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Author Henn, M.; Nichols, H.; Zhang, Y.; Bonner, T.H.
Title (up) Effect of artificial light on the drift of aquatic insects in urban central Texas streams Type Journal Article
Year 2014 Publication Journal of Freshwater Ecology Abbreviated Journal Journal of Freshwater Ecology
Volume 29 Issue 3 Pages 307-318
Keywords light pollution; stream ecology; urban ecology; drift; abiotic factors; Baetidae; Chironomidae; insects; Texas; Simuliidae; Edwards Plateau; light at night; ecology
Abstract Light pollution can reduce night time drift of larval aquatic insects in urban streams by disrupting their circadian rhythms. Previous studies on larval insect drift show that disruption in drift leads to changes in reproduction as well as intraspecific and interspecific interactions. The purpose of this study was to conduct a preliminary investigation into the effects of extreme artificial light on insect drift in urbanized, high clarity spring systems of the karst Edwards Plateau, TX. We quantified taxa richness, diversity, and abundance in aquatic insect night time drift under two treatments (ambient night time light and artificial light addition) and among five streams using a paired design. Richness and diversity of drifting aquatic insects were similar between treatments but abundance was 37% less in the light addition treatment than that of the control. Effects of light addition on mean abundance was more notable in large streams with a 58% decrease in Simuliidae (compared to that of the control) and 51% decrease in Baetidae. Reduced drift from light addition suggests the potential of artificial lighting disrupting insect drift and consequently community structure. Results of this experiment support a growing body of knowledge on how urbanized systems influence stream communities.
Address Department of Biology/Aquatic Station, Texas State University, San Marcos, TX, USA
Corporate Author Thesis
Publisher Taylor & Francis Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0270-5060 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 312
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