Item talk:Q45547

usgs_staff_profile:

 meta:
   status_code: 200
   timestamp: '2023-09-30T17:01:01.450711'
   url: https://www.usgs.gov/staff-profiles/marie-noele-croteau
 profile:
   abstracts: []
   affiliations: []
   education:
   - PhD. 2002. Water and Environmental Sciences, University of Quebec (INRS-ETE),
     Canada
   - M.Sc. 1997. Water and Environmental Sciences, University of Quebec (INRS-ETE),
     Canada
   email: mcroteau@usgs.gov
   expertise_terms:
   - aquatic ecosystems
   - contamination and pollution
   - mine drainage
   - toxic trace element contamination
   honors: []
   intro_statements:
   - Marie came to the USGS in September 2002 as a postdoctoral fellow to study the
     bioavailability and bioaccumulation of metals in freshwater food webs. Her work
     focused on understanding how metals are transferred through food webs and how
     trophic position in a food web influences exposure to metals.
   name: Marie Noele Croteau, Ph.D.
   name_qualifier: null
   orcid: 0000-0003-0346-3580
   organization_link: https://www.usgs.gov/centers/gmeg
   organization_name: Geology, Minerals, Energy, and Geophysics Science Center
   personal_statement: Marie used nitrogen and carbon stable isotopes to show that
     cadmium, in contrast to copper, could be magnified along certain freshwater
     food webs. This suggests that processes that drive Cd trophic transfer are more
     complex than that of organo-metals, metalloids and organic contaminants.In addition
     to her work on metal trophic transfer, she refined an approach that involves
     the use stable metal isotopes (rather than radioisotopes) to describe accumulation
     and loss dynamics in freshwater invertebrates. Characterization of bioaccumulation
     dynamics is critical to understanding risks associated with contaminant exposure
     in organisms. For instance, this tracing technique allowed showing that a slow
     rate constant of loss for Cu likely explains the elevated levels of this toxic
     trace metal found in molluscs in nature, and that diet is an important bioaccumulation
     pathway for metals for several aquatic species.She used biodynamic modeling
     and the enriched stable isotope tracers in novel ways to understand the fate
     and effects of nanosized metals in aquatic organisms as well as to investigate
     how the geochemical properties of mineral particles consumed by organisms affect
     their bioavailability.
   professional_experience: []
   title: Research Biologist