Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits
Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits
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DOI：
10.1177/0748730417719168
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发表时间：
2017-08-01
影响因子：
3.5
通讯作者：
Visser, Marcel E.
中科院分区：
文献类型：
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作者：
de Jong, Maaike;Caro, Samuel P.;Visser, Marcel E.
夜间的人造光扰乱了许多生物体的日常节律。这种扰动在多大程度上取决于光的强度和光谱组成仍然不清楚。在这里，我们测量了圈养的蓝山雀（蓝山雀）在夜间暴露在相似强度的绿色、红色或白光下的日常活动模式。在所有的光色下，鸟类的活动在早晨开始，但在红光和白光下比在绿光下更多。在所有浅色中，活动的偏移都略有延迟。24小时内的总活动没有变化，但鸟类将日常活动的一部分移到了夜间。由于红光和白光的效果具有可比性，我们在后续实验中测试了光强度的影响，在实验中，我们只比较了不同强度的绿光和白光下鸟类的活动。而在较高的强度范围内，白光和绿光的效果是相当的；与白光相比，在较低强度下，绿光对蓝山雀日常节律的干扰作用较小。我们的研究结果表明，这种干扰的程度可以通过调制室外照明的光谱特性和强度来减轻，现在通过使用LED照明是可行的。
Artificial light at night disturbs the daily rhythms of many organisms. To what extent this disturbance depends on the intensity and spectral composition of light remain obscure. Here, we measured daily activity patterns of captive blue tits (Cyanistes caeruleus) exposed to similar intensities of green, red, or white light at night. Birds advanced their onset of activity in the morning under all light colors but more under red and white light than under green light. Offset of activity was slightly delayed in all light colors. The total activity over a 24-h period did not change but birds moved a part of their daily activity into the night. Since the effect of red and white lights are comparable, we tested the influence of light intensity in a follow-up experiment, where we compared the activity of the birds under different intensities of green and white light only. While in the higher range of intensities, the effects of white and green light were comparable; at lower intensities, green light had a less disturbing effect as compared with white light on daily rhythms in blue tits. Our results show that the extent of this disturbance can be mitigated by modulating the spectral characteristics and intensity of outdoor lighting, which is now feasible through the use of LED lighting.