1. Ammonia volatilization in a Mexican bat cave ecosystem

   • Donald A. McFarlane
   • Raymond C. Keeler
   • Hiroshi Mizutani

   OriginalPaper Pages: 1 - 8

2. Nitrogen cycling in two riparian forest soils under different geomorphic conditions

   • G. Pinay
   • C. Ruffinoni
   • A. Fabre

   OriginalPaper Pages: 9 - 29

3. Interpretation of sulfur cycling in two catchments in the Black Forest (Germany) using stable sulfur and oxygen isotope data

   • Bernhard Mayer
   • Karl H. Feger
   • Hans-J. Jäger

   OriginalPaper Pages: 31 - 58

4. Dissolved organic matter quantity and quality from freshwater and saltwater lakes in east-central Alberta

   • P. J. Curtis
   • H. E. Adams

   OriginalPaper Pages: 59 - 76