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Habitat Selection and Risk of Predation: Re-colonization by Lynx had Limited Impact on Habitat Selection by Roe Deer

机译:栖息地的选择和被捕食的风险:Lynx重新定居对Ro的栖息地选择影响有限

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摘要

Risk of predation is an evolutionary force that affects behaviors of virtually all animals. In this study, we examined how habitat selection by roe deer was affected by risk of predation by Eurasian lynx - the main predator of roe deer in Scandinavia. Specifically, we compared how habitat selection by roe deer varied (1) before and after lynx re-established in the study area and (2) in relation to habitat-specific risk of predation by lynx. All analyses were conducted at the spatial and temporal scales of home ranges and seasons. We did not find any evidence that roe deer avoided habitats in which the risk of predation by lynx was greatest and information-theoretic model selection showed that re-colonization by lynx had limited impact on habitat selection by roe deer despite lynx predation causing 65% of known mortalities after lynx re-colonized the area. Instead we found that habitat selection decreased when habitat availability increased for 2 of 5 habitat types (a pattern referred to as functional response in habitat selection). Limited impact of re-colonization by lynx on habitat selection by roe deer in this study differs from elk in North America altering both daily and seasonal patterns in habitat selection at the spatial scales of habitat patches and home ranges when wolves were reintroduced to Yellowstone National Park. Our study thus provides further evidence of the complexity by which animals respond to risk of predation and suggest that it may vary between ecosystems and predator-prey constellations.
机译:掠食的风险是一种进化力,会影响几乎所有动物的行为。在这项研究中,我们研究了Scan的栖息地选择如何受到欧亚天猫(斯堪的纳维亚半岛the的主要天敌)掠食的风险的影响。具体来说,我们比较了ro的栖息地选择如何变化(1)在研究区域重建天猫之前和之后以及(2)与天猫捕食特定栖息地的风险有关。所有分析都是在家庭范围和季节的时空尺度上进行的。我们没有发现任何证据表明ro避开了天猫被捕食风险最大的栖息地,信息理论模型的选择表明,尽管天猫被捕食导致causing的捕食,of的再定殖对ro的生境选择影响有限。天猫座重新定居后,已知的死亡人数。相反,我们发现,当5种生境类型中的2种生境可用性增加时,生境选择会减少(这种模式在生境选择中称为功能性响应)。在这项研究中,山猫重新定居对ro选择栖息地的影响与北美麋鹿不同,北美麋鹿将狼重新引入黄石国家公园时会改变栖息地斑块和栖息地的空间尺度上栖息地选择的每日和季节性模式。因此,我们的研究提供了动物应对捕食风险的复杂性的进一步证据,并表明在生态系统和捕食者-猎物星座之间动物可能会有所不同。

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