2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2019 | 2:45 PM - 3:00 PM | NUTRIENT INPUTS MEASURABLY INCREASE SIZE AND DECREASE TIME TO METAMORPHOSIS OF TOADS: A MESOCOSM APPROACH | 254 B
NUTRIENT INPUTS MEASURABLY INCREASE SIZE AND DECREASE TIME TO METAMORPHOSIS OF TOADS: A MESOCOSM APPROACH
Nutrient input in aquatic ecosystems through runoff is a pressing issue as the impacts of globalization continue. Many land-use types, particularly in agricultural and urban landscapes, involve chemical use that can affect water quality, aesthetics, and native organisms via runoff into surface waters. However, experimental examination of how these inputs impact lentic ecosystem fauna are still underway. Our objective was to examine the influence of Nitrogen (N) and Phosphorus (P), and N+P inputs on American toad (Anaxyrus americanus) survival and time to/size at metamorphosis. In spring and summer 2018 we used outdoor mesocosms and treatments including high and low concentrations of N, P, N+P and control (concentrations based on field survey data from golf course lentic ecosystems) in a randomized design with four replicates/treatment. Our results show addition of N and P alone result in larger toads at metamorphosis, but no significant difference in survival or time to metamorphosis. However, the combination of N+P results in larger metamorphic toads that develop at a faster rate. These data suggest inputs of nutrients could create conditions where organisms at higher trophic levels of lentic ecosystems can benefit.
- Eutrophication
- Mesocosm
- Urban
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Presenters/Authors
Joseph Milanovich
(), Loyola University Chicago, jmilanovich@luc.edu;
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Michael Vosburgh
(), Loyola University, mvosburgh1@luc.edu;
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Isabella Lentini
(), Loyola University Chicago, ilentini@luc.edu;
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Martin Berg
(), Loyola University Chicago, mberg@luc.edu;
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