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A test of Sporormiella representation as a predictor of megaherbivore presence and abundance

Published online by Cambridge University Press:  20 January 2017

Diana Raper*
Affiliation:
Department of Biological Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA College of Forestry, Oregon State University, Corvallis, OR 97331, USA
Mark Bush
Affiliation:
Department of Biological Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA
*
*Corresponding author. College of Forestry, Oregon State University, Corvallis, OR 97331, USA. Email Address:diana.raper@oregonstate.edu

Abstract

Spores of the dung fungus Sporormiella have been suggested to indicate the presence, perhaps also the abundance of past megaherbivore populations. Nonetheless, basic studies demonstrating a correlation between Sporormiella concentration in lacustrine sediments and modern herbivore abundance are lacking. This study of Sporormiella representation in grazed and ungrazed landscapes provides supporting evidence for the application of Sporormiella as an indicator of megaherbivore presence and abundance in ancient landscapes. However, Sporormiella representation is spatially sensitive to the distance from the dung source. In lakes where Sporomiella are abundant in shoreline sediments, they decline sharply with increasing distance from the lake edge. Although this study provides supporting evidence for the application of Sporormiella as a proxy for herbivore presence and abundance, independent proxies should be applied in conjunction with Sporormiella to control for changes in lake size.

Type
Articles
Copyright
University of Washington

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