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The impact of vehicular traffic on two frog populations of differing vagility, Rana pipiens and Rana clamitans .

机译:车辆交通对两个具有不同易变性的青蛙种群(皮蛙和蛙蛙)的影响。

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摘要

Vehicular traffic can be a major source of dispersal related mortality for some species. Highly vagile organisms should be at a disadvantage in landscapes with roads because they are more likely to encounter roads and incur traffic mortality. Population abundance of two sympatric anuran species of differing vagility, Rana pipiens (vagile) and Rana clamitans (less vagile) was assessed at 30 breeding ponds. Traffic density, an index of the amount of potential traffic mortality, was measured in concentric circles radiating from the pond, out to 5 km. Multiple linear regressions relating population abundance to traffic density, pond and landscape variables concluded that Rana pipiens populations were negatively affected by traffic within a radius of 1.5 km, while Rana clamitans populations were not correlated with traffic density. These results imply that vagile species are vulnerable to traffic mortality which can cause population decline.
机译:车辆运输可能是某些物种与传播有关的死亡率的主要来源。高度易变的生物在有道路的景观中应处于不利地位,因为它们更可能遇到道路并导致交通死亡。在30个繁殖池中评估了两种易变的同养无核物种的种群丰度,即皮纳蛙(Rana pipiens)(易变种)和拉纳克拉米坦(Cana mitmitan)(变小了)。在从池塘辐射到5公里的同心圆中测量了交通密度,这是潜在交通死亡率的一个指标。将种群丰度与交通密度,池塘和景观变量相关的多元线性回归得出结论,在1.5 km半径内,林蛙种群受到交通的负面影响,而林蛙种群与交通密度无关。这些结果表明,易变种易受交通死亡率的影响,这可能导致人口下降。

著录项

  • 作者

    Carr, Laurie W.;

  • 作者单位

    Carleton University (Canada).;

  • 授予单位 Carleton University (Canada).;
  • 学科 Ecology.;Forestry.;Environmental science.;Environmental engineering.
  • 学位 M.Sc.
  • 年度 1999
  • 页码 52 p.
  • 总页数 52
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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