Abstract
Differential profiles are used to describe a pattern of vegetation change across the boundary between annual grassland and coastal sage scrub in southern California. Several techniques for deriving differential profiles are compared; profiles derived from multivariate ordination are found to be most informative. Quantitative description of the vegetation boundaries by differential profiles permitted their classification into two categories of abrupt boundaries and three categories of gradual transitions. Differences between these boundary types appear to be the result of differences in soil texture and compaction, degree of disturbance, and spatial distribution of disturbance.
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