Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands.
Plant Ecology and Nature Conservation Group, Wageningen University, Wageningen, The Netherlands.
J Exp Zool A Ecol Integr Physiol. 2018 Oct;329(8-9):506-510. doi: 10.1002/jez.2178. Epub 2018 May 29.
Progressive illumination at night poses an increasing threat to species worldwide. Light at night is particularly problematic for bats as most species are nocturnal and often cross relatively large distances when commuting between roosts and foraging grounds. Earlier studies have shown that illumination of linear structures in the landscape disturbs commuting bats, and that the response of bats to light may strongly depend on the light spectrum. Here, we studied the impact of white, green, and red light on commuting Daubenton's bats (Myotis daubentonii). We used a unique location where commuting bats cross a road by flying through two identical, parallel culverts underneath. We illuminated the culverts with white, red, and green light, with an intensity of 5 lux at the water surface. Bats had to choose between the two culverts, each with a different lighting condition every night. We presented all paired combinations of white, green, and red light and dark control in a factorial design. Contrary to our expectations, the number of bat passes through a culvert was unaffected by the presence of light. Furthermore, bats did not show any preference for light color. These results show that the response of commuting Daubenton's bats to different colors of light at night with a realistic intensity may be limited when passing through culverts.
夜间的渐进式照明对全球物种构成的威胁日益增加。夜间的光线对蝙蝠来说尤其成问题，因为大多数蝙蝠都是夜间活动的，在栖息地和觅食地之间迁徙时经常会穿越相对较大的距离。早期的研究表明，景观中线性结构的照明会干扰迁徙中的蝙蝠，而蝙蝠对光的反应可能强烈依赖于光的光谱。在这里，我们研究了白光、绿光和红光对迁徙的巴氏蝙蝠（Myotis daubentonii）的影响。我们使用了一个独特的地点，迁徙中的蝙蝠通过两条相同的平行涵洞下面飞过马路。我们用 5 勒克斯的强度在涵洞水面上照射白光、红光和绿光。蝙蝠必须在两条涵洞之间做出选择，每天晚上涵洞的照明条件都不同。我们以析因设计呈现了白光、绿光和红光以及黑暗对照的所有配对组合。与我们的预期相反，蝙蝠通过涵洞的数量不受光的存在的影响。此外，蝙蝠对光的颜色没有表现出任何偏好。这些结果表明，当蝙蝠通过涵洞时，它们对夜间具有实际强度的不同颜色的光的反应可能受到限制。
