Abstract

In cave sediments of the French Jura Mountains four Myxobacteria species could be identified: Myxococcus fulvus, Corallococcus coralloides, Archangium gephyra and Myxococcus virescens. Aquatic habitats reveal higher Myxobacteria counts and increased diversity than terrestrial habitats. A. gephyra and M. virescens were promoted by aquatic conditions. C. coralloides predominates in surface-near subterraneous sediments, whereas M. fulvus predominates in zones with increased depth. The sediment texture influenced the distribution of species. The data allow a comparison of karst systems in Europe. A high correlation was found between the average number of Myxobacteria species and the average subterranean temperature. The ecological valence and the cardinal temperatures of the species most likely control this. Myxobacteria possibly play a role in the control of subterraneous biofilm growth.

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