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首页> 外文期刊>Ecological indicators >The effects of artificial light at night on Eurasian tree sparrow (Passer montanus): Behavioral rhythm disruption, melatonin suppression and intestinal microbiota alterations
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The effects of artificial light at night on Eurasian tree sparrow (Passer montanus): Behavioral rhythm disruption, melatonin suppression and intestinal microbiota alterations

机译：夜间人造光对欧亚树麻雀（Passer montanus）的影响：行为节律破坏，褪黑激素抑制和肠道菌群改变

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摘要

Artificial light at night (ALAN) or light pollution is rapidly widespread with fast urbanization and becomes an obvious environmental disturbance. Recent studies showed ALAN has multiple negative impacts on a wide range of species including bird biological rhythm disruption, behavioral and physiological disturbance and hormone secretion disorder. However, its effects on bird gut microbiota are scarcely studied. In this study, we used Eurasian tree sparrow (Passer montanus), a widely distributed and locally abundant bird species in both urban and rural areas of China to examine the effects of ALAN on locomotor activity rhythm and melatonin secretion, and species diversity and community structure of intestinal microbiota by simulating urban and rural night light environment. Our results showed ALAN strongly affected circadian rhythm of locomotor activity with earlier start of activity before light-on and later rest after light-off. Moreover, ALAN significantly suppressed melatonin release. Last but not least, ALAN profoundly affected taxonomic compositions, species diversity and community structure of intestinal microbiota of birds. We concluded that ALAN may cause bird health damage by disrupting circadian rhythm, inhibiting melatonin release and altering intestinal microbiota. Melatonin hormone level and intestinal microbiota diversity may be important bioindicators for light pollution.
机译：夜间人造光（ALAN）或光污染随着城市化的快速发展而迅速普及，并成为明显的环境干扰。最近的研究表明，ALAN对广泛的物种具有多种负面影响，包括鸟类的生物节律紊乱，行为和生理紊乱以及激素分泌紊乱。然而，很少研究其对鸟类肠道菌群的影响。在这项研究中，我们使用欧亚树麻雀（Passer montanus）（一种分布在中国城乡的分布广泛的鸟类）来研究ALAN对运动活动节奏和褪黑激素分泌以及物种多样性和群落结构的影响。通过模拟城市和农村的夜间光照环境来分析肠道菌群。我们的研究结果表明，ALAN强烈影响运动活动的昼夜节律，在开灯之前较早开始活动，而在熄灯后较早休息。此外，ALAN显着抑制了褪黑激素的释放。最后但并非最不重要的一点是，ALAN深刻影响了鸟类肠道菌群的生物分类组成，物种多样性和群落结构。我们得出的结论是，ALAN可能通过破坏昼夜节律，抑制褪黑激素释放和改变肠道菌群而导致鸟类健康受损。褪黑激素水平和肠道菌群多样性可能是光污染的重要生物指标。

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