TAILIEUCHUNG - Báo cáo lâm nghiệp: "Gaps promote plant diversity in beech forests (Luzulo-Fagetum), North Vosges, France"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Gaps promote plant diversity in beech forests (Luzulo-Fagetum), North Vosges, France" | Ann. For. Sci. 62 2005 429-440 INRA EDP Sciences 2005 DOI forest 2005039 429 Original article Gaps promote plant diversity in beech forests Luzulo-Fagetum North Vosges France Thomas DEGENa Freddy DEVILLEZa Anne-Laure jACQUEMARTb a Biodiversity Res. Centre Forestry Unit UCL - Place Croix du Sud 2 bte 9 1348 Louvain-la-Neuve Belgium b Biodiversity Res. Centre Ecology and Biogeography Unit UCL - Place Croix du Sud 4-5 1348 Louvain-la-Neuve Belgium Received 23 July 2004 accepted 30 March 2005 Abstract - Windstorms are major disturbance factors in temperate forests of Western Europe. With climatic changes those events are likely to become more frequent. The study of their impacts on plant communities is essential. Therefore our objective was to evaluate the differences of the plant community after the 1999 windstorm that blew down approximately 968 000 ha across France. This study took place in the North Vosges 36 800 ha destroyed . The differences in species diversity resource requirements and functional plant traits were analysed with floristic surveys between undisturbed forest 10 plots and gaps ranging from 250 m1 2 and ha 65 plots . The results showed a higher plant diversity in the gaps. This increase was mainly due to the presence of more light-requiring forest species and more species with high dispersal abilities anemochorous or long-term persistent seedbank species . On the contrary species with greater competitive abilities increased their cover and decreased the diversity. The other resource requirements were not modified in the gaps. This short-term study showed that functional traits and their interactions play a major role to determine the species composition in gaps especially compared to the species requirements for the resources except light. forest gaps vegetation changes species diversity functional traits Ellenberg indicator values Résumé - Les trouées favorisent la diversité végétale en hêtraie Luzulo-Fagetum dans les Vosges du Nord .

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