Applications of Trace-Element and Stable-Isotope Geochemistry to Wildlife Issues, Yellowstone National Park and Vicinity
January 2007
in “
Lincoln (University of Nebraska)
”
Studysummary These investigations described in the study demonstrate how geochemical techniques can be applied to biological studies in Yellowstone, finding significant mercury accumulation in trout and grizzly bears which correlates with hydrothermal sources.
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The document detailed three investigations using geochemical techniques to address wildlife management issues in Yellowstone National Park. The first study analyzed scat from bison, elk, and moose, revealing high concentrations of elements like arsenic and zinc, which could be toxic and are linked to hydrothermal activity. The second study focused on mercury levels in cutthroat and lake trout, showing that mercury from sublacustrine hot springs accumulates in fish and is transferred to grizzly bears that consume them, evidenced by high mercury levels in bear hair. The third study used stable-isotope compositions to understand grizzly bear diets, highlighting the consumption of whitebark pine nuts and cutthroat trout. These studies demonstrated the potential of geochemical methods to enhance understanding of wildlife ecology and inform management strategies in the park.
