Titlebook: Aquatic Humic Substances; Ecology and Biogeoch Dag O. Hessen,Lars J. Tranvik Book 1998 Springer-Verlag Berlin Heidelberg 1998 Humus.Kohlens

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,Flie?barkeit und Zustandsdiagramm,The impact of such factors as flocculation and photochemical processes upon the microbial degradation will also be discussed. The further consequences which the production of bacterial biomass can have on the structure and function of the ecosystem through the consumption of DOM will be considered a

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https://doi.org/10.1007/978-3-663-04824-4ogically attractive concept of distinct trophic levels. This simplified concept of energy flow has, over the past 30 years, been thoroughly criticized and reformulated (Pimm 1982, Polis and Winemiller 1994). Firstly, almost all organisms are omnivores in the sense that they feed on more than one tro

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https://doi.org/10.1007/978-3-663-04824-4.C “age” of dissolved organic carbon (DOC) in the deep ocean is 4000–6000 years B.P. (Williams and Druffel 1987; Bauer et al. 1992), indicating that some organic matter has a long residence time in the ocean. These apparently contradictory observations indicate that residence times of the diverse mi

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Humic Substances as Ecosystem Modifiers — Introductionen humic lakes and clearwater lakes. In a two-dimensional diagram, there would thus be a continuum along the productivity axis from (ultra)oligotrophy to (hyper)eutrophy, while the humic lakes would stretch along the humus (or dissolved organic carbon) axis, yet at the very oligotrophic end. Similar

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The Role of Microbial Extracellular Enzymes in the Transformation of Dissolved Organic Matter in Humtilization by phagotrophic microbes such as flagellates (Sherr 1988; Sanders 1991; Tranvik et al. 1993), osmotrophic microorganisms such as bacteria and fungi are the major sinks for NOM, and by utilizing primarily DOM resources (Benner et al. 1986, 1989; Azam and Cho 1987; Cho and Azam 1988) they a

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Degradation of Dissolved Organic Matter in Humic Waters by BacteriaThe impact of such factors as flocculation and photochemical processes upon the microbial degradation will also be discussed. The further consequences which the production of bacterial biomass can have on the structure and function of the ecosystem through the consumption of DOM will be considered a