Abstract
Fire, microhabitat, and their interactions affect Florida scrub ecosystems and their plant species. Concepts of vegetation change in the Florida upland landscape have followed successional theory, with recent models emphasizing the resilience of Florida scrub to fire and the interactive effects of the vegetation and fire regime. We extend these models by incorporating greater complexity in vegetation types and emphasizing that departures from modal fire frequencies may alter vegetation. In particular, fire exclusion leads to structural and compositional changes that, in turn, alter vegetation changes following the reintroduction of fire. Individual species responses to fire can be categorized by the demographic mechanisms of the response (e.g., resprouting, clonal growth, seedling recruitment) and by typical patterns of abundance during fire-free intervals. Various types of scrub differ in these life-history traits. For example, xeric rosemary scrub supports more herbs, more endemics, more specialized spe...
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