Author(s)

D.T. Kincaid, R. Stalter, E.E. Lamont

Abstract

We implement methods for generating null plant communities in order to have em- pirical probability distributions (e.g., of Jaccard floristic similarity) against which observed statistics may be compared for tests of significance. We present data for three United States Atlantic coastal sites having a conbined vascular flora of 1298 species. The flora of these sites, located from about 400 to 250 N Latitude, was geographically disjunct. Only 2% of the 1298 species was found at all three sites, 19% was found at two sites, and 79% of species was found only at one of our coastal sites, despite their physiographic similarity. This pattern was similar for the 350 alien species (27%of total species) and the 35 species of non-flowering plants. Jaccard co

Keywords