Dissolved Organic Matter in Lacustrine Ecosystems

1. Front Matter

   Pages i-vii

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2. Origin and nature of DOM in lakes

   1. Natural and man-caused factors affecting the abundance and cycling of dissolved organic substances in precambrian shield lakes

      • D. W. Schindler, S. E. Bayley, P. J. Curtis, B. R. Parker, M. P. Stainton, C. A. Kelly

      Pages 1-21

   2. Sources, concentrations and characteristics of organic matter in softwater lakes and streams of the Swedish forest region

      • Markus Meili

      Pages 23-41

   3. Leaching from vegetation of soluble polyphenolic compounds, and their abundance in temporary ponds in the Doñana National Park (SW Spain)

      • Laura Serrano

      Pages 43-50

   4. Will an increased greenhouse impact in Fennoscandia give rise to more humic and coloured lakes?

      • Curt Forsberg

      Pages 51-58

   5. Impacts of environmental changes on the biogeochemistry of aquatic humic substances

      • H. De Haan

      Pages 59-71

3. DOM as an energy source

   1. The influence of humic substances on lacustrine planktonic food chains

      • Roger I. Jones

      Pages 73-91

   2. Extracellular dissolved organic carbon released from phytoplankton as a source of carbon for heterotrophic bacteria in lakes of different humic content

      • Ingvar Sundh, Russell T. Bell

      Pages 93-106

   3. Allochthonous dissolved organic matter as an energy source for pelagic bacteria and the concept of the microbial loop

      • Lars J. Tranvik

      Pages 107-114

   4. Dissolved organic carbon in a humic lake: effects on bacterial production and respiration

      • Dag O. Hessen

      Pages 115-123

   5. Planktonic food chains of a highly humic lake

      • K. Salonen, L. Arvola, T. Tulonen, T. Hammar, T.-R. Metsälä, P. Kankaala et al.

      Pages 125-142

   6. Planktonic food chains of a highly humic lake

      • K. Salonen, P. Kankaala, T. Tulonen, T. Hammar, M. James, T.-R. Metsälä et al.

      Pages 143-157

   7. Bacterioplankton in a small polyhumic lake with an anoxic hypolimnion

      • Pirjo Kuuppo-Leinikki, Kalevi Salonen

      Pages 159-168

   8. Microbial control of dissolved organic carbon in lakes: research for the future

      • John E. Hobbie

      Pages 169-180

4. DOM as a system regulator

   1. Gradient-dominated ecosystems: sources and regulatory functions of dissolved organic matter in freshwater ecosystems

      • Robert G. Wetzel

      Pages 181-198

   2. Littoral-pelagial interchange and the decomposition of dissolved organic matter in a polyhumic lake

      • Timo Kairesalo, Anja Lehtovaara, Pentti Saukkonen

      Pages 199-224

   3. Extracellular enzymes in a polyhumic lake: important regulators in detritus processing

      • U. Münster, P. Einiö, J. Nurminen, J. Overbeck

      Pages 225-238

   4. Effects of different molecular weight fractions of dissolved organic matter on the growth of bacteria, algae and protozoa from a highly humic lake

      • T. Tulonen, K. Salonen, L. Arvola

      Pages 239-252

   5. Vertical distributions of bacteria and algae in a steeply stratified humic lake under high grazing pressure from Daphnia longispina

      • L. Arvola, K. Salonen, P. Kankaala, A. Lehtovaara

      Pages 253-269

   6. Migrations of haemoglobin-rich Daphnia longispina in a small, steeply stratified, humic lake with an anoxic hypolimnion

      • Kalevi Salonen, Anja Lehtovaara

      Pages 271-288

Concentrations of dissolved organic matter (DOM) in lakes are often an order of magnitude greater than concentrations of particulate organic matter; nevertheless, the biogeochemical analysis of DOM is described in only a few textbooks on limnology (most thoroughly by Wetzel). The orgins of dissolved organic substances are largely photosynthetic; DOM is either autochthonously synthesized by littoral and pelagic flora through secretions and autolysis of cellular contents, or allochthonously generated in terrestrial systems of the drainage basin, composing largely of humic substances refractory to rapid microbial degradation. The role of DOM in lacustrine ecosystems, as energy source and system regulator, however, is still poorly known.
The aim of this book is: (1) to present state-of-the-art reviews of the role of dissolved autochthonous and allochthonous organic matter in pelagial and littoral zones; and (2) to focus attention on poorly understood but critical topics and hence to provide direction for future research activity.

• Vegetation
• algae
• ecosystem
• environment
• geochemistry
• mesocosm
• phytoplankton
• plankton

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