Cellular Slime Molds of the Southern Appalachians

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Abstract
The occurrence and distribution of cellular slime molds were studied in relation to altitude of southern Appalachian forest sites. Nineteen sites were sampled in 7 forest types at elevations between 230 and 1800 m. The diversity of cellular slime molds was greater than in other geographical areas of temperate North America. Twelve described dictyostelid slime molds and 1 acrasid slime mold were isolated in addition to a new species of the genus Polysphondylium [not described here] and a naturally occurring mutant of uncertain affinity. One species, Acytostelium subglobosum, was isolated for the 1st time in North America. Optimum forest habitats in terms of acrasian diversity were between 590 and 820 m. Segregation of species by altitude was similar to that by latitude, again indicating a strong climatic influence on distribution. [Genera in the study were: Dictyostelium, Polysphondylium, Acytostelium and Copromyxella.].

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