The recovery of high numbers of bdellovibrios from the surface water microlayer

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Abstract
Bdellovibrios lytic against the bacterium Vibrio parahaemolyticus have been recovered in the surface water microlayer. The organisms were recovered at numbers several 100-fold higher than the number recovered from subsurface waters, the aquatic area where most quantitative studies for bdellovibrios have been conducted. The number of total cultivable bacteria recovered in the surface water microlayer exceeded by several logs the number of cultivable bacteria recovered from subsurface waters. The results of this study reveal that bdellovibrios can be recovered in the aquatic environment at higher numbers than some previous studies have indicated. The high numbers of bdellovibrios and other bacteria recovered from the surface water microlayer makes this an attractive ecosystem in which to study the ecology of bdellovibrios in the aquatic environment.