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High molecular weight algal substances in the sea

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Abstract

Phytoplankton exudates into culture media and extracts from littoral algae are shown to contain significant quantities of extracellular materials having molecular weights in excess of 50,000. A recent development in experimental fluid mechanics (the reduction of turbulent friction coefficients of flowing solutions by dissolved macromolecules) has been utilized as a specific test for high molecular weight compounds. Phytoplankton species in all major algal groups could be found which exude high molecular weight compounds into their culture media; the red alga Porphyridium cruentum typically produced friction reductions as high as 60%. Seaweed samples in the Chlorophyta, Phaeophyta, and Rhodophyta showed major changes in turbulent friction coefficient; in some cases the friction was less than 1/2 that of pure seawater. All samples of the genus Porphyra and Gigartina produced substantial friction changes. From these experiments it is concluded that algal exudates can be a prominent source of high molecular weight compounds in the sea.

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Literature cited

  • Buist, G.: Notes on certain discolored appearances met with on the surface of the sea in warm latitudes. Naut. Mag. 23 (1854). [Exerpt in Library of Congress, QL123B8].

  • Harvey, G. W.: Microlayer collection from the sea surface: a new method and initial results. Limnol. Oceanogr. 11, 608–613 (1966).

    Google Scholar 

  • Hidaka, T. and R. Baudoin: Les Fucus et la formation de l'ecume marine. C. r. hebd. Séanc. Acad. Sci., Paris 260, 5861–5864 (1965).

    Google Scholar 

  • Hoyt, J. W.: A turbulent-flow rheometer. In: Symposium on rheology, pp 71–82. Ed. by A. W. Morris and J. T. S. Wang, New York: ASME 1965.

    Google Scholar 

  • — Friction reduction as an estimator of molecular weight. Polym. Lett. 4, 713–716 (1966).

    Google Scholar 

  • fnHoyt, J. W.: Turbulent-flow properties of polysaccharide solutions. In: Solution properties of natural polymers, pp 207–215. London: Chemical Society Spec. Publ. No. 23, 1968.

  • — and A. G. Fabula: The effect of additives on fluid friction. In: Fifth Symposium on Naval Hydrodynamics, pp 947–974. Ed. by J. K. Lunde and S. W. Doroff. Washington: Office of Naval Research (ACR-112) 1964.

    Google Scholar 

  • — and G. Soli: Algal cultures: ability to reduce turbulent friction in flow. Science, N. Y. 149, 1509–1511 (1965).

    Google Scholar 

  • Jones, R. F.: Extracellular mucilage of the red alga Porphyridium cruentum. J. cell. comp. Physiol. 60, 61–64 (1962).

    Google Scholar 

  • Kenis, P. R.: Drag reduction by bacterial metabolites. Nature, Lond. 217, 940–952 (1968).

    Google Scholar 

  • Percival, E. and R. H. McDowell: Chemistry and enzymology of marine algal polysaccharides, 219 pp. New York: Academic Press 1967.

    Google Scholar 

  • Sieburth, J. McN.: Studies on algal substances in the sea. III. The production of extracellular organic matter by littoral marine algae. J. exp. mar. Biol. Ecol. 3, 290–309 (1969).

    Google Scholar 

  • — and A. Jensen: Studies on algal substances in the sea. I. Gelbstoff (humic material) in terrestrial and marine waters. J. exp. mar. Biol. Ecol. 2, 174–189 (1968).

    Google Scholar 

  • —: Studies on algal substances in the sea. II. The formation of Gelbstoff (humic material) by exudates of Phaeophyta, J. exp. mar. Biol. Ecol. 3, 275–289 (1969).

    Google Scholar 

  • Soli, G.: Axenic cultivation of a pelagic diatom. In: Symposium on marine microbiology, pp 122–126. Ed. by C. H. Oppenheimer. Springfield, Illinois: C. C. Thomas 1963.

    Google Scholar 

  • —: A system for isolating phytoplankton organisms in unialgal and bacteria-free culture. Limnol. Oceanogr. 9, 265–268 (1964).

    Google Scholar 

  • Starr, R. C.: The culture collection of algae at Indiana University. Am. J. Bot. 51, 1013–1044 (1964).

    Google Scholar 

  • Sturdy, G. and W. H. Fischer: Surface tension of slick patches near kelp beds. Nature, Lond. 211, 951–952 (1966).

    Google Scholar 

  • Sweeney, B. M. and J. W. Hastings: Characteristics of the diurnal rhythm of luminescence in Gonyaulax polyedra. J. cell. comp. Physiol. 49, 115–128 (1957).

    Google Scholar 

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Communicated by G. L. Voss, Miami

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Hoyt, J.W. High molecular weight algal substances in the sea. Marine Biology 7, 93–99 (1970). https://doi.org/10.1007/BF00354912

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