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United States Department of Agriculture (USDA) 2020

EXAMINING THE IMPACT OF METHYLMERCURY ON WATERFOWL POPULATION DYNAMICS WITH IMPLICATIONS FOR HUMAN HEALTH AND WATER MANAGEMENT IN ARID ENVIRONMENTS

Methylmercury Health Water Arid

United States Department of Agriculture (USDA) National Institute of Food and Agriculture

Titre : EXAMINING THE IMPACT OF METHYLMERCURY ON WATERFOWL POPULATION DYNAMICS WITH IMPLICATIONS FOR HUMAN HEALTH AND WATER MANAGEMENT IN ARID ENVIRONMENTS

Identification : 1024831

Pays : Etats Unis

Durée : START : 02 NOV 2020 TERM : 30 JUN 2023

Résumé
Productive wildlife populations are often used as indicators of healthy agroecosystems. Contaminants that negatively affect wildlife populations provide insight into their effects on humans that use products from the same agroecosystem ; especially when humans consume wildlife affected by contaminants. Waterfowl hunting provides recreational opportunities, economic benefits to small towns, and a sourceof food security to thousands of Americans. Approximately 3,500 people hunt waterfowl in Nevada each year. These hunters harvest an average of 30,000 ducks. Approximately 90,000 ducks breed in Nevada, and more than 600,000 ducks are estimated to travel through Nevada annually.The Carson River and Lahontan Valley account for more than 60% of Nevada duck harvest. The Lahontan Valley receives economic benefits from hunters and waterfowl hunting. This has an important socio-economic significance in Nevada, as well as the potential to influence waterfowl population dynamics at the flyway scale. Ducks banded in Nevada have been harvested and reported by hunters from Alaska to Venezuela. Due to the migratory behavior of waterfowl, birds exposed to contaminants in Nevada are available for harvest throughout the Pacific Flyway. We have obtained a 13-year dataset collected on wood duck population dynamics in Lahontan Valley. Our data set provides a unique opportunity to understand effects of mercury on wildlife populations and wildlife habitat. Specifically, our data set will allow us toExamine survival, reproduction, and the impacts mercury concentration on waterfowlat a fine spatial and temporal resolution,Understand drivers of mercury contamination in wildlife, and human-health implications to consuming contaminated meat,Understand spatial and temporal drivers of mercury concentration and water irrigation management andProvide management recommendations to address results obtained in 1-3, above.The expected outcomes of our research will have direct impacts on Nevada residents. Specifically, we will provide insight to guide : (a) human-health advisories regarding the safe consumption of waterfowl meat harvested in Nevada,(b) Nevada waterfowl management, and (c) irrigation management to support reduced levels of methylmercury concentrations available to wildlife, while continuing to support agricultural production.

Performing Institution : UNIVERSITY OF NEVADA
Investigator : Williams, PE, . ; Gustin, MA, .

Présentation : USDA (NIFA)

Page publiée le 26 novembre 2021