L’importance des microorganismes dans les collections des musées d’histoire naturelle

Le 11 mai 2017, la Luxembourg Society for Microbiology (LSfM) a organisé sa première réunion nationale, intitulée « 1st Luxembourg Microbiology Day ». La microbiologie est un secteur en plein développement, au Luxembourg comme ailleurs. En atteste l’existence de nombreuses équipes de microbiologie dans les institutions de recherche luxembourgeoises dont le Musée national d’histoire naturelle. Rappelons.. Lire la suite

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Climate change, plasticity and genetic variation in Anthyllis vulneraria

Abstract Climate is a key factor determining plant distribution. Predictions of rapid climate change have resulted in a renewed interest in the possible responses of plants to changes in climate, such as migration to other localities, phenotypic plasticity and local adaptation. The aim of this project is to study the possible impact of predicted climate.. Lire la suite

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Consequences of ploidy level on the reproductive isolation, ecological niche differentiation and plasticity of two subspecies of Saxifraga rosacea

Abstract Despite technological advances at the molecular level, it is still difficult to differentiate two subspecies of closely related taxa. It is often necessary to combine genetic techniques with ecological studies to distinguish each of them. The main purpose of the present project is to assess the importance of ecological niche differentiation that can be.. Lire la suite

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Plant-animal interactions and climate change

• Tous les projets de recherche en biologie des populations Abstract The biological diversity of montane regions may be threatened by predicted climate change. Low mountain species frequently cannot respond to climate change by migrating upward, but only by plasticity or genetic adaptation. Predicted climate change will not only result in changed environmental conditions, but.. Lire la suite

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Elucidating the mechanisms generating plant diversity in time and space

Example from the genus Saxifraga studied with phylogenetic and phylogeographic approaches. Abstract This research project focuses on the forces that shape patterns of molecular genetic variation in plants. These can be historical factors (e.g. climate fluctuations) or genomic modifications like polyploidization events or hybridization between different species. A multidisciplinary approach combining statistical phylogeography and species.. Lire la suite

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Biologie des populations de la plante menacée Scorzonera humilis

Biol-pop-Scorzonera

Scorzonera humilis est une plante pérenne, caractéristique des prairies et landes humides peu amendées. Autrefois l’espèce était assez répandue mais elle est devenue beaucoup plus rare durant les dernières décennies. Actuellement elle est menacée dans une grande partie de l’Europe.

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Effet de la fragmentation des habitats sur des espèces végétales du genre Saxifraga et du genre Lychnis

EtudeFragmentation

Nous étudions deux couples d’espèces végétales des genres Saxifraga et Lychnis, dont l’une habite les prairies mésophiles et l’autre les pentes rocheuses siliceuses, deux habitats protégés au niveau européen. Les pentes rocheuses sont fragmentées de par leur nature alors que les prairies mésophiles, jadis répandues, ont diminués à cause de l’intensification de l’agriculture.

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Population biology of endangered plant species in newly available habitats

Abstract Habitat fragmentation and habitat deterioration are considered to be the major reasons for the decline in the number of populations of many plant species, which are now often threatened with local extinction. Today, nutrient-poor calcareous grasslands are among the most threatened habitat types and often exist only as remnant islands in a matrix of.. Lire la suite

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Mountain areas and their importance for the conservation of plant diversity in Central European grasslands

grasslands

Many formerly common plant species of nutrient-poor grasslands have strongly declined in Europe in the last decades due to changes in land use practices and the use of mineral fertilizers, resulting in the destruction and fragmentation of these grasslands. In mountain areas the intensification of land use practices has only recently begun and many grasslands are still nutrient-poor and traditionally managed.

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The social structure of the Eurasian Badger (Meles meles) in relation to population Density: A non-invasive genetic analysis

Abstract Accurate information about population levels of badgers is important in monitoring the impact of human pressure on badger numbers and assessing the conservation status of the population. However, at present there is no reliable and cost-effective badger census technique. The project aims to develop a hair collection protocol for the estimation of badger social.. Lire la suite

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