Ecology, Environment and Conservation Paper

Vol.12, Issue 4, 2006; Page No.(589-598)

FLORISTIC COMPOSITION AND PLANT SPECIES DIVERSITY IN ALTITUDINAL CLASSES OF THE MANAGED FORESTS, ASALEM REGION, TALESH, NORTH OF IRAN

Hassan Poorbabaei and Tymour Roostami Shahraji

Abstract

In order to conduct this study, managed forests were divided into altitudinal classes regarding variation in plant species composition. In each altitudinal class, the tree, tree regeneration, shrub and herbaceous species were taken using selective sampling method in both northern and southern aspects. The results revealed that 116 plant species were found in the studied forests. The mean number of individuals and basal area of trees per plot and the mean number of shrubs and tree regeneration per subplot in southern were higher than northern aspect. Species diversity indices in tree, shrub and tree regeneration layers were higher in southern than northern aspect. In addition, diversity indices in herbaceous layer were higher in southern than northern aspect. The result of beta diversity showed that at all layers the southern were of higher values than the northern aspects.

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