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首页> 外文期刊>Polar biology >Daily patterns of activity of passerine birds in a Magellanic sub-Antarctic forest at Omora Park (55°S), Cape Horn Biosphere Reserve, Chile
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Daily patterns of activity of passerine birds in a Magellanic sub-Antarctic forest at Omora Park (55°S), Cape Horn Biosphere Reserve, Chile

机译：智利合恩角生物圈保护区奥莫拉公园（55°S）的麦哲伦南极亚热带森林中雀形目鸟类的日常活动模式

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摘要

Ecosystems in the sub-Antarctic region can be subjected to extreme weather conditions year-round. Little data exist that show any relationship between climatic variables and activity patterns of passerine birds, despite the fact that weather patterns can have a dramatic influence on the foraging strategies of these birds in different seasons. Passerine birds must balance the risk of starvation and the risk of predation in accordance with variation in environmental variables. The goal of this study was to determine the relationship of season, habitat type and weather patterns with the daily activity patterns of three diurnal passerine bird species from different trophic guilds. Unlike most low-latitude passerine species, the three passerine bird species in Omora Park on Navarino Island do not show strict adherence to a bimodal activity pattern; instead, these birds show a variety of activity patterns throughout the year that differ by trophic guild and habitat type. These modifications in activity patterns may be an adaptation to minimize the risk of predation and starvation in the face of temperature-dependent food availability.
机译：南极次区域的生态系统全年可能遭受极端天气条件的影响。尽管天气模式可能对这些鸟类在不同季节的觅食策略产生重大影响，但很少有数据显示出气候变量和雀形目鸟类活动模式之间有任何关系。雀形目鸟类必须根据环境变量的变化来平衡饥饿和被捕食的风险。这项研究的目的是确定季节，栖息地类型和天气模式与来自不同营养协会的三种昼夜雀形目鸟类日常活动模式之间的关系。与大多数低纬度的雀形目鸟类不同，纳瓦里诺岛奥莫拉公园的三种雀形目鸟类没有严格遵守双峰活动模式。取而代之的是，这些鸟类全年会表现出各种活动方式，这些活动方式因营养协会和栖息地类型而异。活动模式的这些改变可能是一种适应措施，可在面临温度依赖性食物供应的情况下最大程度地减少捕食和饥饿的风险。

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  • 来源
    《Polar biology》 |2015年第3期|401-411|共11页
  • 作者

    Ronnie Reyes-Arriagada; Jaime E. Jimenez; Ricardo Rozzi;

  • 作者单位

    Estacion de Campo Parque Etnobotanico Omora, Universidad de Magallanes, Puerto Williams, Chile,Direccion de Extension, Universidad Austral de Chile, Casilla 567, Valdivia, Chile;

    Estacion de Campo Parque Etnobotanico Omora, Universidad de Magallanes, Puerto Williams, Chile,Sub-Antarctic Biocultural Conservation Program, University of North Texas (UNT), Denton, TX, USA,Department of Biological Sciences, UNT, Denton, TX 76203, USA;

    Estacion de Campo Parque Etnobotanico Omora, Universidad de Magallanes, Puerto Williams, Chile,Sub-Antarctic Biocultural Conservation Program, University of North Texas (UNT), Denton, TX, USA,Department of Philosophy and Religion Studies, UNT, Denton, TX 76302, USA;

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

    Daily activity; Passerines; Cape Horn; Trophic guild; Starvation-predation;

    机译：日常活动;雀形目;合恩角;营养公会;饥饿捕食;

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