References 



Akehurst, S. C. 1931 . Observations on pond life, with special reference to the possible causation of 

 swarming of phytoplankton . J. Roy. Micros. Soc . 51:231-265. 



Allen, M. B. 1955 . General features of algal growth in sewage oxidation ponds. Calif. State 

 Water Pollution Control Board Publication. No. 13. 



Allen, M. B. 1956. Excretion of organic compounds by Chlamydomonas . Arch. Mikrobiol . 24:163-168. 



Bentley, Joyce A. 1958. Role of plant hormones in algal metabolism and ecology. Nature 181:1499-1502. 



De, P. K. 1939 . The role of blue-green algae in nitrogen fixation in rice fields. Proc . Roy. Ser. B 

 127:121-139. 



Denffer, D. von. 1948. Uber einen Wachstumshemmstof in ulternden Diatomeenkulturen . Biol. Zbl . 

 67:7-13. 



Flint, Lewis H. and Charles F. Moreland . 1946. Antibiosis in the blue-green algae. Amer . J. Bot. 

 33:218 (an abstract) . 



Fogg, G. E. 1942. Studies on nitrogen fixation by blue-green algae. I. Nitrogen fixation by 

 Anabaena cylindrica Lemm. J. Exp. Biol. 19:78-87. 



Fogg, G. E. 1952. The production of extracellular nitrogenous substances by blue-green algae. 

 Proc. Roy. Soc. B. 139:372-397. 



Fogg, G. E. 1953. The Metabolism of Algae . London: Methuen & Co . , Ltd. 



Fogg, G. E. 1956. The comparative physiology and biochemistry of the blue-green algae. Bact. 

 Reviews. 20:148-165 . 



Fogg, G. E. and G. T. Boalch . 1958. Extracellular products in pure cultures of a brown algae. 

 Nature. 181:789-790. 



Fogg, G. E. and D. F. Westlake. 1955 . The importance of extracellular products of algae in fresh- 

 water. Verh. Int. Ver . Limnol. 12:219-232. 



Harder, R. 1917. Ernahrungsphysiologishe Untersuchungen an Cyanophyceen , hanptsachlich dem 

 indophytischen Nostoc punctiforme . Z. Bot. 9:145- 



Hartman, Richard T. and Charles F. Demoise. Effects of extracts from algal bloom communities on the 

 growth of algae in culture. Unpublished. 



Henrikson, Elisabet. 1951. Nitrogen fixation by a bacterial free, symbiotic Nostoc strain isolated 

 from Coll ema . Physiol. Plantarum 4:542-545 . 



Hutchinson, G. E. 1941. Ecological aspects of succession in natural populations. Amer. Nat. 

 75:406-418. 



Hutchinson, G. E. 1944. Limnological studies in Connecticut . VII. A critical examination of the 

 supposed relationship between phytoplankton periodicity and chemical changes in lake waters. 

 Ecology. 25:3-26. 



Jakob, H. 1954. Compatibilities et antagonismes entre algues du sol. C. R. Acad. Sci . 238:928. 



Johnston, R. 1955. Biologically active compounds in the sea. J. Mar. Biol. Assn. U. K. 34:185-195. 



53 



