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首页> 外文期刊>Ecological research >Local coexistence and niche differences between the Lusitanian and Mediterranean pine voles (Microtus lusitanicus and M. duodecimcostatus)
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Local coexistence and niche differences between the Lusitanian and Mediterranean pine voles (Microtus lusitanicus and M. duodecimcostatus)

机译：Lusitanian和地中海松田鼠（Microtus lusitanicus和M. duodecimcostatus）之间的局部共存和生态位差异

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摘要

In the present study, we analyzed the coexis tence pattern of the Lusitanian pine vole (Microtus lusitanicus) and the Mediterranean pine vole (Microtus duodecimcostatus) in a potential area of sympatry in a Mediterranean landscape (Portugal). We also deter mined the relative contribution of local, landscape, and spatial factors explaining the differences in the distri bution patterns of the two species in the region. Using a kriging interpolation method, we obtained a map of sympatric and allopatric areas of species occurrence. The estimated sympatry area corresponded to a north west-southeast belt representing 11.3% of the study area. Habitat niche differences were assessed with binomial GLMs followed by a variance partitioning. At a local scale, higher altitude, higher cover of shrubs, lower clay content in the soil, and lower cover of tree canopy were the most important factors distinguishing M. lusitanicus presence sites from those with M. duo decimcostatus. At a larger scale, the presence of forest landscape units and the low abundance of "montado" units were the most influencing landscape factors in the identification of M. lusitanicus occurrence sites when compared to M. duodecimcostatus. Our results suggested that local coexistence of M. lusitanicus and M. duodec imcostatus in the field is a rare event. The differences in distribution patterns of the two pine vole species were mostly explained by fine-scale environmental factors and by shared spatial effects.
机译：在本研究中，我们分析了地中海景观（葡萄牙）中潜在的象征区域鲁西塔尼亚松田鼠（Microtus lusitanicus）和地中海松田鼠（Microtus duodecimcostatus）的共存模式。我们还确定了局部，景观和空间因素的相对贡献，解释了该区域两种物种分布模式的差异。使用克里金插值方法，我们获得了物种出现的同生和异源区域地图。估计的共生带面积对应于代表研究区域的11.3％的西北-东南-东南带。用二项式GLM评估生境生态位差异，然后进行方差划分。在地方尺度上，较高的海拔，较高的灌木覆盖，较低的土壤黏土含量和较低的树冠覆盖度是区分lusitanicus和decimcostatus的最重要因素。在更大范围内，与十二指肠杆菌相比，森林景观单元的存在和“ montado”单元的低丰度是鉴定lusitanicus发生地点的最大影响景观因子。我们的研究结果表明，该领域的lusitanicus和duodec imcostatus局部存在是罕见的。两种松田鼠物种分布模式的差异主要由精细的环境因素和共同的空间效应来解释。

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  • 来源
    《Ecological research》 |2010年第5期|p.1019-1031|共13页
  • 作者

    Sara M. Santos; rnMaria da Luz Mathias; rnAntonio P. Mira;

  • 作者单位

    Department of Animal Biology,Centre for Environmental and Marine Studies,Faculty of Sciences, University of Lisbon,Campo Grande, 1749-016 Lisbon, Portugal;

    rnDepartment of Animal Biology,Centre for Environmental and Marine Studies,Faculty of Sciences, University of Lisbon,Campo Grande, 1749-016 Lisbon, Portugal;

    rnConservation Biology Unit,Institute of Mediterranean Agricultural and Environmental Sciences, University of Evora,Polo da Mitra, 7002-554 Evora, Portugal;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    microtus lusitanicus; microtus duodecimcostatus; kriging; sympatry; niche differences;

    机译：田鼠田鼠克里格象征生态位差异;

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