Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.

Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.
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DOI:
10.1371/journal.pone.0017307
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发表时间:
2011-03-02
期刊:
影响因子:
3.7
通讯作者:
Hölker F
Hölker F
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kyba CC;Ruhtz T;Fischer J;Hölker F

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光和暗的昼夜循环是地球上生命最强烈的环境因素之一。陆地和水生生态系统中的许多物种利用环境光的水平来调节它们的新陈代谢,生长和行为。来自城市地区的人工照明引起的天空辉光破坏了这种自然循环,并已被证明会影响生物体的行为,甚至距离光源数公里。可以假设,增加天空亮度的因素放大了这种“生态光污染”的程度。我们发现,云层覆盖大大放大了天空亮度,由一个因素的10.1内的一个位置的柏林和由一个因素的2.8在32公里,从市中心。我们还表明,在城市内阴天的夜晚比清晰的农村月光下的夜晚更明亮,由4.1的因素。这些结果有重要的影响,在城市地区,这种放大效应以前没有被考虑的choronobiological和时间生态学的研究。
The diurnal cycle of light and dark is one of the strongest environmental factors for life on Earth. Many species in both terrestrial and aquatic ecosystems use the level of ambient light to regulate their metabolism, growth, and behavior. The sky glow caused by artificial lighting from urban areas disrupts this natural cycle, and has been shown to impact the behavior of organisms, even many kilometers away from the light sources. It could be hypothesized that factors that increase the luminance of the sky amplify the degree of this “ecological light pollution”. We show that cloud coverage dramatically amplifies the sky luminance, by a factor of 10.1 for one location inside of Berlin and by a factor of 2.8 at 32 km from the city center. We also show that inside of the city overcast nights are brighter than clear rural moonlit nights, by a factor of 4.1. These results have important implications for choronobiological and chronoecological studies in urban areas, where this amplification effect has previously not been considered.
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