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首页> 外文期刊>Ecological research >Relative influence of habitat heterogeneity, climate, human disturbance, and spatial structure on vertebrate species richness in Spain
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Relative influence of habitat heterogeneity, climate, human disturbance, and spatial structure on vertebrate species richness in Spain

机译：栖息地异质性，气候，人为干扰和空间结构对西班牙脊椎动物物种丰富度的相对影响

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摘要

Many factors affect the distribution of species richness. This study examines the relative influence of habitat heterogeneity, climate, human disturbance, and spatial structure on the species-richness distribution of terrestrial vertebrates (amphibians, reptiles, birds and mammals) in mainland Spain. The results indicate that spatial structure and environment exert similar influences on species richness. For all four taxa, species richness increases southward and northward, being lower in the center of the country, when controlled for other variables. This may be the result of a peninsular effect, as found in other studies, and reflect the importance of historical events on species richness in the Iberian Peninsula. Climate is more important than habitat heterogeneity in determining species richness. Temperature is positively correlated with amphibian, reptile, and bird species richness, while mammalian species richness is highest at intermediate temperatures. This effect is stronger in ectotherms than among endotherms, perhaps reflecting physiological differences. Precipitation positively correlates with bird and mammalian species richness, but has no effect on ectotherm species richness. Amphibian species richness increases with altitudinal range, and bird species richness with habitat diversity. Human population density is positively correlated with bird and mammalian species richness, but does not affect ectotherm species richness, while amphibian and bird species richness is highest at moderate levels of human land alteration (farmland). However, unexplained variance remains, and we discuss that the effects of environmental variables on species richness may vary geographically, causing different effects to be obscured on a national scale, diminishing the explanatory power of environmental variables.
机译：许多因素影响物种丰富度的分布。这项研究调查了西班牙大陆上栖息地异质性，气候，人为干扰和空间结构对陆地脊椎动物（两栖动物，爬行动物，鸟类和哺乳动物）物种丰富度分布的相对影响。结果表明，空间结构和环境对物种丰富度的影响相似。对于所有四个分类单元，受其他变量控制后，物种丰富度向南和向北增加，在该国中部较低。其他研究发现，这可能是半岛效应的结果，反映了历史事件对伊比利亚半岛物种丰富度的重要性。在确定物种丰富度方面，气候比生境异质性更为重要。温度与两栖动物，爬行动物和鸟类物种丰富度呈正相关，而哺乳动物物种丰富度在中间温度下最高。这种效应在外热中比在吸热中更强，这可能反映出生理上的差异。降水与鸟类和哺乳动物物种的丰富度呈正相关，但对外热物种的丰富度没有影响。两栖动物物种丰富度随海拔高度范围的增加而增加，鸟类物种丰富度随生境多样性的增加而增加。人口密度与鸟类和哺乳动物物种的丰富度呈正相关，但并不影响外热物种的丰富度，而两栖动物和鸟类的物种丰富度在中等程度的人类土地改变（农田）下最高。但是，仍然存在无法解释的方差，我们讨论了环境变量对物种丰富度的影响可能会在地理上发生变化，从而在全国范围内掩盖了不同的影响，从而削弱了环境变量的解释力。

著录项

  • 来源
    《Ecological research》 |2009年第2期|335-344|共10页
  • 作者

    Gregorio Moreno-Rueda; Manuel Pizarro;

  • 作者单位

    Konrad Lorenz Institut fuer Vergleichende Verhaltensforschung, OEsterreischische Academie der Wissenschaften, Savoyenstrasse la, 1160 Wien, Austria Departamento de Biologia Animal, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain;

    Departamento de Biologia Animal, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    amphibians; biodiversity birds; distribution; mammals; reptiles;

    机译：两栖动物生物多样性鸟类;分配;哺乳动物爬虫类;

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