Callaway and Davis were able "to quantify dynamic chaparral in vegetation patterns and the relative importance of fire, livestock grazing, topography, and substrate in grassland, coastal sage scrub, chaparral, and oak woodland distribution in central coastal California.”
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Callaway, R.M., and F.W. Davis. 1993. Vegetation dynamics, fire, and the physical environment in coastal central California. Ecology74:1567-1578.