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See detailEcosocialisme ou barbarie. Une critique moderne du capitalisme
Sarkar, Saral; Kern, Bruno; Letawe, Céline ULiege

Book published by Initiative Ökosozialismus (2011)

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See detailEcosystem disturbances: an opportunity for biodiversity persistence
Patiny, Sébastien; Francis, Frédéric ULiege; Haubruge, Eric ULiege et al

in Abstract book (2001)

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See detailEcosystem model (MODECOGeL) of the Ligurian Sea revisited. Seasonal and interannual variability due to atmospheric forcing
Lacroix, Geneviève; Grégoire, Marilaure ULiege

in Journal of Marine Systems (2002), 37(4), 229-258

A one-dimensional coupled hydrodynamical–biological model, MODe`le d’ECOsyste`me du G.H.E.R. et du L.O.V. (MODECOGeL), of the water column is developed and applied to the Ligurian Sea (North Western ... [more ▼]

A one-dimensional coupled hydrodynamical–biological model, MODe`le d’ECOsyste`me du G.H.E.R. et du L.O.V. (MODECOGeL), of the water column is developed and applied to the Ligurian Sea (North Western Mediterranean). It is an extended and improved version of the model presented by Lacroix and Nival [J. Mar. Syst. 16 (1998) 23]. The hydrodynamic model is a 1D version of the 3D turbulent closure G.H.E.R. model, which takes into account momentum and heat surface fluxes computed from a real meteorological data set. The ecosystem model is defined by a nitrogen cycle described by 12 biological state variables including several plankton size classes and an explicit description of the bacterial loop. One data set coming from the FRONTAL missions is used to initialise and validate the model. To assess the impact of the interannual variability of the meteorological conditions on the ecosystem dynamics, the coupled model is run with 4-year real meteorological conditions (October 1984–September 1988). The model estimated percentages of the interannual variability of the annual mean biomass of phytoplankton, zooplankton and bacteria respectively of 31.0%, 16.2% and 16.3%. The ontribution of the zooplankton related to the total plankton biomass (phytoplankton, zooplankton and bacteria) has been found to be the most sensitive to the meteorological conditions variations (21%), followed by the phytoplankton (12%) and finally, by the bacteria (5%). The model estimated percentages of interannual variability of the annual gross primary production, the annual mean f-ratio and the annual bacterial production respectively of 27.9%, 18.5% and 13.4% although the interannual variability of the real winds conditions is only of 11.3%. Due to the more windy and less sunny conditions prevailing during the years ‘‘1985–1986’’ and ‘‘1986–1987’’, the annual primary production was found higher than during the years ‘‘1984–1985’’ and ‘‘1987–1988’’. The bacterial production is always greater than the primary production, showing the importance of the bacteria in such an oligotrophic environment. On a seasonal scale, the highest interannual variability of the primary production and the f-ratio is found in spring like for the wind intensity. [less ▲]

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See detailEcosystem response to the atmospheric forcing in the Ligurian Sea in 1997-1999.
Lacroix, Geneviève; Nezlin, Nicolay; Djenidi, Salim ULiege

in Proceedings of the 36th CIESM Congress (2001)

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See detailEcosystem Services and Agriculture
Boeraeve, Fanny ULiege

Diverse speeche and writing (2014)

Detailed reference viewed: 57 (17 ULiège)
See detailEcosystem services in mixed forests and monocultures: comparing stakeholders’ perceptions and scientific knowledge
Carnol, Monique ULiege; Branquart, Etienne; Muys, Bart et al

Conference (2010, March)

This study examines the common ground between current scientific knowledge and stakeholders’ perception of ecosystem services in mixed forests versus monocultures. An enquiry was performed within the ... [more ▼]

This study examines the common ground between current scientific knowledge and stakeholders’ perception of ecosystem services in mixed forests versus monocultures. An enquiry was performed within the frame of the project FORBIO aiming at the ‘Assessment of the effects of tree species BIOdiversity on FORest ecosystem functioning’ (http://forbio.biodiversity.be). The objective of this enquiry was to confront the perception of the influence of mixed species stands on ecosystem services in Belgium with actual scientific knowledge. The target groups were forest managers, users and scientists. As a general frame for the questionnaire, the ‘Millenium Ecosystem Assessment’, assessing the consequences of ecosystem change for human well-being, was selected. Respondents were asked to express their degree of agreement with statements related to the provisioning (production/quality, financial return), supporting (biodiversity, nutrient cycling, resistance), regulating (climate, air, soil, water) and cultural (aesthetics, recreation) ecosystem services, comparing mixed species to pure stands. Other questions addressed management objectives and the general profile of participants. The web-based questionnaires (SurveyMonkey) were established in Flemish and in French and invitations to respond were distributed by e-mail among key contact persons of forestry/nature associations, forest managers and scientists. After one month, a total of 142 and 228 responses were collected for the questionnaire in Flemish and in French, respectively. In this paper, we summarize main results by analyzing the profile of respondents and describing their perception of forest ecosystem services. Through the confrontation of this perception with the current scientific knowledge and through the identification of established scientific facts unknown to the general public, we identify gaps in scientific knowledge and ways of improving communication between scientists and managers. [less ▲]

