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Abstract

A study was conducted on the distribution and lignocellulolytic activity of the microbial community on a Douglas fir log (Pseudotsuga menziesii) in a Pacific Northwest stream. Scanning electron microscopy, plate counts, and [14C]lignocellulose degra-dation experiments show that microbial colonization and lignocel-lulolytic is mainly a surface phenomenon. Incubations of [14C]-lignocelluloses and wood samples in a nitrogenless mineral salts medium showed no increase in 14CO2 evolution as compared to incu-bations in distilled water. (N