[pccgrads] Fwd: NWFSC's Virtual Monster Jam on 10/6: Megan Feddern (University of Alaska Fairbanks)

[UW Program On Climate Change]

---------- Forwarded message ---------
From: Monster Seminar Jam - NOAA Service Account <nwfsc.monsterjam at noaa.gov>
Date: Fri, Sep 30, 2022 at 4:16 PM
Subject: NWFSC's Virtual Monster Jam on 10/6: Megan Feddern (University of
Alaska Fairbanks)
To:




Megan Feddern, PhD

Postdoctoral Researcher, University of Alaska Fairbanks



"Using amino acid stable isotopes from pinniped museum specimens to trace a
century of environmental change through northeast Pacific food webs"



WHEN

Thursday, Oct 6, 2022 at 11:00 AM PT



SEMINARS ARE VIRTUAL ONLY

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ABSTRACT

Physical environments are changing globally due to anthropogenic impacts
which have the potential to alter ecological interactions. To understand
how ecological interactions are changing, long-term datasets are necessary
to document ecological baselines from the past that are comparable to
current ecological conditions. Compound-specific stable isotope analysis
(CSIA) of amino acids can be used as a useful chemical tracer for
retrospective analyses which can elucidate changes in biogeochemistry and
trophic interactions that influence food webs. Here, we apply CSIA to
museum skull specimens from two species of pinnipeds in the northeast
Pacific, harbor seals (Phoca vitulina) and Steller sea lions (Eumetopias
jubatus), to evaluate ecological responses to physical conditions in the
northeast Pacific. Altogether, this work shows CSIA is a useful tracer for
elucidating long-term physical forcing mechanisms on food webs and changes
in food web structure through time as indicated by top predator trophic
position.



BIOGRAPHY

Megan is a climate ecologist, data scientist, and graphic designer.
Currently she is a postdoctoral researcher at University of Alaska
Fairbanks in the Cunningham Lab working on climate drivers of Chinook
salmon population dynamics in the Arctic/Yukon/Kuskokwim region.
Previously, Megan was a Ph.D candidate in the Holtgrieve Ecosystem Ecology
Lab where she earned her degree in Aquatic and Fishery Sciences with a
certificate in Data Science through the UW eScience Institute. Her
dissertation research used compound specific stable isotope analysis of
amino acids to understand changes in primary productivity and foraging
ecology of pinnipeds in the northeast Pacific using museum skull specimens.
She also investigated the impacts of salmon derived nutrients on riparian
soil nitrogen cycling. Megan was a NMFS-Sea Grant Population Dynamics and
Ecosystem Fellow and Washington Sea Grant Fellow.



SEMINAR CO-CHAIRS

Paul Chittaro and Irvin Schulz


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-- 
"The University of Washington acknowledges the Coast Salish peoples of this
land, the land which touches the shared waters of all tribes and bands
within the Suquamish, Tulalip and Muckleshoot nations."



@uwpcc    pcc.uw.edu   uwpcc at uw.edu
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