在沉默的春天里唱歌:鸟类在COVID-19关闭期间对半个世纪的声音景观回应
Elizabeth P Derryberry1, Jennifer N Phillips2,3, Graham E Derryberry4
1Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA. liz@utk.edu.
概括
在COVID-19疫情期间,城市噪音水平大幅下降,使得歌鸟能够制作更高质量的歌曲. 这表明鸟类
科学领域:
- 生态学
- 生物声学
- 动物的行为
背景情况:
- 随着COVID-19大流行,机动车辆流量减少,城市噪音污染也减少.
- 依赖声音生存和繁殖的动物可能会从更安静的环境中受益.
- 人为噪音污染对野生动物传播构成重大挑战.
研究的目的:
- 调查歌唱鸟如何适应 COVID-19 封锁期间减少的城市噪音.
- 评估人类噪声降低对鸟类声学通讯的影响.
主要方法:
- 在COVID-19封锁之前和期间对旧金山湾区的声音景观和鸟类歌曲进行比较分析.
- 测量噪声水平和歌曲特征 (幅度,频率,性能).
主要成果:
- 城市噪音水平在封锁期间显著下降,回到了自20世纪50年代以来的水平.
- 在较低的振幅下产生更高性能的歌曲.
- 这些歌曲的修改使得在安静的环境中沟通的距离和突出程度最大化.
结论:
- 随着噪音污染的减少, 歌鸟迅速调整了自己的声音.
- 这种行为可塑性凸显了野生动物对人为压力的性.
- 这些发现强调了快速适应环境变化的潜力.
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