abd (version 0.2-7)

LodgepolePines: Lodgepole Pine Cone Masses

Description

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

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

LodgepolePines
str(LodgepolePines)
xyplot(conemass ~ habitat, LodgepolePines)