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About this book
This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effects on light and nutrient regimes and biogeochemical cycling, to their role regarding organisms, productivity and food web organisation from bacteria to fish. Special emphasis is paid to carbon cycling and food web organisation in humic lakes, but aspects of marine carbon cycling related to humus are treated as well.
Contents
Introduction.- Sources and Age of Aquatic Humus.- Chemical Composition, Structure, and Metal Binding Properties.- Humus and Acidification.- Humus and Climate.- Attenuation of Solar Radiation in Humic Waters.- Effects of UV Radiation.- Phytoplankton, Primary Production and Nutrient Cycling.- Nutrient Limitation and Bacteria-Phytoplankton Interactions.- The Role of Microbial Extracellular Enzymes in the Transformation of Dissolved Organic Matter.- Degradation of Dissolved Organic Matter by Bacteria.- Food Webs and Carbon Cycling.- Cycling of Dissolved Organic Matter in the Ocean.- Conclusions.
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