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See detailEcological fitness of Bacillus subtilis BGS3 regarding production of the surfactin lipopeptide in the rhizosphere
Nihorimbere, Venant ULiege; Fickers, Patrick ULiege; Thonart, Philippe ULiege et al

in Environmental Microbiology Reports (2009), 1(2), 124-130

Cyclic lipopeptides and particularly surfactins produced by Bacillus species retain antibacterial, antiviral, biofilm-forming and plant resistance-inducing activities. In most cases, their role in ... [more ▼]

Cyclic lipopeptides and particularly surfactins produced by Bacillus species retain antibacterial, antiviral, biofilm-forming and plant resistance-inducing activities. In most cases, their role in biological control of plant diseases was evoked on the basis of in vitro assays or by using non-producing/ overproducing mutants but there is a need for more direct evidence of an efficient lipopeptide biosynthesis in the rhizosphere. In this work, we coupled LC-MS quantification of the lipopeptides secreted by cells colonizing tomato plants with the use of psrfA– lacZ reporter system integrated within the BGS3 chromosome to study the expression of the surfactin operon in planta. Results showed that a higher level of psrfA induction was observed upon the establishment of a stable BGS3 population on roots and surfactins extracted from the rhizosphere were produced in biologically significant quantities. Our results also demonstrate that BGS3 efficiently utilizes the main substrates from plant exudates to produce surfactins. This synthesis is also efficient in cells forming colonies and the production may be favoured in bacteria developing slowly in the rhizosphere. This provides a first understanding of how environmental factors may influence lipopeptide production by beneficial Bacillus strains. [less ▲]

Detailed reference viewed: 108 (24 ULiège)
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See detailEcological functionality in agriculture
Pécheur, Emilie ULiege

Poster (2014, December 17)

Detailed reference viewed: 21 (0 ULiège)
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See detailEcological impact of habitat loss on African landscapes and diversity
Vranken, Isabelle ULiege; Djibu Kabulu, J P; Munyemba Kankumbi, F et al

in Daniels, J A (Ed.) Advances in environmental research, volume 14 (2011)

Detailed reference viewed: 105 (31 ULiège)
See detailEcological impact of the opportunist northern pigtailed macaques (Macaca leonina) in degraded environments: Ranging pattern, seed dispersal and predatory behavior in Central Thailand
Gazagne, Eva ULiege

Conference (2015, December 01)

Deforestation and fragmentation have become the most important threats for biodiversity due to both plant and animal dispersal movement limitation impacting seed dispersal and prey-predator interactions ... [more ▼]

Deforestation and fragmentation have become the most important threats for biodiversity due to both plant and animal dispersal movement limitation impacting seed dispersal and prey-predator interactions. Through the study of the adaptive and opportunistic northern pigtailed macaque (Macaca leonina), this PhD aims to assess how fragmentation affects the macaques’ habitat use, seed dispersal and predatory behavior in a highly fragmented and degraded environment (Sakaerat Biosphere Reserve, Central Thailand). Investigating the ranging pattern and feeding behavior of this macaque, acknowledged as an effective seed disperser, in a disturbed environment, will provide a concrete example of potential forest regeneration by a natural agent. Moreover, as this is a very efficient passerine nest predator, the study of its ranging behavior will allow assessing the extent of a generalist predator efficiency in a fragmented environment. [less ▲]

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See detailEcological impacts of an invasive species in Wallonie, the raccoon Procyon lotor
Campos-Martinez, Irène; Gautherot, J.; Lambinet, Clotilde ULiege et al

Poster (2013, August)

Detailed reference viewed: 46 (12 ULiège)
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See detailEcological Impacts of Invasive Plant Species
Vanderhoeven, Sonia ULiege

Conference (2007)

Detailed reference viewed: 11 (0 ULiège)
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See detailEcological intensification of fish production : Fertilization strategies in Africa fish farms
Mafwila Kinkela, Patrick ULiege; Kambashi Mutiaka, Bienvenu ULiege; Rollin, Xavier et al

Poster (2017, February)

Ponds fertilization has been found as strategies of intensification fish production for farm in Africa were commercial feeds are not available and ingredients for formulate completed feed are cost ... [more ▼]

Ponds fertilization has been found as strategies of intensification fish production for farm in Africa were commercial feeds are not available and ingredients for formulate completed feed are cost. However, farmers are not safe to any danger because the efficiency of these strategies is not always known owing to the associated risk of eutrophication. An experience was making to assess how various fertilization practices would impact fish growth and physicochemical parameters of water in the pond. [less ▲]

Detailed reference viewed: 39 (2 ULiège)
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See detailEcological modeling and paedomorphosis: a study case in Montenegrin newts
Denoël, Mathieu ULiege; Ficetola, Gentile; Cirovic, Rusa et al

Poster (2009)

