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Since the beginning of the 20th century, the concepts of ecotones, ecoclines and edge effects have been discussed from a theoretical point of view. However, there have been very few experimental tests of these ideas, which are sometimes radically different. This study presents data from field experimental researches and determines the status of transitions between cereal fields and grazed grasslands...
We performed a comparative analysis of two neighbouring chalk hillsides, constituted of mosaics of patches of different secondary successional ages but differing with respect to recent land use history (stable vs. variable). A survey on plant communities was performed with similar design for each site. Multivariate analyses were performed to study the relationships between vegetation and environmental...
Les capacités compétitives de végétaux ont été interprétées à partir de la mesure de leurs caractéristiques morphologiques en conditions de compétition interspécifique. Ces mesures ont été réalisées grâce à des cultures expérimentales en compétition interspécifique de quatorze plantes adventices avec une espèce domestiquée et cultivée à grande échelle : le blé d’hiver (Triticum aestivum var Darius)...
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