磁暴会扰乱候鸟的夜间迁徙活动。
Magnetic storms disrupt nocturnal migratory activity in songbirds.
机构信息
1 Centre for Animal Movement Research, Department of Biology, Lund University , Ecology Building, 223 62 Lund , Sweden.
2 Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences , 2 Gagarin Street, 1113 Sofia , Bulgaria.
出版信息
Biol Lett. 2019 Mar 29;15(3):20180918. doi: 10.1098/rsbl.2018.0918.
Birds possess a magnetic sense and rely on the Earth's magnetic field for orientation during migration. However, the geomagnetic field can be altered by solar activity at relative unpredictable intervals. How birds cope with the temporal geomagnetic variations caused by solar storms during migration is still unclear. We addressed this question by reproducing the effect of a solar storm on the geomagnetic field and monitoring the activity of three songbird species during autumn migration. We found that only the European robin reduced nocturnal migratory restlessness in response to simulated solar storms. At the same time, robins increased activity during early morning. We suggest that robins reduced activity at night when the perception of magnetic information would be strongly disrupted by temporal variations of the magnetic field, to extend their migration during daytime when several visual cues become available for orientation. The other two species, chiffchaff and dunnock, showing low or no nocturnal migratory activity, did not respond to the solar storm by changing activity.
鸟类具有磁性感知能力，并在迁徙过程中依靠地球磁场进行定位。然而，地磁场可能会在相对不可预测的时间间隔内受到太阳活动的影响。鸟类如何应对迁徙过程中太阳风暴引起的暂时地磁变化仍不清楚。我们通过模拟太阳风暴对地球磁场的影响，并监测三种鸣禽在秋季迁徙过程中的活动，来解决这个问题。我们发现，只有欧洲知更鸟减少了对模拟太阳风暴的夜间迁徙不安。与此同时，知更鸟在清晨增加了活动。我们认为，当磁场的暂时变化强烈干扰磁性信息的感知时，知更鸟会减少夜间活动，以在白天延长迁徙时间，因为此时有几个视觉线索可用于定位。另外两种鸣禽，柳莺和麻雀，夜间迁徙活动较少或没有，它们没有通过改变活动来应对太阳风暴。
Zotero 插件