Zou Wenyu, Wu Pan, Wei Xinyi, Zhou Daying, Deng Yingchun, Jiang Yunke, Luo Bo, Liu Wenqin, Huo Jiaxin, Peng Shichen, Feng Jiang
Key Laboratory of Southwest China Wildlife Resources Conservation of Ministry of Education, China West Normal University, Nanchong, China.
Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China.
Integr Zool. 2024 Jul;19(4):710-720. doi: 10.1111/1749-4877.12787. Epub 2023 Nov 21.
Artificial light at night has been considered an emerging threat to global biodiversity. However, the impacts of artificial light on foraging behavior in most wild animals remain largely unclear. Here, we aimed to assess whether artificial light affects foraging behavior in Asian parti-colored bats (Vespertilio sinensis). We manipulated the spectra of light-emitting diode (LED) lighting in a laboratory. Using video and audio recording, we monitored foraging onset, total foraging time, food consumption, freezing behavior (temporary cessation of body movement), and echolocation vocalizations in triads of bats under each lighting condition. Analyses showed that the foraging activities of experimental bats were reduced under LED light. Green, yellow, and red light had greater negative effects on bats' foraging onset, total foraging time, and food consumption than white and blue light. LED light of different spectra induced increased freezing time and echolocation vocalizations in captive bats, except for the white light. The peak wavelength of light emission correlated positively with freezing time, estimated echolocation pulse rate (the number of echolocation pulses per minute), and foraging onset, but negatively with total foraging time and food consumption. These results demonstrate that artificial light disturbs foraging behavior in Asian parti-colored bats. Our findings have implications for understanding the influencing mechanism of light pollution on bat foraging.
夜间人工照明已被视为对全球生物多样性的一种新出现的威胁。然而，人工光对大多数野生动物觅食行为的影响在很大程度上仍不清楚。在此，我们旨在评估人工光是否会影响中华山蝠（Vespertilio sinensis）的觅食行为。我们在实验室中操控发光二极管（LED）照明的光谱。利用视频和音频记录，我们监测了每组照明条件下三只蝙蝠的觅食开始时间、总觅食时间、食物消耗量、静止行为（身体运动的暂时停止）以及回声定位叫声。分析表明，在LED光下实验蝙蝠的觅食活动减少。绿光、黄光和红光对蝙蝠的觅食开始时间、总觅食时间和食物消耗量的负面影响大于白光和蓝光。除白光外，不同光谱的LED光会使圈养蝙蝠的静止时间和回声定位叫声增加。发光的峰值波长与静止时间、估计的回声定位脉冲率（每分钟回声定位脉冲的数量）和觅食开始时间呈正相关，但与总觅食时间和食物消耗量呈负相关。这些结果表明，人工光会干扰中华山蝠的觅食行为。我们的研究结果对于理解光污染对蝙蝠觅食的影响机制具有启示意义。
