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See detailEcosystème-cadavre: approches chémo-écologiques
Dekeirsschieter, Jessica ULg; Haubruge, Eric ULg

Conference given outside the academic context (2009)

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See detailLes écosystèmes de demain: quelle biodiversité dans un monde anthropisé?
Monty, Arnaud ULg

Scientific conference (2013)

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See detailL’écotourisme
Vermeulen, Cédric ULg; Portier, B.

in Delvingt, W.; Vermeulen, Cédric (Eds.) Nazinga (2007)

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See detailEcotoxicological and pathological studies of common guillemots Uria aalge beached on the Belgian coast during six successive wintering periods (1989-90 to 1994-95)
Debacker, Virginie ULg; Holsbeek, Ludo; Tapia, German et al

in Diseases of Aquatic Organisms (1997), 29(3), 159-168

During 6 successive wintering periods, 727 common guillemots Uria aalge were recovered from Belgian beaches. One-third of the birds were already dead; the rest passed through rehabilitation centres where ... [more ▼]

During 6 successive wintering periods, 727 common guillemots Uria aalge were recovered from Belgian beaches. One-third of the birds were already dead; the rest passed through rehabilitation centres where they eventually died. All birds were monitored for general condition (body mass, fat reserves), eventual status of oiling and pathological changes (cachexia, acute hemorrhagic gastroenteropathy); 339 birds were sampled for trace metals (total and organic Hg, Cu, Zn, Fe, Cd) and PCB (polychlorinated biphenyl) analysis. Oiling is still a major cause of death for wintering pelagic seabirds: half of the birds showed signs of external or internal oiling, probably a still greater number of oiled birds never reach the shores. Although a low body mass can be considered a normal winter condition for wintering guillemots, pathology results showed that three-quarters of the studied animals were in a state of cachexia with emaciated pectoral muscle and lowered muscle lipid content. Elevated levels of Cu, Zn, Hg and PCBs were linked to the state of cachexia and may well represent an additional stress factor leading to the debilitation and death of part of the wintering guillemot population. [less ▲]

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See detailEcotoxicology inside the gut: impact of heavy metals on the mouse microbiome
Breton, Jérome; Massart, Sébastien ULg; Vandamme, P. et al

in BMC Pharmacology (2013), 14(62),

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See detailEcotoxicology of marine predators: Strategy and perspectives
Das, Krishna ULg

Scientific conference (2011, October 25)

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See detailEcotoxicology of Organic and Inorganic Pollutants in Chelonians. Marine Turtle Risk to Pollutant Exposure
Dyc, Christelle ULg

Doctoral thesis (2013)

Marine turtles are oviparous vertebrates subdivided in seven existing species widespread in most of the oceans. They are suffering from human activities and especially from fishery by-catch, egg ... [more ▼]

