Can picnic influence floral diversity and vitality of trees in Bhawal National Park of Bangladesh?
Can picnic influence floral diversity and vitality of trees in Bhawal National Park of Bangladesh?作者机构：Institute of Silviculture Department of Forest and Soil Sciences University of Natural Resources and Applied Life Sciences Vienna A-1190 Austria
出 版 物：《Forestry Studies in China》 (中国林学（英文版）)
年 卷 期：2009年第11卷第3期
页 面：148-157页
主 题：species richness diversity index concentration of dominance regeneration intensity
摘 要：We examined the impact of picnic activities on forest diversity, structure, regeneration and vitality of tree species in the Bhawal National Park of Bangladesh. The study area was classified as a non-used, occasionally used and frequently used area on the basis of the intensity of the picnic activities. A total of 43 plant species were enumerated in the whole study area. The highest plant species richness （41 species） was observed in the non-used area whereas the lowest species richness （11 species） in the frequently used area. The diversity index decreased with the increase of picnic intensity whereas the concentration of dominance increased. Density of all plant groups except mature trees, and the basal area of the mature trees showed a declining trend from the non-used to frequently used area. The frequently used area exhibited very poor regeneration. Tree vitality decreased with the increase of picnic intensity. The relevance of our study as a basis for further research to determine the impact of tourism on biodiversity in Bangladesh is discussed.
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