Environmental Regulation of the Distribution and Ecology of Bdellovibrio and Like Organisms

Frontiers in Microbiology
Henry N Williams, Huan Chen

Abstract

The impact of key environmental factors, salinity, prey, and temperature, on the survival and ecology of Bdellovibrio and like bacteria (BALOs), including the freshwater/terrestrial, non-halotolerant group and the halophilic Halobacteriovorax strains, has been assessed based on a review of data in the literature. These topics have been studied by numerous investigators for nearly six decades now, and much valuable information has been amassed and reported. The collective data shows that salinity, prey, and temperature play a major role in, not only the growth and survival of BALOs, but also the structure and composition of BALO communities and the distribution of the predators. Salinity is a major determinant in the selection of BALO habitats, distribution, prey bacteria, and systematics. Halophilic BALOs require salt for cellular functions and are found only in saltwater habitats, and prey primarily on saltwater bacteria. To the contrary, freshwater/terrestrial BALOs are non-halotolerant and inhibited by salt concentrations greater than 0.5%, and are restricted to freshwater, soils, and other low salt environments. They prey preferentially on bacteria in the same habitats. The halophilic BALOs are further separated on the basi...Continue Reading

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Methods Mentioned

BETA
light microscopy

Related Concepts

Balo's Concentric Sclerosis
Bdellovibrio
Disease Susceptibility
DNA, Ribosomal
Drug Resistance
Environment
Laboratory
Laboratory Procedures
Literature
Research Personnel

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