Yellowstone National Park Report
The problem posed concerns the relative importance of climate, fire, hillslope erosion induced by overgrazing, and nutrient enrichment as recorded in selected lakes in the Northern Range of Yellowstone National Park especially during the last 150 years, When populations of elk are known to have fluctuated greatly, and when slight climatic changes are suggested from other lines of research.
Wright, Jr., H. E.
"The Relationship of Climate to Sedimentation Rates in Lakes and Ponds in Yellowstome National Park,"
University of Wyoming National Park Service Research Center Annual Report: Vol. 11
, Article 32.
Available at: http://repository.uwyo.edu/uwnpsrc_reports/vol11/iss1/32