The heterobasidiomycetous yeast genus Leucosporidium in an area of temperate climate

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Abstract
A wide range of habitats in and near southern British Columbia was sampled for the presence of Leucosporidium spp. Leucosporidium scottii, the only species capable of growth at mesic temperatures, occurred abundantly on marine substrates. The thalli of phaeophyte algae yielded particularly large numbers of isolates, but only in the colder months of the year. Leucosporidium scottii was found less frequently in terrestrial or freshwater habitats but was a major component of the yeast mycobiota of organic materials decaying in cold moist soils. The remaining five known species of Leucosporidium were not found. Genetic studies revealed that the tetrapolar mating system of L. scottii is characterized by the presence of multiple alleles at the A locus. The B locus appears to be biallelic.