Table 1. Dominant fungal species (highest number of colonies obtained per unit of volume) in snow and outdoor air samples collected in Beijing from January to March, 2010.

Different snow samples	Dominant fungal species identified using microscopic methods
1-Jan	Entomophthorales (insects pathogens), Cladosporium, Penicillium, Aspergillus, Alternaria
1-Mar	Aspergillus, Saccharomyces cerevisiae (budding yeast), Cladosporium
8-Mar	Pseudocercospora (plant pathogens), Cladosporium, Zoopagales (parasites or predators of microscopic animals), Alternaria
14-Mar	Blastocladiales, Cladosporium, Leptomitales, Alternaria
Outdoor air sample	Alternaria, Aspergillus, Penicillium, Cladosporium, Stemphylium (plant pathogen), Phyllosticta (plant pathogen)