High-intensity urban light installation dramatically alters nocturnal bird migration

Van Doren Benjamin M.; Horton Kyle G.; Dokter Adriaan M.Klinck HolgerElbin Susan B.Farnsworth Andrew

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High-intensity urban light installation dramatically alters nocturnal bird migration

机译：High-intensity urban light installation dramatically alters nocturnal bird migration

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Billions of nocturnally migrating birds move through increasingly photopolluted skies, relying on cues for navigation and orientation that artificial light at night (ALAN) can impair. However, no studies have quantified avian responses to powerful ground-based light sources in urban areas. We studied effects of ALAN on migrating birds by monitoring the beams of the National September 11 Memorial Museum's "Tribute in Light" in New York, quantifying behavioral responses with radar and acoustic sensors and modeling disorientation and attraction with simulations. This single light source induced significant behavioral alterations in birds, even in good visibility conditions, in this heavily photopolluted environment, and to altitudes up to 4 km. We estimate that the installation influenced approximate to 1.1 million birds during our study period of 7 d over 7 y. When the installation was illuminated, birds aggregated in high densities, decreased flight speeds, followed circular flight paths, and vocalized frequently. Simulations revealed a high probability of disorientation and subsequent attraction for nearby birds, and bird densities near the installation exceeded magnitudes 20 times greater than surrounding baseline densities during each year's observations. However, behavioral disruptions disappeared when lights were extinguished, suggesting that selective removal of light during nights with substantial bird migration is a viable strategy for minimizing potentially fatal interactions among ALAN, structures, and birds. Our results also highlight the value of additional studies describing behavioral patterns of nocturnally migrating birds in powerful lights in urban areas as well as conservation implications for such lighting installations.

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《Proceedings of the National Academy of Sciences of the United States of America.》 |2017年第42期|11175-11180|共6页
作者
Van Doren Benjamin M.; Horton Kyle G.; Dokter Adriaan M.Klinck HolgerElbin Susan B.Farnsworth Andrew;
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作者单位

Cornell Lab Ornithol, Informat Sci Program, Ithaca, NY 14850 USA;

Cornell Lab Ornithol, Bioacoust Res Program, Ithaca, NY 14850 USA;

New York City Audubon, New York, NY 10010 USA;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
artificial light; nocturnal migration; remote sensing; radar ornithology; flight calls;

High-intensity urban light installation dramatically alters nocturnal bird migration

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