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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 30 July 2021

The Relative Importance of Predation, Food, and Interspecific Competition for Growth of Prairie Vole (Microtus Ochrogaster) Populations

The Relative Importance of Predation, Food, and Interspecific Competition for Growth of Prairie Vole (Microtus Ochrogaster) Populations

La Importancia Relativa De PredaciÓN, AlimentaciÓN, Y Competencia InterespecÍFica En El Crecimieto Poblacional Del Metorito De La Pradera (Microtus Ochrogaster)

Chapter:
(p.49) The Relative Importance of Predation, Food, and Interspecific Competition for Growth of Prairie Vole (Microtus Ochrogaster) Populations
Source:
The Quintessential Naturalist
Author(s):

George O. Batzli

Steven J. Harper

Yu-teh K. Lin

Publisher:
University of California Press
DOI:10.1525/california/9780520098596.003.0003

This chapter presents a new analysis of experimental data that examines the relative effects of three factors—predation, food supply, and interspecific competition—on the population growth of voles. It aims to test the proposition that predation is an important factor which reduces population growth of small mammals during population increases as well as declines, an idea called Pearson's hypothesis. The chapter quantifies the relative impact on growth of prairie vole populations during the growing season of manipulating access by predators, food supply, and presence of a competing species (the meadow vole, M. ochrogaster). It finds that all three factors had substantial effects on population growth, but that predation had two–three times greater impact than did food supply or competition, using analysis of variance and linear modeling.

Keywords:   food supply, interspecific competition, M. ochrogaster, prairie vole, predation, population growth, analysis of variance, linear modeling

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