1. Nitrogen fixation by Nodularia spumigena Mertens (Cyanobacteriaceae). 1: Field studies and the contribution of blooms to the nitrogen budget of the Peel-Harvey Estuary, Western Australia

   • A. L. Huber

   OriginalPaper Pages: 193 - 203

2. The distribution of Heterotrissocladius oliveri Saether (Diptera: Chironomidae) in Lake Michigan

   • Michael H. Winnell
   • David S. White

   OriginalPaper Pages: 205 - 214

3. Decomposition and nutrient dynamics of litter from four species of freshwater emergent macrophytes

   • James T. Morris
   • Kate Lajtha

   OriginalPaper Pages: 215 - 223

4. The distribution and abundance of benthic cyclopoid copepods in Esthwaite Water, Cumbria

   • Stuart Tinson
   • Johanna Laybourn-Parry

   OriginalPaper Pages: 225 - 234

5. Winter phytoplankton communities of Utah Lake, Utah, USA

   • Lorin E. Squires
   • Samuel R. Rushforth

   OriginalPaper Pages: 235 - 248

6. Effect of a single residual chlorine pulse upon subsequent in vitro protein synthesis by rainbow trout (Salmo gairdneri) liver

   • David R. Orvos
   • Cletus M. Sellers Jr.
   • Norman E. Garrison

   OriginalPaper Pages: 249 - 255

7. Growth of water hyacinth (Eichhornia crassipes (Mart.) Solms) in the middle Paraná River (Argentina)

   • Ricardo E. Fitzsimons
   • Rubén H. Vallejos

   OriginalPaper Pages: 257 - 260

8. The nature of zooplankton spatial heterogeneity in a nonriverine impoundment

   • Robert S. Hayward
   • Michael J. Van Den Avyle

   OriginalPaper Pages: 261 - 271

9. Trace element composition of Pistia stratiotes L. in a polluted lake in Nigeria

   • M. K. C. Sridhar

   OriginalPaper Pages: 273 - 276

10. Effect of habitable space on substrate selection by Paragnetina media (Walker) (Plecoptera: Perlidae)

    • Blair W. Feltmate
    • Philip J. Pointing

    OriginalPaper Pages: 277 - 279

11. Nematodes as a possible cause of rhizome damage in three species of Potamogeton

    • Krystyna Prejs

    OriginalPaper Pages: 281 - 286