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http://dx.doi.org/10.3390/ijerph21060689 | DOI Listing |
Sci Total Environ
January 2025
Department of Natural Resource Sciences, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada. Electronic address:
Mercury (Hg) and persistent organic pollutant (POP) accumulation among species and biomagnification through food webs is typically assessed using stable isotopes of nitrogen (δN) and carbon (δC) in bulk (whole) tissues. Yet, bulk isotopic approaches have limitations, notably from the potential overlap of isotope values from different dietary sources and from spatial variation in source (baseline) signals. Here, we explore the potential of fatty acid carbon isotopes (FA δC) to (1) evaluate the trophic structure of a marine food web, (2) distinguish feeding patterns among four marine mammal consumers, (3) trace contaminant biomagnification through a food web, and (4) explain interspecific variation in contaminants among high-trophic position predators.
View Article and Find Full Text PDFGround Water
January 2025
Department of Civil, Geological, and Environmental Engineering, University of Saskatchewan, Saskatoon, SK, Canada.
Continental glaciations during the Pleistocene Epoch created complex systems of aquifers and aquitards across many northern regions of the Earth. The low hydraulic conductivities of glacial till aquitards suggest that limited recharge will reach the underlying aquifers, potentially preserving old groundwaters. Here, we characterize the recharge history in intertill and buried valley aquifers in Saskatchewan, Canada using C, H, He δH, δO, and major ions.
View Article and Find Full Text PDFAIDS Behav
December 2024
Department of Social, Behavioral and Population Sciences, Celia Scott Weatherhead School of Public Health and Tropical Medicine, Tulane University, New Orleans, USA.
J Cataract Refract Surg
December 2024
University of South Dakota Sanford School of Medicine, Sioux Falls, SD, US.
Purpose: To evaluate visual and refractive outcomes in eyes with a history of radial keratotomy (RK) implanted with the second-generation light-adjustable lens (LAL).
Setting: Private practice, multiple locations.
Design: Retrospective, consecutive case series.
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