TAILIEUCHUNG - Báo cáo lâm nghiệp: " Effects of tree species on understory vegetation and environmental conditions in temperate forests."

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Effects of tree species on understory vegetation and environmental conditions in temperate forests. | Ann. For. Sci. 60 2003 823-831 INRA EDP Sciences 2004 DOI forest 2003077 823 Original article Effects of tree species on understory vegetation and environmental conditions in temperate forests Laurent AuGUSTOa Jean-Luc DuPOUEYb Jacques RANGERb a INRA UMR-TCEM 71 av. Edouard Bourlaux 33883 Villenave d Ornon France b INRA 54280 Champenoux France Received 25 November 2002 accepted 05 December 2002 Abstract - The objective of this study was to compare the impact of six tree species on vegetation and soil. Eighty stands growing side by side and of different dominant species were selected in 26 locations. Within each location the stands had the same soil condition landscape position and previous land-use history. Ground vegetation and soil were sampled in each stand. The tree species were Norway spruce Picea abies Karsten. Scots pine Pinus sylvestris L. Douglas-fir Pseudotsuga menziesii Mirb. Franco silver fir Abies alba Miller European beech Fagus sylvatica L. and oaks Quercus robur L. Quercus petraea Matt. Liebl. . The geographic and geological characteristics of sites influenced the vegetation and the soil chemistry more than the tree species did. Forest management influenced the ground flora more than the tree species did. Number of species and equitability differed little with tree species. The ground flora under Norway spruce included more mosses than under the other trees species except silver fir. The ground flora under Norway spruce was more typical of oligotrophic and acidic conditions than the flora under European beech. Soils under coniferous species especially Norway spruce were more acidic and had higher concentrations of aluminium than soils under hardwoods. The effect of tree species on soils was greatest in the topsoil 0-10 cm . acidification biodiversity understory plantation tree species Résumé - Effet des essences sur la flore et la composition du sol en forêt tempérée. L objectif de cette étude était de comparer l effet sur la végétation et .

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