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See detailEcosystem services in mixed forests and monocultures: comparing stakeholders’ perceptions and scientific knowledge
Carnol, Monique ULiege; Branquart, Etienne; Muys, Bart et al

in Book of Abstacts, IUFRO 7.01 Conference: Adaptation of Forest Ecosystems to Air Pollution and Climate Change, Antalya 2010 (2010)

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See detailEcosystem services in Wallonie ... What's up?
Maebe, Laura ULiege; Pipart, Nathalie; Dendoncker, Nicolas et al

Poster (2016, December 13)

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See detailEcosystem services in Wallonie ... What's up?
Maebe, Laura ULiege; Nathalie, Pipart; Brogna, Delphine et al

Poster (2016, September 20)

In Wallonia, a growing amount of projects on ecosystem services (ES) are conducted. These projects implement the ES concept at different spatial scales (ranging from the country scale to the plot scale ... [more ▼]

In Wallonia, a growing amount of projects on ecosystem services (ES) are conducted. These projects implement the ES concept at different spatial scales (ranging from the country scale to the plot scale), focus on some particular ES or consider all of them and finally, rely on one or multiple valuation types (i.e. biophysical, social and economic). With their multiple dimensions they feed each other with reflexions and methods. The aim of the stand is to give an overview of these ongoing projects taking place in Wallonia. Their similarities and common objectives will be highlighted on posters while their specificities will be presented by means of games, activities, quiz, etc. We hope to stimulate discussions and debates on our methods and results, to foster networking and knowledge exchange. Hereunder, we give a short overview of these projects to give hints on the diversity addressed by our stand. At the Belgian scale, BELBEES, a project funded by BELSPO, aims to identify the factors responsible for the decline of wild bees. Different hypotheses are tested, including the impact of land-use changes and the reduction of floral resources availability at geographical and temporal scales. The results will allow tracking historical community-level changes in pollination service at a biogeographical scale. Such initiative is a step forward in the perspective of ecosystem service mapping. In Wallonia, various projects on ES are underway: Wal-ES, a federating platform between the Walloon administrations and the scientists, aims to create and disseminate decision support tools based on the ecosystem services concept. In order to build the common core for these tools, Wal-ES defines a conceptual framework, an integrated ecosystem services valuation framework and a database regrouping all the information needed to assess ES in Wallonia. This platform helps to conduct a practical application of its integrated ES valuation framework to land planning at a local scale. This application aims to define a methodology for impact assessment of land-consolidation plans based on ES while testing it on a case study covering three municipalities in Wallonia. LIFE IN QUARRIES aims to develop biodiversity and ecosystem services in Walloon active quarries. One of its actions is the assessment and the monitoring of ES provided by a quarry regarding the restoration, maintenance and management of the nature undertaken during the project. BIOECOSYS project is focused on qualitative and quantitative assessment of ecosystem services provided by grasslands according to their management and their territorial context. The field study aims to determine production services under different soils and climatic conditions while the goal of the regional study is the mapping of several ES (production and regulation services). Other projects focus on a more regional or local scale: The first one studies the impact of forest cover on regulating services at the regional scale. This study investigates the impact of forest cover on hydrological services (i.e. water supply, water damage mitigation) in terms of quantity, timing and quality. The methods studying the impact of forest cover on water quality and carbon storage regulation service will be presented as well as the results of the impact of forest cover on the quantity and timing aspects. Secondly, a PhD project is looking at sown wildflower strips in agricultural fields. In the project, it is tested whether increasing the functional diversity of the flower mixtures used in wildflower strips can be a tool to optimize pollination and biodiversity support services. Another PhD research project is underway, willing to explore the relationships between biodiversity, functional diversity and the delivery of ecosystem services (pest control and pollination) in agricultural landscapes. This project aims at identifying the role of landscape and its ecological infrastructures (mainly Agro-Environment Schemes) on the species and functional traits composition of different arthropods assemblages. We will then link these diversity patterns to the provisioning of the ecosystem services of interest. Ongoing work also addresses agricultural practices, by analysing the contribution of agroecological farming systems to the delivery of ecosystem services. This project relies on an integrated valuation including both a biophysical and a social valuation. Focusing on the same fields as the above project, this one attempts to develop an innovative method to assess ecosystem services in agricultural fields by means of unmanned aerial vehicles (drones). [less ▲]

