The Ecological and Physiological Significance of the Growth of Heterotrophic Microorganisms with Mixtures of Substrates

摘要: It has been estimated that globally some 500 × 1012 kg of carbon dioxide are assimilated into biomass by autotrophic organisms annually. More than 99% this is remineralized, keeping the global biogeochemical cycle roughly in balance (Hedges, 1992). In both terrestrial and aquatic ecosystems majority primary not consumed directly herbivorous animals, but decays to detritus serves as a nutritional basis for growth consumers (for an extensive discussion, see Fenchel Jorgensen, 1977). There now substantial evidence suggesting large part energy nutrients contained processed via microbial food chain, mineralizing ability makes heterotrophic microorganisms important link (Fenchel 1977; Paul Voroney, 1980; Wetzel, 1984; Cole et al., 1988; Mann, 1988). addition, their mineralize man-made xenobiotic organic chemicals become increasingly important. This illustrated fact industrialized countries flux synthetically produced material, much which ending up environment, increased within past two centuries 40 g C m−2 year−1. figure equivalent approximately 15% net production these regions (Egli,