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Interactions Among Gypsy Moths, White-footed Mice, and Acorns

Joseph S. Elkinton, William M. Healy, John P. Buonaccorsi, George H. Boettner, Anne M. Hazzard and Harvey R. Smith
Ecology
Vol. 77, No. 8 (Dec., 1996), pp. 2332-2342
Published by: Wiley
DOI: 10.2307/2265735
Stable URL: http://www.jstor.org/stable/2265735
Page Count: 11
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Interactions Among Gypsy Moths, White-footed Mice, and Acorns
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Abstract

Low-density populations of gypsy moth, Lymantria dispar, were studied over a 10-yr period in Massachusetts. Increases in gypsy moth density were associated with declines in density of the white-footed mouse, Peromyscus leucopus, a principal predator. Furthermore, changes in density of P. leucopus populations were positively correlated with the density of acorn crops, a dominant winter food source for these mice. To demonstrate these effects we used a novel bootstrap regression method that adjusts for spatial and temporal autocorrelation in the time series data. The findings are compatible with a dual equilibrium model of gypsy moth population dynamics, in which low densities are regulated by mice and high densities are regulated by other factors, notably a virus disease.

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