Laboratory experiments use culture and molecular-based methods for isolating, identifying, enumerating and characterizing microbes and their communities from aquatic and terrestrial environments. Bioassays for industrially and environmentally important microbial products and ecological processes will be studied. Prerequisite: MICRB 265 and consent of instructor. MICRB 320 recommended. Credit may not be obtained for both MICRB 392 and 492. Offered in alternate years.