2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 2:15 PM - 2:30 PM | EFFECTS OF ARTIFICIAL NIGHT LIGHTING ON FRESHWATER LITTORAL ECOSYSTEMS | 301A
EFFECTS OF ARTIFICIAL NIGHT LIGHTING ON FRESHWATER LITTORAL ECOSYSTEMS
Artificial night lighting (ANL) has increased concurrently with human habitation along freshwater shorelines, which may influence the transfer of resources between aquatic and riparian ecosystems. We expected to find a greater abundance of riparian spiders, and adult aquatic and terrestrial insects, in littoral areas exposed to ANL. We also expected changes in benthic-macroinvertebrate-community composition since ANL extends foraging conditions for predatory fish. To test these predictions, we installed 20 1x1m enclosures in the littoral zone of Haven Hill Lake in Southeast Michigan (USA). We used a 2x2 factorial design; 10 enclosures were illuminated with 4 solar-powered LED “path-lights” and 10 housed pumpkinseed sunfish. We measured and analyzed benthic community composition, organic-matter decomposition, algal and macrophyte biomass, riparian spider density and biomass, and terrestrial invertebrate input. ANL increased riparian spider density and biomass by 101% and 51% respectively, and insect density by 139%. ANL also significantly altered terrestrial invertebrate community composition. No significant differences were found in benthic-invertebrate-community composition among light or fish treatments. We concluded that the influence of ANL on the transfer of resources across the aquatic-riparian boundary may have consequences for maintaining shoreline ecosystems.
- C07 Lentic Ecology
- C22 Disturbance
- C28 Land-Water Interfaces
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Presenters/Authors
Elizabeth Parkinson
(), Dept. Biological Sciences, Oakland University, emparkinson@oakland.edu;
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Scott Tiegs
(), Dept. of Biological Sciences, Oakland University, tiegs@oakland.edu;
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