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See detailEcosystem services of mixed species forest stands and monocultures: comparing practitioners' and scientists' perceptions with formal scientific knowledge
Carnol, Monique ULiege; Baeten, Lander; Branquart, Etienne et al

in Forestry (2014), 87(5), 639-653

Mixed species stands might contribute to important goals of sustainable forest management, such as higher biological diversity, more resistance and resilience to disturbances and higher carbon storage ... [more ▼]

Mixed species stands might contribute to important goals of sustainable forest management, such as higher biological diversity, more resistance and resilience to disturbances and higher carbon storage. Knowledge of stakeholders' perceptions of such ecosystem services in mixed species stands is required for effective policy development. We showed that practitioners' and scientists' perceptions of ecosystem services in mixed species stands in Belgium differed from formal scientific knowledge derived from a synthesis of published studies. The positive perception of supporting, regulating and cultural services in mixed species stands contrasted with less conclusive results from the literature, where positive, negative and neutral effects were reported. Many respondents also signified a lack of information about regulating services. Furthermore, provisioning services were perceived as equal in mixed species stands and monocultures, in contrast to higher productivity demonstrated in mixed species stands in the literature. The regional (Flanders and Wallonia) ecological and socio-economic context influenced both the perception of ecosystem services and of the importance of management objectives. Our results highlighted the need to address the lack of scientific data, to adapt communication to the ecological and socio-economic context, as well as to improve information flow on regulating services and productivity. [less ▲]

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See detailEcosystem services provided by a large endangered primate in a forest-savanna mosaic landscape
Trolliet, Franck ULiege; Serckx, Adeline ULiege; Forget, Pierre-Michel et al

in Biological Conservation (2016)

Forested landscapes are increasingly affected by human activities, but little is known about the role of large endangered frugivores as seed dispersers in such ecosystems. We investigated the role played ... [more ▼]

Forested landscapes are increasingly affected by human activities, but little is known about the role of large endangered frugivores as seed dispersers in such ecosystems. We investigated the role played by the bonobo (Pan paniscus) in a human-altered forest-savannamosaic in Democratic Republic of the Congo. The studied groups are part of a community-based conservation programme but live at the interface with human activities. We identified dispersed species via faecal analysis, classified them into a regeneration guild and a seed size category, determined the effect of gut transit on seed germination, and the habitat use of bonobos. Bonobos dispersed intact seeds of 77 species, 80.8% of which were large-seeded (≥10mmlong), ofwhich fewcan be dispersed by sympatric frugivores. They dispersed a majority (49%) of shade-bearers that thrive in forest understory with limited amount of light, all of whichwere large-seeded. Transit had an overall positive effect on seed germination. Bonobos used various habitat types, showing preferences for understorywith intermediate light availability and dominated by woody or herbaceous vegetation. This dispersal pattern probably enhances recruitment of shadebearers, and we thus hypothesized that those species benefited from directed dispersal by bonobos. This threatened frugivore provides unique dispersal services and likely plays a paramount functional role in the regeneration of late successional forests in this mosaic landscape. Management plans should pay particular attention to the role of large and rare frugivores in human-dominated regions as their disappearance could disrupt forest succession to a climax state. [less ▲]

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See detailEcosystem Services: an opportunity for agroecology ?
Dufrêne, Marc ULiege; Dendoncker, Nicolas

Conference (2013)

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See detailAn ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements
Wohlfahrt, G.; Amelynck, C.; Ammann, C. et al

in Atmospheric Chemistry and Physics (2015), (15), 7413-7427

Methanol is the second most abundant volatile organic compound in the troposphere and plays a significant role in atmospheric chemistry. While there is consensus about the dominant role of living plants ... [more ▼]

Methanol is the second most abundant volatile organic compound in the troposphere and plays a significant role in atmospheric chemistry. While there is consensus about the dominant role of living plants as the major source and the reaction with OH as the major sink of methanol, global methanol budgets diverge considerably in terms of source/sink estimates, reflecting uncertainties in the approaches used to model and the empirical data used to separately constrain these terms. Here we compiled micrometeorological methanol flux data from eight different study sites and reviewed the corresponding literature in order to provide a first cross-site synthesis of the terrestrial ecosystem-scale methanol exchange and present an independent data-driven view of the land–atmosphere methanol exchange. Our study shows that the controls of plant growth on production, and thus the methanol emission magnitude, as well as stomatal conductance on the hourly methanol emission variability, established at the leaf level, hold across sites at the ecosystem level. Unequivocal evidence for bi-directional methanol exchange at the ecosystem scale is presented. Deposition, which at some sites even exceeds methanol emissions, represents an emerging feature of ecosystem-scale measurements and is likely related to environmental factors favouring the formation of surface wetness. Methanol may adsorb to or dissolve in this surface water and eventually be chemically or biologically removed from it. Management activities in agriculture and forestry are shown to increase local methanol emission by orders of magnitude; however, they are neglected at present in global budgets. While contemporary net land methanol budgets are overall consistent with the grand mean of the micrometeorological methanol flux measurements, we caution that the present approach of simulating methanol emission and deposition separately is prone to opposing systematic errors and does not allow for full advantage to be taken of the rich information content of micrometeorological flux measurements. [less ▲]

