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Oecologia (2004) 141: 7683 DOI 10.1007/s00442-004-1638-8
 

Summary: Oecologia (2004) 141: 7683
DOI 10.1007/s00442-004-1638-8
PLANT ANIMAL INTERACTIONS
Kristen M. Pearson . Tad C. Theimer
Seed-caching responses to substrate and rock cover by two
Peromyscus species: implications for pinyon pine establishment
Received: 18 December 2003 / Accepted: 27 May 2004 / Published online: 16 July 2004
# Springer-Verlag 2004
Abstract We examined whether pinyon mice (Peromys-
cus truei) and brush mice (P. boylii) could act as directed
dispersal agents of pinyon pine (Pinus edulis) through
differential responses to soil particle size and rock cover.
In field experiments, we allowed mice to either cache
pinyon seeds or recover artificially cached seeds (pilfer)
from quadrats containing large- or small-particle soils.
Both species placed most (70%) seed caches in small-
particle soil. Pilfering was the same from both particle
sizes in the first year, while more seeds were pilfered from
large-particle soils in the second year. In separate
experiments, rock cover interacted with soil particle size,

  

Source: Allan, Gery - Department of Biological Sciences, Northern Arizona University

 

Collections: Biology and Medicine; Environmental Sciences and Ecology