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abd (version 0.2-8)

LodgepolePines: Lodgepole Pine Cone Masses

Description

Masses of cones of lodgepole pines (conemass) from 16 different habitat types (habitat) in western North America.

Arguments

Format

A data frame with 16 observations on the following 4 variables.
habitat
a factor with levels: island absent, island present, and mainland present
conemass
mass of cone
location
island or mainland
squirrels
absent or present

Source

Edelaar, P. and C.W. Benkman. 2006. Replicated population divergence caused by localised coevolution? A test of three hypotheses in the Red Crossbill-lodgepole pine system. Journal of Evolutionary Biology 19: 1651-1659.

References

http://en.wikipedia.org/wiki/Lodgepole_pine

http://en.wikipedia.org/wiki/Red_crossbill

Examples

Run this code
LodgepolePines
str(LodgepolePines)
xyplot(conemass ~ habitat, LodgepolePines)

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