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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 1198

Kurihara Yasushi; Studies of the interaction in a microcosm. Sci.Rep.Tohoku Univ.Ser.IV (Biol.) 37:161-177, 1978

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Some of the properties of a microcosm characterized by the formations of colonies consisting of producers, consumers and decomposers was described. 1) A definite relationships was indicated between the sequence of each several organism and the gradient of initial concentrations of bacterial nutrients. 2) The numbers of each organism in a microcosm based on 0.01% proteose peptone culture medium were counted. 3) An attempt was made to determine the organism responsible for the formation of colonies. Colonies were not observed to form when communities without Aeolosoma were introduced into fresh media. 4) Organisms which prey on Aeolosoma and rotifers were investigated. Aeolosoma prey upon bacteria, Chlorella, Schizothrix, Mougeotia, and possibly ciliate protozoa, Cyclidium, and rotifers upon bacteria, Chlorella and Cyclidium. 5) The network of interactions in the microcosm was expressed both graphically and, in a provisional form mathematically.