The impact of passage through the intestine of the earthworm Aporrectodea caliginosa on the bacterial community

Ecophysiological features of the transit (passed through the intestinal lacune) bacterial hydrolytic complex Aporrectodea caliginosa were studied: a comparison of biodiversity was made in the soil and coprolites, the prevailing ecological strategy and physiological states among its members. The study was conducted by a complex structural and functional method based on the succession kinetic analysis of initiated hydrolytic bacterial communities that occur after the inoculation of a set of selective liquid nutrient media with a suspension of the test samples. In addition to hydrolytic microorganisms, non-hydrolytic bacterial satellites (oligotrophs and copyotropes) are included in initiated communities. The growth of initiated bacterial communities on eight media with biopolymers (chitin, cellulose, pectin, starch, xylan, dextran 500, tween 20, casein) was measured by optical density. It was described by two kinetic parameters used to describe the pure cultures of microorganisms: the maximum specific growth rate and the initial physiological state...