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首页> 外文期刊>Environmental Sustainability >Structure and composition of tree species in tropical moist deciduous forests of Eastern Ghats of Odisha,India,in response to human-induced disturbances
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Structure and composition of tree species in tropical moist deciduous forests of Eastern Ghats of Odisha,India,in response to human-induced disturbances

机译：结构和树种组成热带湿润落叶东高止山脉的森林Odisha、印度,由于人类活动导致的干扰

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摘要

The changes in plant species diversity and community structure in response to human induced disturbances were studied in 12 ha of tropical moist deciduous forest stands of Eastern Ghats of Odisha,India.The forest stands were classified as undisturbed(UD),moderately disturbed(MD)and highly disturbed(HD)categories based on the types and levels of human-induced disturbance.Twenty four transects,each measuring 0.5 ha(5 m × 1000 m)were laid for enumeration of trees with ≥ 30 cm GBH.In total,5451 trees under 101 species,78 genera and 37 families were found to occur in the study site.The density of trees and basal area decreased with the increase in the level of disturbance.While the stand density varied in the range of 185.50 in HD stands to 744 stems ha~(-1)in UD stands,basal area ranged between 12.54 in HD to 36.95 m~2 ha~(-1)in UD stands.The number of individuals and number of species per unit area showed a declining trend with increase in girth class.Maximum number of species and density was recorded for trees of low girth class(30-60 cm)in all three stands.Shannon,Simpson,Fisher‘s alpha and Margaleff‘s indices varied greatly across the three stands experiencing different levels of disturbance.Shannon‘s Index varied between 3.20 and 3.42 and Simpson Index ranged from 0.09 to 0.12.The range of variation in Evenness index,Fisher‘s alpha index and Margaleff‘s index were recorded between 0.75-0.79,14.45-16.10 and 29.65-34.83,respectively.The diversity of shrub,liana and herb species and regeneration potential of tree species were assessed from two 5 m × 5 m sub-plots located within each transect.Dominance of trees in undisturbed forests,shrubs and lianas in moderately disturbed and herbs in highly disturbed forests were observed.The data generated in the present investigation may prove useful for formulation of appropriate forest management strategies.
机译：植物物种多样性和变化群落结构以应对人类诱导在12公顷的热带扰动进行了研究潮湿的落叶林站的东高止山脉Odisha,印度。原状(UD),中度干扰(MD)和高干扰(HD)基于类型的分类和人为干扰水平。四个横断面,每个测量0.5公顷(5 m×1000m)为枚举树≥30厘米的命。属和37科被发现出现在学习网站。提高水平的下降干扰。185.50在HD 744茎哈哈~ (1)UD,底面积之间不等12.54在HD 36.95米~ 2公顷UD站~(1)。每件数量的个体和物种的数量与增加单位面积呈下降趋势在周长类。记录密度低腰身的树木类(30 - 60厘米)在所有三个站。Margaleff指数有很大的不同三个站出现不同程度的干扰。和3.42和辛普森指数从0.09不等0.12.指数,费雪的α指数和Margaleff指数记录在0.75 - -0.79之间,-16.10和14.45吗分别为29.65 - -34.83。灌木、藤本植物和草本物种和再生从两个树种的潜力进行评估位于5 m×5 m插曲样。森林,灌木和藤本植物在中度干扰和香草在高度被破坏的森林观察到。对于制定调查可能有用适当的森林管理策略。

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