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Effect of Habitat Complexity on Richness, Abundance and Distributional Pattern of Forest Birds

机译：生境复杂度对森林鸟类丰富度，丰度和分布格局的影响

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摘要

Structurally complex forests provide more diverse conditions in comparison to homogenous forests because of greater variety of microhabitats and trees. This study assesses the association of bird species richness, abundance, and distributional pattern with habitat complexity (HC) in Kheyrud Forest in the north of Iran. Birds were surveyed during spring 2009 by 100 point counts. In each point count six habitat features related to the index of HC were computed and scored from 0 to 3. Then the scores were summed and divided into two groups of low and high complexity, HC < 6 and HC > 6, respectively. To compare bird richness and abundance in different HCs, a two sample r-test was used. Presence and absence of bird species at each plot as a dependent variable were compared with the vegetation characteristics as an independent variable by means of the Canonical Correspondence Analysis. The results revealed bird species richness and abundance were significantly higher in more complex habitats. Bird species can be divided into two groups, the first group including species which associated with late successional stages and the second group, species belonging to early successional stages. Numbers of birds belonging to the first group declined in less complex forests, whereas the numbers of birds belonging to the second group increased. At the stand scale, our results reveal that bird abundance and richness are strongly associated with the complexity of vegetation structure in the study area.
机译：与同质森林相比，结构复杂的森林提供了更多不同的条件，原因是微型生境和树木种类繁多。这项研究评估了伊朗北部Kheyrud森林中鸟类物种的丰富度，丰度和分布模式与栖息地复杂性（HC）的关系。在2009年春季，对鸟类进行了100点计数调查。在每个点计数中，计算了与HC指数相关的六个栖息地特征并对其评分（从0到3）。然后将这些分数相加并分为低复杂度和高复杂度两组，分别为HC <6和HC> 6。为了比较不同HC中鸟类的丰富度和丰度，使用了两个样本的r检验。通过典范对应分析，将每个样地上鸟类的有无作为因变量与植被特征作为自变量进行比较。结果表明，在更复杂的栖息地中，鸟类物种的丰富度和丰度明显更高。鸟类种类可分为两类，第一类包括与演替后期有关的物种，第二类包括属于演替早期的物种。在不太复杂的森林中，属于第一类的鸟类数量减少了，而属于第二类的鸟类数量增加了。在林分尺度上，我们的研究结果表明，鸟类丰富度和丰富度与研究区域植被结构的复杂性密切相关。

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  • 来源
    《Environmental Management》 |2012年第2期|p.296-303|共8页
  • 作者

    Maryam Ghadiri Khanaposhtani; Mohammad Kaboli; Mahmoud Karami; Vahid Etemad;

  • 作者单位

    Department of Environmental Sciences, Faculty of Natural Resources, University of Tehran, Daneshkadeh Street, PO Box 41111, Karaj, Iran;

    Department of Environmental Sciences, Faculty of Natural Resources, University of Tehran, Daneshkadeh Street, PO Box 41111, Karaj, Iran;

    Department of Environmental Sciences, Faculty of Natural Resources, University of Tehran, Daneshkadeh Street, PO Box 41111, Karaj, Iran;

    Department of Environmental Sciences, Faculty of Natural Resources, University of Tehran, Daneshkadeh Street, PO Box 41111, Karaj, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    forest; avian community; habitatcomplexity; richness; abundance; distributional pattern;

    机译：森林;鸟类群落;生境复杂性丰富;丰富;分布模式;

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