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首页> 外文期刊>Ecotropica >TREE DIVERSITY AND FOREST STAND STRUCTURE ALONG DISTURBANCE GRADIENTS IN INDIAN TROPICAL DRY EVERGREEN FOREST
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TREE DIVERSITY AND FOREST STAND STRUCTURE ALONG DISTURBANCE GRADIENTS IN INDIAN TROPICAL DRY EVERGREEN FOREST

机译：印度热带干性常绿林的扰动梯度上的树木多样性和林分结构

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摘要

We investigated tree diversity and forest stand structure in understudied Indian tropical dry evergreen forest experiencing different degrees of human disturbance. We hypothesized that tree species richness and forest stand structure differ with differing levels of human disturbance. All trees > 10 cm girth at breast height were assigned to four forest disturbance categories: relatively undisturbed (RD), moderately disturbed (MD), much disturbed (MU), and heavily disturbed (HD). A total of 5167 treesrepresenting 106 species in 86 genera and 36 families were enumerated. Analysis of variance showed no significant difference between tree diversity across the disturbance categories (P>0.05). With increasing forest disturbance, tree species richness, abundance, and basal area scores decreased. The highest tree species richness was recorded in RD sites and the lowest in HD sites. A Bray-Curtis cluster analysis produced three groups, in which MU sites formed a distinct group. Zoochorous dispersal was prevalent in terms of species richness and abundance as well. The low species richness and tree abundance in the disturbed sites indicate the degraded status of these forests, showing the urgent need for ecological restoration of the heavily disturbed sitesand conservation of MD and MU sites. The predominantly zoochorous mode of propagation also indicates the trees dependence on the local fauna, underlining the need for a holistic approach in biodiversity conservation of tropical dry evergreen forests.
机译：我们调查了印度热带干燥常绿森林中经历不同程度的人为干扰的树木多样性和林分结构。我们假设树种的丰富度和林分结构因人为干扰水平的不同而不同。胸围长大于10厘米的所有树木均被分为四个森林干扰类别：相对不受干扰（RD），中度干扰（MD），重度干扰（MU）和重度干扰（HD）。总共列举了5167棵树，代表86个属和36个科的106种。方差分析显示，不同干扰类别之间的树多样性之间无显着差异（P> 0.05）。随着森林干扰的增加，树木物种的丰富度，丰度和基础面积分数降低。在RD站点记录的树种丰富度最高，而在HD站点记录的树种丰富度最低。 Bray-Curtis聚类分析产生了三个组，其中MU站点形成了一个不同的组。就物种丰富度和丰度而言，人畜共患的传播也很普遍。受到干扰的地区物种丰富度低，树木丰富，表明这些森林的退化状况，表明迫切需要对受严重干扰的地区进行生态恢复以及保护MD和MU地区。主要为人畜共患的繁殖方式还表明树木对当地动物的依赖性，这强调了在热带干燥常绿森林生物多样性保护中需要采取整体方法。

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