1. Nitrogen economy of endolithic microbial communities in hot and cold deserts

   • E. Imre Friedmann
   • Andrew P. Kibler

   OriginalPaper Pages: 95 - 108

2. Effects of desiccation and rehydration on nitrogen fixation by epiphylls in a tropical rainforest

   • Barbara L. Bentley
   • Edward J. Carpenter

   OriginalPaper Pages: 109 - 113

3. Effects of water fluctuations on microbial mass and activity in soil

   • Vera Lund
   • Jostein Goksøyr

   OriginalPaper Pages: 115 - 123

4. Characterization, distribution, and significance ofMetallogenium in Lake Washington

   • Eileen Gregory
   • R. S. Perry
   • J. T. Staley

   OriginalPaper Pages: 125 - 140

5. DNA base compositions of halophilic and nonhalophilicBacillus firmus strains of marine origin

   • Hans -Jürgen Rüger
   • Jeanne A. C. Koploy

   OriginalPaper Pages: 141 - 146

6. Chemotactic responses ofThiobacillus thioparus

   • Roy D. Sjoblad
   • Barbara A. Coleman

   OriginalPaper Pages: 147 - 151

7. Effect of food level on reproduction and metamorphosis in the suctorian protozoanTokophrya lemnarum stein

   • Elaine B. Kent

   OriginalPaper Pages: 153 - 159

8. Physiological ecology of acetylene reduction (nitrogen fixation) in a Delaware salt marsh

   • Howard J. Dicker
   • David W. Smith

   OriginalPaper Pages: 161 - 171

9. Toxicity of carbide waste to heterotrophic microorganisms in caves

   • Kathleen Hoey Lavoie

   OriginalPaper Pages: 173 - 179

10. A method of the selective isolation and enumeration of marine Vibrionaceae

    • Usio Simidu
    • Kumiko Tsukamoto

    OriginalPaper Pages: 181 - 184

11. Book review

    • Hugh W. Ducklow
    • Ilan Chet

    BookReview Pages: 185 - 187