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首页> 外文期刊>Indian Journal of Forestry >Biological spectrum of the flora of sand bars (chapories) of Brahmaputra River
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Biological spectrum of the flora of sand bars (chapories) of Brahmaputra River

机译:雅鲁藏布江沙洲(沙地)植物区系的生物谱

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摘要

Life forms of the vegetation and biological spectrum of the flora of sand bars (islands) of Brahmaputra River have been determined. Results show that the percentage of therophytes and cryptophytes in the newly developed sand bars is nearly three times higher than those of the same life forms in the normal biological spectrum of Raunkiaer (1934). Gradual sedimentation with annual recurrence of flood may be attributed for higher percentage value of therophytes. There is a general progression of plantspecies resulting from modification of the micro-environment by developing forest vegetation and changes in the soil characteristics with time, which resulted invasion of more phanerophytic plant species in the mature sand bars.
机译:确定了布拉马普特拉河的植被的生命形式和沙洲(岛屿)的植物区系的生物谱。结果表明,在新开发的沙洲中,生植物和隐生植物的百分比比Raunkiaer(1934)正常生物谱中的相同生命形式的植物高近三倍。每年不断发生洪水而逐渐沉积,可能是由于附生植物的百分比值较高。通过发展森林植被来微环境的改变以及土壤特性随时间的变化,导致植物物种的总体发展,这导致了更多沙生植物物种入侵成熟的沙洲。

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