Detailed reference viewed: 24 (2 ULiège)
See detailEcological modeling of the upper layers of Lake Kivu: a progress report
Leblanc, Christophe; Darchambeau, François ULiege; Descy, Jean-Pierre et al

Conference (2009, January 19)

Detailed reference viewed: 7 (1 ULiège)
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See detailEcological network and local authorities - sociological instrument
Mougenot, Catherine ULiege; Roussel, Laurence

in Nature and environment (2002), (126), 37

Ever closer links have been forged between caring for nature on the one hand and human activities on the other. In recent years there has been a shift from an interest in reserve-based nature, which ... [more ▼]

Ever closer links have been forged between caring for nature on the one hand and human activities on the other. In recent years there has been a shift from an interest in reserve-based nature, which excluded man and human activities, to an increasingly powerful nature-culture relationship. Nature protection became nature conservation and then nature development with the integration of socio-economic and cultural aspects. Within the framework of the setting-up of the pan-european ecological network, these sociological aspects have a great importance for establishing an ecological network where the scientific aspects of biodiversity protection must co-exist with nature management and development. [less ▲]

Detailed reference viewed: 38 (7 ULiège)
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See detailEcological or recalled assessments in chronic musculoskeletal pain? A comparative study of prospective and recalled pain assessments in low back pain and lower limb painful osteoarthritis.
Perrot, Serge; Marty, Marc; Legout, Valerie et al

in Pain Medicine : The Official Journal of the American Academy of Pain Medicine (2011), 12(3), 427-36

OBJECTIVES: The objective of this study was to compare ecological and recalled pain intensity assessments over 29 days in hip and knee osteoarthritis (O) and chronic low back pain (L). PATIENTS AND ... [more ▼]

OBJECTIVES: The objective of this study was to compare ecological and recalled pain intensity assessments over 29 days in hip and knee osteoarthritis (O) and chronic low back pain (L). PATIENTS AND METHODS: Rheumatologists were asked to enroll patients with O and L, with pain intensity above 40 mm, in a prospective study for 29 days. Pain intensity was assessed with physicians on Days 1 and 29, and ecologically, over the intervening 28-day period, by random phone calls. RESULTS: We carried out correlation analyses for 353 (159 O, 194 L) patients: Overall recalled daily pain was strongly correlated with calculated 3-day mean pain assessments (r=0.96 [O]; 0.93 [L]) and evening pain (r=0.96 [O], 0.90 [L]). Correlations between ecological and recalled measures were stronger for recall over the last 7 days than for recall over the last 28 days in osteoarthritis patients (r=0.78, r=0.63), but were similar for both recall periods in low back pain patients (r=0.70, r=0.72). Correlations between assessments for the last 7 and 28 days were stronger for ecological (r=0.88 [O], 0.91 [L]) than for clinical (r=0.77 [O]; 0.86 [L]) assessments. After adjustment for current pain intensity, correlations remained significant for ecological assessments, but not for clinical assessments. Recalled pain assessments were more accurate when made after 24 hours (r=0.71 [O]; 0.70 [L]) than when made after 48 hours (r=0.63 [O]; 0.61 [L]). CONCLUSIONS: For both low back pain and osteoarthritis, overall daily pain recall is a reliable measurement correlated with daily ecological measurements, whereas a rapid decrease in recall occurs after 48 hours. The most reliable period for pain recall was 7 days, but the results obtained were influenced by current pain. [less ▲]

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See detailEcological requirements for black grouse. A case study in the belgian Hautes-Fagnes.
Keulen, Christine; Pieper, Y.; Doyen, A. et al

Conference (2003, September 08)

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See detailEcological requirements for black grouse. A case study in the belgian Hautes-Fagnes.
Keulen, C.; Pieper, Y.; Doyen, A. et al

in Silvia (2003), 39

Detailed reference viewed: 11 (4 ULiège)
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See detailEcological review of black-grass (Alopecurus myosuroides Huds.) propagation abilities in relationship with herbicide resistance
Maréchal, Pierre-Yves ULiege; Henriet, François; Vancutsem, Françoise ULiege et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(1),

Alopecurus myosuroides Huds. (vulpin des champs) a toujours été une préoccupation majeure pour les céréaliculteurs et le développement de la résistance aux herbicides n’améliore pas la situation. Cet ... [more ▼]

Alopecurus myosuroides Huds. (vulpin des champs) a toujours été une préoccupation majeure pour les céréaliculteurs et le développement de la résistance aux herbicides n’améliore pas la situation. Cet article de synthèse résume les différents critères impliqués dans les modèles de dispersion d’individus de vulpin des champs au sein d’un champ ou d’une population sensible. Pour ce faire, le cycle complet du vulpin est décrit de la semence à la semence. Depuis le développement végétatif précoce jusqu’à la chute de la graine, chaque étape est décrite en prenant en compte comment la résistance aux herbicides peut influencer ou exercer un impact différent par rapport à des plantes sensibles. [less ▲]

Detailed reference viewed: 92 (7 ULiège)