TEASING OUT ANTHROPOGENIC FROM NATURAL PERTURBATION ON THE LAKE GEORGE ECOSYSTEM – EVIDENCE FROM NON-POLLEN PALYNOMORPHS IN “POLLEN SLIDES”
Microfossils in sediment archives record long-term environmental trends that can be compared to changes in water quality (e.g., salt and nutrient loading) measured since 1980 (Boylen et al., 2014), allowing the natural signature to be separated from the anthropogenic impact. Increased abundances of green algal palynomorphs in ragweed pollen-rich sediments confirm the impact of humans over the past few centuries, particularly in the southern basin.
Boylen, C.W., L.W. Eichler, M.W. Swinton, S.A. Nierzwicki-Bauer, I.A. Hannoun and J.W. Short. 2014. The State of the Lake: Thirty Years of Water Quality Monitoring on Lake George, New York, 1980-2009. 72 pp. http://fundforlakegeorge.org/StateoftheLake.
Kornecki et al. in prep. Calibrating paleo-biomonitors in Lake George, NY sediments with modern geochemical and limnological measurements. Manuscript intended for Journal of Paleolimnology
McCarthy et al. in press. Algal palynomorphs as proxies of human impact on freshwater resources in the Great Lakes region. Anthropocene ANCENE158