The publication of Volume. 10 of Advances in Microbial Ecology repre sents something of a milestone in the history of modern microbial ecol ogy. Advances in Microbial Ecology was established by the International Committee on Microbial Ecology (ICOME) to provide a vehicle for in depth, critical, and even provocative reviews to emphasize current trends in the rapidly expanding field of microbial ecology. Martin Alexander was the Founding Editor of the series and was responsible for editing the first five volumes. The next five volumes were edited by Kevin Marshall. Advances in Microbial Ecology has attained recognition as an authorita tive source of information and inspiration for practicing and prospective microbial ecologists. The Editorial Board usually invites contributions from leading microbial ecologists, but also encourages individuals to sub mit outlines of unsolicited contributions to any member of the Board for consideration for publication in Advances. Contributions to Volume 10 again cover a broad range of topics related to microbial ecology. Interactions between microorganisms are well represented with chapters on bacterium-virulent bacteriophage interactions by R. E. Lenski, on fungal communities in the decay of wood by A. D. M. Rayner and L. Boddy, on recognition in the nematode nematophagous fungus system by B. Nordbring-Hertz, and on phago trophic phytoflagellates by R. W. Sanders and K. G. Porter. Chapters with both an ecological and a biogeochemical flavor include those on atmo spheric CO and H2 by R.