Marine turtles are oviparous vertebrates subdivided in seven existing species widespread in most of the oceans. They are suffering from human activities and especially from fishery by-catch, egg harvesting, adult poaching, degradation of their habitats, environmental pollution and climate change. While direct threats (e.g. fishery by-catch) are often less challenging to identify and predict, indirect threats associated with environmental pollution often induce more insidious effects that can take longer to manifest and be more significant and lasting. Understanding the marine turtle risks to pollutant exposure is critical because a) pollutants are persistent and ubiquitous in the environment, b) all the marine turtle species are listed on the Red List of Threatened Species by the IUCN and c) pollutants were indicated to adversely threaten the marine turtles’ survival, especially the developing individuals. Despite decades of investigations and evidences of significant pollutant threats, few data is still being available for marine turtles. The present study proposed to assess pollutant exposure in the green Chelonia mydas and hawksbill Eretmochelys imbricata marine turtles nesting in Guadeloupe (French West Indies FWI, Caribbean Sea). Trace elements (e.g. selenium, mercury and cadmium) and organohalogen pollutants OHP (e.g. polychlorobiphenyls PCBs and chlordecone) were determined in dermis collected from the nesting females and in their eggs. A broad range of pollutants was detected in these tissues among which chlordecone. This was quite interesting because of the past history of chlordecone in the FWI. Results suggested that the green and hawksbill marine turtles fed on contaminated foraging ground, accumulated chlordecone in their body and then transferred it into their eggs during the egg formation. Both Guadeloupean marine turtle species appeared less exposed to OHP and trace elements than other marine turtle populations, except for other green marine turtle colonies (i.e. trace elements). The developing embryo risks to pollutant exposure were evaluated as those for the Guadeloupean inhabitants that consume marine turtle eggs. Little threat may be expected for the Guadeloupean inhabitants while some pollutants may affect the marine turtle embryos’ survival of both species (i.e. p,p’-DDE, cadmium, mercury and selenium). The present study was not the first to arise concern about embryo risks to selenium exposure as suggested by previous reptilian studies including marine turtles. As part of the present study, the toxicokinetics and dynamics of selenium were thus approached under laboratory conditions by using the slider turtle Trachemys scripta as model candidate. Juvenile turtles dietary exposed to selenium effectively accumulated selenium in their tissues but appeared unaffected by the exposure. Indeed, their body condition and antioxidant system were unaffected over the feeding trial. This was unexpected since the dietary levels used in the present study were indicated to induce sublethal effects in birds and other reptilian species. Selenium toxicity was initiated by oxidative stress leading to unusual production of oxidant species such as reactive oxygenated species. Therefore, turtles could tolerate high selenium levels due to specific trait of life (e.g. ability to deal with oxygen introduction after anoxic conditions associated with hibernation and/or diving). It is challenging to transpose results obtained from laboratory animals exposed to controlled conditions to wild individuals exposed to many environmental factors, even if species are closely related. The development life-stage further greatly affects the sensitivity of individuals to pollutant exposure. Nevertheless, the green and hawksbill marine turtle embryos could also tolerate high selenium exposure. This would contradict the risk assessment conducted in the present study but would be possible considering the food habits of both marine turtle species. These species are feeding on seagrasses and sponges which may expose the marine turtles to natural toxic compounds. Consequently, they could have developed adaptive strategies to deal with toxics in response to pressure at their foraging ground. To date, more works are needed to better understand the metabolism of selenium in turtles as well as to properly determine toxic thresholds of selenium for marine turtles. Finally, nondestructive collection techniques were tested for their suitability in assessing the turtle exposure to pollutants in both field and laboratory conditions. Keratinized tissues (i.e. carapace and skin) were proposed as promising tools and should warrant further investigations in researches aiming at the conservation of marine turtles. The present study provides several firsts such as the first baseline levels of a) pollutants in green and hawksbill marine turtles nesting in an area not investigated yet (i.e. Guadeloupe), b) OHP in the marine turtle dermis, c) OHP in hawksbill turtle eggs and d) chlordecone in marine turtle tissues. The first toxicological data on e) selenium kinetics and dynamics were further provided in turtles. [less ▲]

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See detailEcoTransHy, Rapport final de conclusions
Andre, Jean; Brac, Jean; de Wolf, Daniel ULg et al

Report (2008)

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See detailEcoulement de l'eau dans les sols
Degre, Aurore ULg

Learning material (2010)

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See detailEcoute, bruit et environnement : une incursion dans l'anthropologie des sens
Colon, Paul-Louis ULg

in Uzance (2011), 1(1),

L’anthropologie des sens se constitue lors du grand renouvellement des années 1980. Le projet de cette nouvelle discipline consiste à comprendre comment chaque culture organise les facultés sensorielles ... [more ▼]

