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Dr Chen completed her PhD at Dalhousie University in May 2025 and joined my lab as a postdoc this fall. The talk title and abstract and virtual connection information are below. We have a great lineup of speakers this semester:
Title:
Tracking Arctic/Subarctic Export Production Variability Using Compound-Specific Isotope Analysis of Amino Acids
Abstract:
The Arctic and subarctic seas have been experiencing dramatic reductions in sea ice extent as a result of climate change, which are expected to impact the timing, composition, and quality of export production that supports deep-water benthic food webs in Arctic and subarctic ecosystems. Amino acid stable isotopes of C and N have been proven to provide specific information about C and N sources, shifts in nutrient sources, and physiological and heterotrophic processing of the organisms. In this talk, I will provide an overview of the amino acid stable isotope approach with a focus on marine biogeochemical and ecological studies. Using the results from my previous research on the biological pump in the Canadian Arctic and subarctic seas, I will demonstrate how amino acid stable isotopes better our understanding of C and N sources and heterotrophic processing in sinking organic particles, and their long-term preservation in marine sediments.
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