Maintenance of biodiversity is an integral part of sustainable forest management. Epiphytic bryophytes are an important element of biodiversity. Thus, this work aims to study the role of different physical and biochemical factors in affecting the growth and proliferation of epiphytic liverworts. Fifty trees in three different plots, distributed in Senchal wildlife sanctuary, Darjeeling, were surveyed. Factors such as light intensity, moisture, and diameter at breast height (DBH) of the tree were studied to evaluate their possible role in affecting epiphytic liverworts. The effect of bark biochemical characteristics on the abundance of epiphytic liverworts was also studied by undertaking a quantitative test of pH, phenol, flavonoid, ortho-dihydric phenol, terpene, total sugar, and tannin. Multiple regression analysis and principal component analysis (PCA) were carried out to test the effects of these parameters. Light intensity, moisture, and DBH highly influenced the abundance of liverworts. Old trees had higher epiphytic liverwort cover than younger ones. Bark biochemical properties like pH, phenol, flavonoid, ortho-dihydric phenol, tannin and sugar did not have a significant effect on the epiphytic liverwort cover, while the terpenoid content of the bark reduced liverworts cover. To sustain the occurrence of epiphytic liverworts in ecosystems, forest management should ensure the presence of old trees. Light intensity and moisture had a large effect on the distribution and abundance of liverworts, so it is important to maintain tree cover, shrub layer, and tree density.

中文翻译：

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在喜马拉雅山东部大吉岭的Senchal野生动物保护区发现的柳杉皮树皮附生地榆的丰度与不同的物理和生化特性有关

维持生物多样性是可持续森林管理的组成部分。附生苔藓植物是生物多样性的重要组成部分。因此，这项工作旨在研究不同的物理和生化因素在影响附生地艾的生长和增殖中的作用。调查了分布在大吉岭Senchal野生动物保护区的三个不同地块的50棵树。研究了诸如树木的光强度，湿度和胸高直径（DBH）之类的因素，以评估其在影响附生艾蒿中的可能作用。还通过对pH，苯酚，类黄酮，邻二羟基苯酚，萜烯，总糖和单宁酸进行定量测试，研究了树皮生化特性对附生地艾的丰度的影响。进行了多元回归分析和主成分分析（PCA），以测试这些参数的效果。光照强度，湿度和DBH极大地影响了艾蒿的含量。老树的附生艾蒿盖度高于年轻树。树皮的生化特性，例如pH，苯酚，类黄酮，邻二羟基苯酚，单宁和糖对附生地艾草盖层没有显着影响，而树皮中的萜类化合物含量降低了地艾草盖层。为了维持生态系统中附生艾蒿的发生，森林管理应确保存在老树。光照强度和水分对艾蒿的分布和丰度影响很大，因此保持树木的覆盖，灌木层和树木的密度非常重要。