L’anthropologie des sens se constitue lors du grand renouvellement des années 1980. Le projet de cette nouvelle discipline consiste à comprendre comment chaque culture organise les facultés sensorielles humaines. Il nécessite, entre autres, de se détacher du primat occidental de la vision pour s’intéresser au sens dit mineurs. Dans ce contexte, cet article s’attache à l’étude du paysage sonore en Wallonie et en particulier à ce qui est considéré comme une « nuisance sonore ». Quel est le processus qui conduit à identifier un bruit comme une « nuisance sonore » ? Nous montrerons que la valeur attribuée à un bruit est le produit de l’histoire, à la fois personnelle et sociale, des désagréments associés à ce bruit. [less ▲]

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See detailEcouter le bruit, faire entendre la gêne
Colon, Paul-Louis ULg

in Communications (2012), (90), 95-107

Noise issues and ordinary listening have long been adressed separately in the social sciences. This paper argues in favor of the usefulness of an integrated approach to both, from the standpoint of an ... [more ▼]

Noise issues and ordinary listening have long been adressed separately in the social sciences. This paper argues in favor of the usefulness of an integrated approach to both, from the standpoint of an ethnographic investigation on the perception and management of sonic environment which was carried out in French-speaking Belgium. This heuristic approach – combining listening and noise – makes it possible to describe the process of when the feeling of annoyance comes about and the ability for annoyed people to express it. [less ▲]

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See detailLes écozonings... vers des zones d'activité économique durables
Van Der Kaa, Claire ULg; Brévers, Florence ULg; Dopagne, Claude ULg et al

Article for general public (2011)

Faced with the structural, functional and organisational weaknesses observed in economic activity zones in Wallonia, the will now exists to encourage these zones to evolve in the direction of a greater ... [more ▼]

Faced with the structural, functional and organisational weaknesses observed in economic activity zones in Wallonia, the will now exists to encourage these zones to evolve in the direction of a greater respect for the environment and en enhanced sustainability. [less ▲]

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See detailLes écrans de la transparence. Essai de définition sémio-pragmatique du discours télévisuel
Badir, Sémir ULg

in Réseaux : Revue Interdisciplinaire de Philosophie Morale et Politique (1994), 70-71-72

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See detailÉcrire (d')après. Sur la littérature "au second degré" et ses critiques
Saint-Amand, Denis ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2009)

Detailed reference viewed: 46 (15 ULg)
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See detailEcrire en deux langues. Remarques sur le mixage des écritures grecque et latine d'après les papyrus bilingues d'auteurs classiques
Rochette, Bruno ULg

in Scriptorium (1999), 53(2), 325-334

Quatre fragments des « Catilinaires » de Cicéron et dix de Virgile (un des « Georgiques » et neuf de l'« Énéide »), datant des 4e-6e s., nous renseignent sur la place et l'enseignement du latin dans l ... [more ▼]

Quatre fragments des « Catilinaires » de Cicéron et dix de Virgile (un des « Georgiques » et neuf de l'« Énéide »), datant des 4e-6e s., nous renseignent sur la place et l'enseignement du latin dans l'univers égyptien hellénophone. L'étude comparée des écritures grecque et latine (onciale, semi-onciale et cursive) semble confirmer l'hypothèse d'un procédé d'écriture propre aux textes bilingues, imaginé par les scribes pour favoriser l'apprentissage du latin. La familiarité des traducteurs et des utilisateurs de ces textes avec le vocabulaire juridique est également patente, mais le phénomène des éditions bilingues touche des milieux variés et devient ainsi une première étape vers la formation d'une écriture latine largement redevable au grec, dans un monde où le bilinguisme est la règle. [less ▲]

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See detailEcrire et dessiner en éveil scientifique: Un reflet des apprentissages et des potentialités des élèves
Giot, Bernadette ULg; Quittre, Valérie ULg

in Actes du 4e Congrès des chercheurs en Education, Namur, 21 et 22 mars 2006. (2006)

Detailed reference viewed: 22 (7 ULg)
See detailEcrire et réfléchir ensemble sur la langue
Schillings, Patricia ULg

Scientific conference (2013)

Detailed reference viewed: 10 (1 ULg)