2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/20/2019 | 12:15 PM - 12:30 PM | ENGINEERED NANOPARTICLES ALTER INSECT EMERGENCE AND RESULT IN FLUX OF METALS FROM AQUATIC TO TERRESTRIAL FOOD WEBS | 251 AB

ENGINEERED NANOPARTICLES ALTER INSECT EMERGENCE AND RESULT IN FLUX OF METALS FROM AQUATIC TO TERRESTRIAL FOOD WEBS

Freshwater ecosystems are exposed to engineered nanoparticles through discharge from wastewater and agricultural runoff. We conducted an experiment to examine the combined effects of chronic dosing of nanoparticles and nutrients on insect emergence. Three levels of nanoparticles (control, gold, copper) were crossed by two levels of nutrients (ambient vs. enriched nutrient dosing) in 18 outdoor wetland mesocosms. We estimated emergent insect abundance, community structure and flux of copper and gold nanoparticles from aquatic ecosystems to adjacent terrestrial environments, monthly over a nine-month experiment. We detected significant decrease in insect emergence after exposure to nanoparticles in some months and a flux of nanoparticles from treated mesocosms. These results have implications for terrestrial subsidies and contaminations in insectivorous terrestrial and riparian food webs.

Ecotoxicology
Invertebrate
Multi-stressors

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Presenters/Authors

Brittany Perrotta (), Baylor University, bperrotta16@gmail.com;