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Article

The geographic selection mosaic for ponderosa pine and crossbills: a tale of two squirrels.

Evolution; international journal of organic evolution - 1 Feb 2008

Parchman Thomas L, Benkman Craig W

Abstract excerpt

Recent research demonstrates how the occurrence of a preemptive competitor (Tamiasciurus) gives rise to a geographic mosaic of coevolution for crossbills (Loxia) and conifers. We extend these studies by examining ponderosa pine (Pinus ponderosa), which produces more variable annual seed crops than the conifers in previous studies and often cooccurs with tree squirrels in the genus Sciurus that are less...

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Identifiers

PMID: 17999725
DOI: 10.1111/j.1558-5646.2007.00295.x

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-07.1.

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