Organic inputs and soil metabolism protozoa - recyclers and indicators of agroecosystem quality nematodes - harmful and beneficial organisms enchytraeids earthworms (lumbricidae - oligochaeta) - important promoters of soil development and soil fertility springtails and mites - important knots in the food web of soils gastropods, isopods, diplopods and chilopods - neglected groups of the decomposer food web spiders, carabids and staphylinids - the ecological potential of predatory macroarthropods soil-food web interactions and their modelling.