社会和物理环境变化的影响,在混合物种群中对抗捕食者的行为
Colton B Adams1,2, Monica Papeş1,3, Charles A Price3
1Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, United States of America.
PloS one
|December 21, 2023
概括
像这样的群鸟根据群体组成和环境因素 (如噪音和植被) 调整反捕食者的行为. 这些调整取决于感知到的威胁是听觉还是视觉的.
科学领域:
- 行为生态学 行为生态学
- 鸟类生态学 鸟类生态学
- 动物沟通动物沟通
背景情况:
- 混合种类的鸟群,包括,和,在冬季形成.
- 以前的研究表明,和小鼠的行为受到群体组成的影响.
- 噪音和植被等环境因素对这些群体抗捕食者行为的影响仍然未得到充分研究.
研究的目的:
- 为了研究植被密度,交通噪音和群体组成如何影响混合物种鸟群的反捕食者行为.
- 检查对声学 (报警呼叫播放) 和视觉 (猫头模型) 捕食者线索的反应.
主要方法:
- 实地研究是在装有种子的料箱上进行的.
- 记录了交通噪音水平,并使用激光雷达扫描量化了植被密度.
- 在播放或模型演示后,测量了反捕食者反应 (种子采集,呼叫,骚扰延迟和骚扰持续时间),分析了群体组成 (具体数量,多样性,大小).
主要成果:
- 在响应警报时,群体组成影响了和小鼠的行为,而植被密度影响了和小鼠的行为.
- 在猫头模型的演示中,同类型的数量预测了小的行为,小的数量预测了暴徒的持续时间.
- 个别鸟类在模拟风险下表现出对抗掠食者和食行为的群组组成的敏感性.
结论:
- 混合物种群中的鸟类行为受到群体组成,感知风险模式 (声学与视觉) 和植被密度的显著影响.
- 这些发现突出了社会动态,环境背景和食鸟群中的反掠食者策略之间的复杂相互作用.
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