EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2021 | 8:30 AM - 10:30 AM | A LABORATORY SYSTEM FOR PFAS BIOACCUMULATION IN AQUATIC FOOD WEBS | Virtual Platform
A LABORATORY SYSTEM FOR PFAS BIOACCUMULATION IN AQUATIC FOOD WEBS
Per- and polyfluoroalkyl substances (PFAS) are a ubiquitous and diverse class of “forever chemicals” that are gaining international attention as contaminants of concern. Many of these compounds have been detected in aquatic organisms in nature. It remains unclear how the widely varying structural characteristics of these chemicals affect their bioaccumulation potential. Additionally, it is not possible to elucidate the relative contributions of direct aqueous uptake versus dietary trophic transfer in field-caught organisms. To address these questions, we devised a lab-based strategy to investigate how PFAS accumulate in primary producers (periphyton), primary consumers (the lab-reared mayfly, N. triangulifer), and secondary consumers (D. rario). In our preliminary studies we exposed periphyton and mayfly larvae to mixtures of two PFAS, GenX and PFOA, at environmentally relevant aqueous concentrations. Data tentatively suggest that surface sorption may play a larger role than uptake in periphyton, and that dietary uptake may play a larger role than aqueous uptake in larvae. Further refinement of our approach will allow us to quantify the accumulation of various PFAS moving within the lowest trophic levels of an aquatic food web.
- Food webs
- Anthropogenic
- Pollution
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Presenters/Authors
Anna Boatman
(), North Carolina State University, akboatma@ncsu.edu;
ASHA DISCLOSURE:
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Nonfinancial -