On the hospitality of Western Ghats habitats for bird communities
On the hospitality of Western Ghats habitats for bird communities
复制标题
西高止山脉栖息地对鸟类群落的热情好客
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
M. Gadgil
中科院分区：
文献类型：
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作者：
P. Pramod;N. Joshi;U. Ghate;M. Gadgil
物种组合的特征是根据个体数量或多样性的各种措施，如物种丰富度或均匀度。我们可以根据其组成物种的分布范围和组合的凝聚力来描述这些组合的集合。在本文中，我们分别定义了这些属性的度量，称为普遍性和好客性。在印度半岛西高止山脉的21个地点，利用100米× 500米至600米的1小时样带对132个鸟类种群进行了普查，研究了这两个参数的分布，以及更常用的多样性测量方法。我们发现，虽然表征单个样块的生物参数彼此之间呈正相关，但普遍性和好客性的各种措施形成了彼此正相关的独特参数组，而纬度和降雨量等物理参数形成了第三个独立的正相关参数组。因此，好客和无处不在被证明是独立的参数，提供了生物学上有用的见解。例如，山地常绿森林和单一栽培人工林都有物种贫乏的群落。然而，山地常绿森林是有限地理分布的紧密组合，而单一栽培森林则包括来自许多不同生境类型的广泛存在的物种。
Species assemblages have been characterized in terms of numbers of individuals or various measures of diversity such as species richness or evenness. We may characterize sets of such assemblages in terms of how widespread their constituent species are and how cohesive the assemblages are. In this paper we define measures of these properties termed ubiquity and hospitality respectively. We explore the distribution of these two parameters, as well as the more commonly used measures of diversity for a set of 132 bird assemblages censused with the help of one hour long transects of 100 m × 500 m to 600 m in 21 localities covering 9 major types of habitats from across the entire length of the hill chain of Western Ghats in peninsular India. We find that while biological parameters characterizing individual transects are positively correlated amongst each other, various measures of ubiquity and hospitality form a distinct group of parameters positively correlated with each other, and physical parameters such as latitude and rainfall form a third independent group of positively correlated parameters. Hospitality and ubiquity thus turn out to be independent parameters providing biologically useful insights. For instance, montane evergreen forests and monoculture plantations both harbour species poor communities. However those of montane evergreen forests are cohesive assemblages of restricted geographical distributions, while those of monoculture comprise species of widespread occurrence drawn from many different habitat types.