Biological spectrum of Bahadurpur forest, Nadia-Murshidabad Division Nadia, West Bengal.

摘要

The biological spectrum of Bahadurpur forest, a tropical deciduous forest of Nadia-Murshidabad Forest Division (West Bengal, India), reveals that out of a total of 158 species of vascular plants (154 species of angiosperms and 4 species of pteridophytes), phanerophytes occupy 57.59, chamaephytes 6.33, hemicryptophytes 8.23, cryptophytes 5.7 and therophytes 22.15. Thus phanerophytes top the list in respect of numerical strength and cryptophytes the bottom. The phytoclimate appears to be phanero-therophytic which indicates that the tropical community, although dominated by trees, tends to be xeric. Conservation of the site has contributed to the dominance of trees and shrubs. High scarcity of hemicryptophytes and somewhat lower value of cryptophytes indicate that the soil is under the stress of severe erosion and soil-niche is disturbed. High abundance of therophytes indicates dryness of the soil and xeric trend of the phytoclimate. This certainly will hamper the regeneration potential of the forest, regeneration niche of forest trees and shrubs and the soil habitat. So soil and water conservation through enhancement of hemicryptophytes and other soil-binding herbs and watershed management are deemed essential there.