Larval amphibians rapidly bioaccumulate poly- and perfluoroalkyl substances.

Authors:
Linda S Lee
Linda S Lee
Purdue University
United States
Jason T Hoverman
Jason T Hoverman
University of Colorado
United States

Ecotoxicol Environ Saf 2019 Aug 16;178:137-145. Epub 2019 Apr 16.

Department of Forestry and Natural Resources, Purdue University, 715 West State Street, West Lafayette, IN, 47907, United States.

Poly- and perfluoroalkyl substances (PFAS) are ubiquitous contaminants that can bioaccumulate in aquatic taxa. Amphibians are particularly vulnerable to contaminants and sensitive to endocrine disruptors during their aquatic larval stage. However, few studies have explored PFAS uptake rates in amphibians, which is critical for designing ecotoxicology studies and assessing the potential for bioaccumulation. Uptake rates of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were measured for larval northern leopard frogs (Rana pipiens), American toads (Anaxyrus americanus), and eastern tiger salamanders (Ambystoma tigrinum) during a 240-h exposure to 10 and 1000 μg/L concentrations. We measured body burden and calculated bioconcentration factor (BCF) every 48 h during the experiments. For all species and exposures, body burdens often reached steady state within 48-96 h of exposure. Steady-state body burdens for PFOA and PFOS ranged from 3819 to 16,481 ng/g dry weight (BCF = 0.46-2.5) and 6955-489,958 ng/g dry weight (47-259 BCFs), respectively. Therefore, PFAS steady state occurs rapidly in the larval amphibians we studied and particularly for PFOS. This result reflects a high potential for PFAS trophic transfer because amphibians are often low in trophic position and are important prey for many aquatic and terrestrial species.

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S01476513193043
Publisher Site
http://dx.doi.org/10.1016/j.ecoenv.2019.04.022DOI Listing
August 2019
4 Reads

Publication Analysis

Top Keywords

body burdens
8
perfluoroalkyl substances
8
uptake rates
8
poly- perfluoroalkyl
8
dry weight
8
larval amphibians
8
steady state
8
bioconcentration factor
4
factor bcf
4
burden calculated
4
measured body
4
body burden
4
bcf 48 h
4
calculated bioconcentration
4
experiments species
4
burdens reached
4
reached steady
4
exposures body
4
species exposures
4
concentrations measured
4

Similar Publications