigma) since it peaked in late 1996, at the limit of being statistically significant at the 2-sigma level. Comparison with model calculations and with the evolution of surface total organic chlorine will also be discussed. [less ▲]

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See detailEvolution of insulin sensitivity and its variability in out of hospital cardiac arrest (OHCA) patients treated with hypothermia.
Sah Pri, Azurahisham; Chase, James G.; Pretty, Christopher G. et al

in Critical care (London, England) (2014), 18(5), 586

IntroductionTherapeutic hypothermia (TH) is often used to treat out of hospital cardiac arrest (OHCA) patients who also often simultaneously receive insulin for stress-induced hyperglycaemia. However, the ... [more ▼]

IntroductionTherapeutic hypothermia (TH) is often used to treat out of hospital cardiac arrest (OHCA) patients who also often simultaneously receive insulin for stress-induced hyperglycaemia. However, the impact of TH on systemic metabolism and insulin resistance in critical illness is unknown. This study analyses the impact of TH on metabolism, including the evolution of insulin sensitivity (SI) and its variability, in patients with coma after OHCA.MethodsThis study uses a clinically validated, model-based measure of SI. Insulin sensitivity was identified hourly using retrospective data from 200 post-cardiac arrest patients (8,522 hours) treated with TH, shortly after admission to the Intensive Care Unit (ICU). Blood glucose and body temperature readings were taken every one to two hours. Data were divided into three periods: 1) cool (T <35 degrees C); 2) an idle period of two hours as normothermia was re-established; and 3) warm (T >37 degrees C). A maximum of 24 hours each for the cool and warm periods were considered. The impact of each condition on SI is analysed per cohort and per patient for both level and hour-to-hour variability, between periods and in 6-hour blocks.ResultsCohort and per patient median SI levels increase consistently by 35% to 70% and 26% to 59% (P <0.001) respectively from cool to warm. Conversely, cohort and per patient SI variability decreased by 11.1% to 33.6% (P <0.001) for the first 12 hours of treatment. However, SI variability increases between the 18th and 30th hours over the cool-warm transition, before continuing to decrease afterward.ConclusionsOCHA patients treated with TH have significantly lower and more variable SI during the cool period, compared to the later warm period. As treatment continues, SI level rises, and variability decreases consistently except for a large, significant increase during the cool-warm transition. These results demonstrate increased resistance to insulin during mild induced hypothermia. Our study might have important implications for glycaemic control during targeted temperature management. [less ▲]

Detailed reference viewed: 22 (0 ULiège)
See detailEvolution of laboratories in food microbiology in Belgium
Ghafir, Y.; Daube, Georges ULiege; Denys, J. et al

Poster (1997, August 24)

Detailed reference viewed: 5 (1 ULiège)
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See detailEvolution of land use-change modeling: routes of different schools of knowledge
Azadi, Hossein; Barati, Ali Akbar; Rafiaani, Parisa et al

in Landscape and Ecological Engineering (2016), (12 (December 2016)), 1-14

Although much has been published on land use-change models (LUCMs), no study has comprehensively dealt with the evolution of land use models based on schools of knowledge. The primary objective of this ... [more ▼]

Although much has been published on land use-change models (LUCMs), no study has comprehensively dealt with the evolution of land use models based on schools of knowledge. The primary objective of this paper is an explanation of the progress and growth of LUCMs concerning their main ontological, epistemological, and methodological origins. Five main paradigms, i.e., positivism, post-positivism, constructivism, participatory, and pragmatism approaches, are discussed in order to assess the current orientations of LUCMs. Given the complexities of LUCM components, the study concludes that one paradigm cannot adequately address all methodological aspects. Accordingly, it is necessary to combine quantitative and qualitative paradigms to create mixed-method approaches within a systemic framework. Such systemic approaches could shape the most probable future generations of LUCMs, which would be able to cope with the complexity of various subsystems, including biophysical and socioeconomic ones. [less ▲]

Detailed reference viewed: 36 (3 ULiège)
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See detail- Evolution of lipoxygenase activity during storage of potato tubers (Solanum tuberosum L. cv. Bintje)
Fauconnier, Marie-Laure ULiege; Koto, N.; Hoyaux, P. et al

in Bulletin de la Société des Sciences de Liège (1999), 68(5-6), 319

Detailed reference viewed: 11 (3 ULiège)
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See detailEvolution of livelihood strategy and income of the households in the coastal sandy area of the Central region, Vietnam : the case of Thua Thien Hue Province during period 2003-2008
Nguyen Dang, Hao; Lebailly, Philippe ULiege

Conference (2011)

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of ... [more ▼]

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of households in the Coastal Sandy Zone of Thua Thien Hue Province. Findings indicated that livelihood strategies are very dynamic and considerable difference between the wealth categories of households and among the study sites. Although agriculture –based strategy is one of the most popular among the livelihood strategies there are considerable changes. Thanks to more specialization on livestock - non-farm business – aquaculture the better-off category has increased rapidly their income during 2003-2008 period. By contrast, due to more dependence on food crop, wage work and migration, income of the poor slowly improved at the same period. These findings implicate that in the context of rural development, support policies introduced by government have positively influenced on household income, but these general policies cannot meet the development needs from various locations as well as different household categories because there is marked difference in livelihood assets, human source, landholding, financial and social capitals in particular. [less ▲]

Detailed reference viewed: 54 (7 ULiège)