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SSA could not be possible without the generous support of Drs. Herbert A. and Betty Lou Lubs and the Science, Society, and the Arts Research Conference Endowment. We are deeply grateful!
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Friday, March 17 • 3:00pm - 4:15pm
Easel 37: Dating lacustrine molluscan subfossil assemblages using AAR techniques to assist in reconstructing the paleocommunities of temperate Wisconsin lakes

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While numerous environmental conservation studies focus on recent conditions, conservation paleobiology uses the geologic record to establish environmental baselines from which to analyze deviation. Paleoecological reconstructions of lacustrine ecosystems inform assessments of fluctuating environmental quality. Here, we present data from surface and core-collected molluscan subfossil assemblages from a remediated Wisconsin lake. To estimate the degree of time-averaging in the core’s assemblages, we selected gastropods from throughout the core for amino acid racemization dating with radiocarbon calibration. Understanding the degree of time-averaging allows us to more accurately interpret data on paleocommunities. We can determine the effectiveness of current lake remediation practices in recovering molluscan communities by comparing the time-averaged species compositions to recent assemblages. If lacustrine remediation efforts have succeeded in reducing anthropogenic pressures, we would find a return of the molluscan communities to a baseline-like state. This reconstruction can be correlated with other proxy records to inform future conservation efforts.


Friday March 17, 2017 3:00pm - 4:15pm
Leyburn Library