By Professor Walter Traunspurger, Nabil Majdi, Janina Schenk, Mike Hodda, Christoph Ptatscheck, Birgit Gansfort, Tom Moens, Hendrik Fueser, Sebastian Höss. Edited by Walter Traunspurger. An array of functional roles has been attributed to them: they are grazers on bacteria and primary producers, regulators of decomposition of plant material, predators, prey for other animals, and closely associated symbionts of bacteria and other organisms.
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