Fecal steroid influxes generally show a negative trend during the culling period ( Fig 5B & 5C ), with the notable exception of a peak in zoostanols at c . 1964 (2σ 1954–1967; Fig 5B ).
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A 2000-year record of fecal biomarkers reveals past herbivore presence and impacts in a catchment in northern Yellowstone National Park, USA.
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