1. The Ethiopian Rift Valley lakes: chemical characteristics of a salinity-alkalinity series

   • Elizabeth Kebede
   • Zinabu G. Mariam
   • Ingemar Ahlgren

   OriginalPaper Pages: 1 - 12

2. Species composition and phytoplankton biomass in a tropical African lake (Lake Awassa, Ethiopia)

   • Elizabeth Kebede
   • Amha Belay

   OriginalPaper Pages: 13 - 32

3. A simple freeze dehydration method for studying epiphytic and epizoic communities using the scanning electron microscope

   • C. J. Veltkamp
   • J. C. Chubb
   • J. W. Eaton

   OriginalPaper Pages: 33 - 38

4. Long-term emergence patterns of black flies (Diptera: Simuliidae) in northwestern Pennsylvania

   • John W. McCreadie
   • Peter H. Adler
   • Edwin C. Masteller

   OriginalPaper Pages: 39 - 46

5. Relative effects of Daphnia and Ceriodaphnia on phosphorus-chlorophyll relationships in small urban lakes

   • Thomas D. Shahady
   • Garth W. Redfield

   OriginalPaper Pages: 47 - 55

6. Algae enhancing musty odor production by actinomycetes in Lake Kasumigaura

   • N. Sugiura
   • Y. Inamori
   • G. Takahashi

   OriginalPaper Pages: 57 - 64