1. Abundance and functions of natural organic matter species in soil and water

   • Lars J. Tranvik
   • Patrick A. W. van Hees
   • Ulla S. Lundström

   Preface Pages: 149 - 150

2. Structural characterization of aquatic humic substances – The need for a multiple method approach

   • Gudrun Abbt-Braun
   • Ulrich Lankes
   • Fritz H. Frimmel

   Overview Article Pages: 151 - 170

3. Essential characteristics of natural dissolved organic matter affecting the sorption of hydrophobic organic contaminants

   • Jarkko Akkanen
   • Rolf D. Vogt
   • Jussi V. K. Kukkonen

   Research Article Pages: 171 - 177

4. Properties of humic acids as biomarkers of lake catchment management

   • Joanna Cieslewicz
   • Slawomir S. Gonet

   Research Article Pages: 178 - 184

5. Characterization of sediment pore-water dissolved organic matter of lakes by high-performance size exclusion chromatography

   • Viia Lepane
   • Aina Leeben
   • Olga Malashenko

   Research Article Pages: 185 - 194

6. Key site variables governing the functional characteristics of Dissolved Natural Organic Matter (DNOM) in Nordic forested catchments

   • Rolf D. Vogt
   • Jarkko Akkanen
   • Ádám Zsolnay

   Research Article Pages: 195 - 210

7. Seasonal and photochemical changes of DOM in an acidified forest lake and its tributaries

   • Petr Porcal
   • Josef Hejzlar
   • Jiří Kopáček

   Research Article Pages: 211 - 222

8. Seasonal TOC export from seven boreal catchments in northern Sweden

   • Hjalmar Laudon
   • Stephan Köhler
   • Ishi Buffam

   Research Article Pages: 223 - 230

9. Increased colour and organic acid concentrations in Norwegian forest lakes and drinking water – a result of increased precipitation?

   • Dag Hongve
   • Gunnhild Riise
   • Jan F. Kristiansen

   Research Article Pages: 231 - 238

10. Humic substances affect physiological condition and sex ratio of swordtail (Xiphophorus helleri Heckel)

    • Thomas Meinelt
    • Kurt Schreckenbach
    • Christian E. W. Steinberg

    Research Article Pages: 239 - 245