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By John R. Lawrence, D. R. Korber, G. M. Wolfaardt (auth.), J. Gwynfryn Jones (eds.)

ISBN-10: 1468477242

ISBN-13: 9781468477245

ISBN-10: 1468477269

ISBN-13: 9781468477269

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Similar findings were made by Vargas and Hattori (1990). Protozoan predation has also been shown to have a significant effect on biofilm development in marine systems (Pederson, 1982). In addition, the grazing effects of protozoa can be species-specific and mediated by external recognition factors such as exopolymer chemistry. Snyder (1990) has shown the importance of extracellular components in prey recognition by the ciliate Pseudocolloembus marinus. Lawrence et ai. (1993) indicated that the presence of protistan grazers markedly altered the EP chemistry and architecture of a biofilm community.

2 hr for the daughter). It is significant that pedomicrobial nets, involving extensively intertwined hyphae and extracellular polysaccharides, may also form following extended surface colonization, a behavior clearly indicating a disposition for colonial growth under appropriate conditions (Hirsch, 1968; 1. R. Lawrence, D. R. Korber, and D. E. Caldwell, unpublished data). Solitary bacteria have also been demonstrated to exhibit various degrees of movement over surfaces. Rolling surface behavior, a simple although poorly understood growth habit, has been documented for members of stream communities by Lawrence and Caldwell (1987).

1992; Lawrence and Korber, 1993), with events paralleling that of P. fluorescens. Vibrio parahaemolyticus grown on SIDE VIEW Recolonizing cells ~ FLOW Recolonizing cell TOP VIEW -- ~ ..... S-" F TIME Figure 4. Schematic diagram illustrating the series of cell movements that occur during the formation of a packing colony, with a subsequent dispersal and reattachment/recolonization phase. Figure S. Phase-contrast photomicrographs showing packing colony formation during the development of P. 17 to 6 hr).

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Advances in Microbial Ecology by John R. Lawrence, D. R. Korber, G. M. Wolfaardt (auth.), J. Gwynfryn Jones (eds.)

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