Contaminant Biology

Pesticides and Pesticide Degradates

Filter Total Items: 22
Date published: March 16, 2021
Status: Completed

Clothianidin Exposure Associated with Changes in Tadpole Behavior

During a laboratory exposure study, tadpole movement decreased with increased concentrations of clothianidin, a neonicotinoid pesticide. Decreased movement could affect a tadpole’s ability to forage, escape predation, and metamorphose before ponds dry.

Date published: April 22, 2019
Status: Active

No Evidence of Toxicity to Birds Ingesting Neonicotinoid-Coated Wheat Seeds During Controlled Laboratory Study

Scientists determined what happens to the neonicotinoid insecticide, imidacloprid, on coated wheat seeds once ingested by Japanese quail (Coturnix japonica)—a model species for free-range, seed-eating, upland game birds. Imidacloprid was found to be rapidly adsorbed, metabolized, and excreted, and resulted in no overt signs of toxicity during a controlled laboratory study.

Date published: September 26, 2018
Status: Active

Can There be Unintended Benefits when Wastewater Treatment Infrastructure is Upgraded?

Science from the U.S. Geological Survey (USGS) and other entities has shown that a mixture of natural and synthetic estrogens and other similar chemicals are discharged from wastewater treatment plants (WWTPs) to streams and rivers.

USGS and University of Colorado hydrologists, chemists, geologists, and biologists studied the chemistry and biology of Boulder Creek downstream of Boulder ...

Date published: September 11, 2018
Status: Active

Food Resources Science Team

The team studies the movement of toxicants and pathogens associated with food production through watersheds and aquifers, to water resources where exposure can occur. That information is used to understand if there are adverse effects upon exposure and to develop decision tools to protect health.

Date published: September 11, 2018
Status: Active

Land Stewardship Science Team

The Land Stewardship Integrated Science Team focuses on the potential for contaminant exposures in the environment that might originate from land management activities like wildfire and dust suppression, vector control (for example: mosquitos and rodents) and invasive species (Asian carp and nuisance plants). Perceived health risks to humans and other organisms will be...

Date published: September 7, 2018
Status: Completed

Unique Methods Used to Understand Frog Exposure to Pesticides in Agricultural Settings

Adult frog exposure to pesticides in aquatic and terrestrial habitats was quantified using a novel combination of radio telemetry and passive sampling techniques to better understand factors affecting frog health and survival in agricultural landscapes.

Contacts: Kelly Smalling
Date published: August 30, 2018
Status: Active

Bioactive Chemicals Research Laboratory

The Bioactive Chemicals Research Laboratory applies a collaborative transdisciplinary approach to conduct research to minimize the risk to human and aquatic organism health from exposure to contaminants in water supplies.

Date published: August 29, 2018
Status: Active

Environmental Chemistry — Columbia, Missouri

About the Research

The Environmental Health Program collaborates with scientists at the Environmental Chemistry Laboratory at the Columbia Environmental Research Center, Missouri, develops and applies innovative methods of sampling and analysis to answer critical questions about the occurrence, distribution, fate and transport, and biological exposure of chemical in all...

Date published: August 29, 2018
Status: Active

Organic Geochemistry Research — Lawrence, Kansas

About the Research

The Environmental Health Program collaborates with chemists and geologists at the Kansas Water Science Center's Organic Geochemistry Research Laboratory (OGRL) to develop targeted and non-targeted analytical methods for the identification and quantitation of chemicals that can impact the health of humans and other organisms and use bioassays to screen...

Date published: August 28, 2018
Status: Active

Organic Chemistry Research — Sacramento, California

About the Research

The Environmental Health Program collaborates with chemists and hydrologists at the Organic Chemistry Research Laboratory (OCRL) to develop targeted analytical methods for the quantitation of chemicals that can impact the health of organisms and humans. The scientists have developed methods in a wide variety of environmental media; in addition to...

Date published: August 23, 2018
Status: Active

Fishing and Hunting Science Team

The Fishing and Hunting integrated science team focuses on contaminant and pathogen exposures in the environment that could impact the presence and vitality of fish and wildlife populations that drive commercial, recreational and subsistence activities such as hunting and fishing. If actual risks are identified this project will inform how to economically and effectively minimize...

Date published: December 4, 2017
Status: Completed

Scientists Examined Native Pollinator Exposure Risk to Neonicotinoids in Native Prairie Strips

Neonicotinoids were not detected in native prairie plants placed next to agricultural fields several years after discontinuation of neonicotinoid seed treatment. In addition, neonicotinoid concentrations were lower or absent in soils and runoff at sites with the native prairie strips.