Monster Seminar JAM - Isotopic Dabbling in Oceans and Other Wet Places
Presenter: Dr. Keith Hobson, Prairie & Northern Wildlife Research Center, Canadian Wildlife Service
The measurement of naturally occurring stable isotopes of the light elements C,N,O,H,S to investigate biotic and abiotic aspects of aquatic ecosystems has a long and diverse history. This talk will explore the potential of the isotopic approach to key ecological questions and consider the strengths, weaknesses and potential future of this field of research. Emphasis will be on understanding current and paleodiets of upper trophic level organisms such as marine birds and mammals and will also include consideration of the the tracking of migratory fish and mammals. The combination of stable isotope tools and contaminants measurements has also increased our understanding of how to quantify and compare contaminant biomagnification among aquatic systems and how we might better interpret contaminant trends in marine biota.
Date and Time:
April 19, 2007,
11:00 am - 12:30 pm