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See detailL'écosystème d'innovation universitaire de Aalto : une contribution au repérage des acteurs impliqués lors de la phase d'émergence
Froehlicher, Thomas ULiege; Barès, Franck

in Management International = International Management = Gestión Internacional (2014), 18(1), 153-165

The aim of this article is to better under- stand how the innovation ecosystem of Aalto University, in Helsinki, Finland, was structured in the early 2000s. Relying on an analysis of secondary data as ... [more ▼]

The aim of this article is to better under- stand how the innovation ecosystem of Aalto University, in Helsinki, Finland, was structured in the early 2000s. Relying on an analysis of secondary data as well as on the principles of a structural analy- sis of the network, we located the actors and their connections over the emergence period of this ecosystem. The results show the coexistence of two spaces organized as socio-cognitive networks able to interact and reinforce each other. A territorialized space, focused on an innovation dynamic built on the convergence strategy of the three university rectors involved at Aalto; and a deterritorialized space built by a community of actors focused on the affir- mation of proposals and ideas to imple- ment new innovation governance practices. [less ▲]

Detailed reference viewed: 49 (3 ULiège)
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See detailEcosystème de la vicimisation : le cas particulier du milieu scolaire
Born, Michel ULiege; Gavray, Claire ULiege

in Born, Michel; Kéfer, F.; Lemaître, A. (Eds.) Une criminologie de la tradition à l'innovation (2006)

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See detailL'écosystème planctonique de la baie de Calvi (Corse): caractéristiques biochimiques et physiologiques
Hecq, Jean-Henri ULiege; Goffart, Anne ULiege; Licot, Martine et al

in Bulletin de la Société Royale des Sciences de Liège (1988), 57

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

Conference given outside the academic context (2009)

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

Scientific conference (2013)

Detailed reference viewed: 46 (15 ULiège)
See detailLes écosystèmes microbiens redécouverts
Taminiau, Bernard ULiege; Delhalle, Laurent; Daube, Georges ULiege

Conference (2015, June)

La notion d'écosystème englobe la communauté d'organismes vivants, les facteurs abiotiques ainsi que le réseau d'interactions qui en découle. De par leur nombre et leur diversité, les micro-organismes ... [more ▼]

La notion d'écosystème englobe la communauté d'organismes vivants, les facteurs abiotiques ainsi que le réseau d'interactions qui en découle. De par leur nombre et leur diversité, les micro-organismes dominent la majorité des procédés biochimiques sur terre. L'écologie microbienne, née des travaux de Winogradsky et Hungate, se consacre à la compréhension de ces cycles métaboliques et ces mécanismes d’interaction. L’importance de cette compréhension est à la mesure des grands défis actuels comme la préservation des habitats naturels ou bien la réduction du réchauffement climatique. L’homme s’étant imposé comme un autre acteur d’influence majeur sur l’environnement, d'autres écosystèmes, plus proches de nos préoccupations comme l'agro-alimentaire, la microbiologie industrielle, le domaine de la santé ont pris de l'importance et sont autant de domaines d’application de la démarche écologique. L’ère de l’étude des communautés bactériennes sur une échelle plus large a débuté avec le développement de la biologie moléculaire dans les années 90. D’abord avec des méthodes comme le T-RFLP, le clonage et ensuite la DGGE, les chercheurs ont pu identifier des populations microbiennes sans passer par les milieux de culture. Depuis 2005 et la première application du pyroséquençage à la métagénétique, un coup d’accélérateur a été donné, aboutissant à un florilège de nouvelles technologies comme la métagénomique, la métaprotéomique ou la métabolomique permettant de caractériser les écosystèmes microbiens. Cette dynamique résulte notamment de la prise de conscience de l’importante du microbiote dans la vie de l’homme et de sa santé. Plusieurs exemples de ses nouvelles technologies « omiques » permettront d’illustrer leur apport dans la description et la compréhension des communautés microbiennes, ainsi que l’impact de l’écologie microbienne dans le management de ces écosystèmes par l’homme. L’exposé terminera sur les grandes questions d’actualité de cette science, telles l'intégration des données multiples dans les analyses, l'amélioration et standardisation des protocoles d'étude et la prise en compte de la théorie écologique dans la démarche de recherche. [less ▲]

Detailed reference viewed: 19 (2 ULiège)
See detailL’écotourisme
Vermeulen, Cédric ULiege; Portier, B.

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

Detailed reference viewed: 30 (6 ULiège)