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Dynamique et restauration d’une steppe méditerranéenne après changements d’usages Introduction Land-use changes have lead to major alterations of ecosystems all around the world in the recent decades (Vitousek et al., 1997; Rands et al., 2010). Due to progress in agronomy...
Décryptage des réseaux d’interactions plante-champignon pour une meilleure gestion des subéraies méditerranéenne Cork oak ecology Cork oak physiology and genetic Cork oak (Quercus suber L., Fagaceae) is a sclerophyllous tree occurring in the western Mediterranean Basin, selectively growing on acidic...
Télécharger le fichier original (Mémoire de fin d'études) Fish migration system Mekong fishes migrate longitudinally and laterally among critical habitats of the Mekong mainstream and its tributaries or between the floodplains and deeper areas of lakes or permanent water bodies....
Télécharger le fichier original (Mémoire de fin d'études) Willershausen (Pliocene, -3.2 to -2.6 Ma) The famous Lagerstätten Willershausen (3.2 – 2.6 Ma; MN 16/17; Hilgen, 1991; Mai, 1995) is an ancient clay mine, now inactive and classified as a natural...
Structures et variations des réseaux trophiques des poissons en zones côtières Origin of and variability in organic matter in the Canche estuary As estuaries are complex and changing ecosystems, it is challenging to distinguish the sources of organic matterat the...
CURRICULUM VITAE Award for best poster for a young researcher (younger than 35 years) in the category Atmospheric Aerosols on the Sixth Scientific Conference of the International Global Atmospheric Chemistry Project (IGAC), Bologna, Italy, September 13-17, 1999; this award was...
Interactions entre processus microbiens, cycle des nutriments et fonctionnement du couvert herbacé LE PROCESSUS DE NITRIFICATION La nitrification est classiquement définie comme le processus microbiologique par lequel l’ammonium (NH4 + ) est oxydé en nitrite (NO2 - ) puis en...
SEASONAL TRANSLOCATION OF FOLIAR NITROGEN WITHIN BEECH TREES Introduction From fifty years, drought periods and heat waves have increased in worldwide as a consequence of global climate change and this trend is expected to increase in the coming decades (Coumou...
ÉVOLUTION SPATIO-TEMPORELLE DE L’ACIDIFICATION DES SOLS FORESTIERS FRANÇAIS The acidity of many regions of the world has increased as a consequence of food and energy production to sustain a growing global population (Galloway, 1995). These factors have led to enhanced...
ÉVOLUTION SPATIO-TEMPORELLE DE LA DISPONIBILITÉ EN AZOTE DES SOLS FORESTIERS FRANÇAIS AU COURS DU 20ème SIÈCLE Humans activities have transformed the global nitrogen (N) cycle at a record pace (Galloway et al., 2008). Over the last half-century, anthropogenic emissions of...