Artificial induction of lake balls

@article{Nakazawa2004ArtificialIO,
  title={Artificial induction of lake balls},
  author={Singo Nakazawa},
  journal={The Science of Nature},
  year={2004},
  volume={60},
  pages={481}
}
  • S. Nakazawa
  • Published 1 October 1973
  • Biology
  • The Science of Nature
1. Bode, O.: Angew. Bot . 36, g6 (t962) 2. Day , 26. F., Zait l in, M.: P h y t o p a t h . Z. 34, 83 (t959) 3. Peters , D.: Virology 31, 46 (1967) 4. Koj ima , 3s et al.: ibid. 39, 162 (t969) 5. ArM, K., et al.: Ann. P h y t o p a t h . Soc. J a p a n 35, t0 (1969) 6. Peters , D., Van Loon, L. C.: Virology 35, 597 (t968) 7. Sarkar, S.: Z. Na tu r fo r sch . (im Druck) 8. Bur ton , K. : Biochem. J. 62, 3t5 (1956) 9. B r a n d e n b u r g , E. : P h y t o p a t h . Z. 43, 420 (t961) 10… 

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References

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A Study of Aegagropila of Japan, with Special Reference to the Ball Formation

TLDR
The filamentous fronds of the algae of the genus Aegagropila often form spherical tballi or hollow balls mostly due to rolling about on the bottom when they are at the mercy of waves and currents, and sometimes compound balls of two or three concentric balls of different origins are found.