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Author (up) Bolliger, J. Hennet, T., Wermelinger, B., Blum, S., Haller, J. & Obrist, M.
Title Low impact of two LED colors on nocturnal insect abundance and bat activity in a peri‑urban environment Type Journal Article
Year 2020 Publication Journal of Insect Conservation Abbreviated Journal
Volume Issue Pages
Keywords Animals
Abstract Artifcial light at night (ALAN) is an important driver of change in ecological environments of the 21th century. We investigated the impact on nocturnal insect abundance and bat activity of two LED light colors (warm-white 2700 K, cold-white

6500 K) in a peri-urban environment. Bat activity (predominantly Pipistrellus pipistrellus) was largely driven by prey availability (insects), while insect abundance was responsive to nightly weather conditions (precipitation, temperature). Thus, both insects and bats were not diferentially responsive to cold-white or warm-white LEDs. These fndings are largely in contrast with literature, particularly for insects. However, as most published experiments on ALAN were conducted in areas that were lit solely for the purpose of the experiment, we would like to bring forward that (1) adaptation to environmental constraints may play a role in peri-urban environments that have been exposed to ALAN for many decades; or (2) impacts of cold-white LEDs on nocturnal insects may be lower than expected, because nocturnal insects adapted to low-light conditions may be put of by cold white light sources (6500 K).
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Call Number IDA @ intern @ Serial 2957
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