2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 11:15 AM - 11:30 AM | HOW DO ATRAZINE AND SELENIUM IMPACT THE LINK BETWEEN WATER AND LAND? | 301A
HOW DO ATRAZINE AND SELENIUM IMPACT THE LINK BETWEEN WATER AND LAND?
Aquatic insects link aquatic and terrestrial ecosystems through their metamorphosis and subsequent transition from water to land. Chemical stressors in freshwater, such as agricultural contaminants, have the potential to disrupt insect life cycles and reduce the number of insects emerging as terrestrial adults, thereby damaging or severing this linkage. Atrazine and selenium, though frequently detected in waterways and often co-occurring, have not been studied together in controlled experiments previously. We conducted a mesocosms experiment over six weeks in the summer of 2016 to measure the responses of larval and emerging aquatic insects to treatments of atrazine, selenium, and a combination of the two. Preliminary results indicate that during peak emergence, control treatments had 40-60% higher emergence than that of the contaminant treated tanks, but there were no differences among the atrazine, selenium, and combination treatments. These differences were not apparent in samples of benthic insects. Our results indicate that atrazine and selenium, alone and in combination, have the potential to impair linkages between aquatic and terrestrial ecosystems through reduction of aquatic insect emergence, and that the effects of these contaminants may differ between benthic and emerging insects.
- C13 Ecotoxicology
- C11 Community Ecology
- S14 Stressors in linked aquatic-terrestrial ecosystems: New developments and solutions
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Presenters/Authors
Brianna Henry
(), University of South Dakota, b.henry@eagle.clarion.edu;
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Jeff Wesner
(), University of South Dakota, Jeff.Wesner@usd.edu;
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