Carbon acquisition strategies for marine macroalgae (original) (raw)

Abstract

A model system was developed to analyse differences in carbon acquisition strategies among macroalgae. During photosynthesis in a limited volume of seawater the capability of the algae to assimilate inorganic carbon as well as to change the alkalinity of the seawater was analysed. These properties were then related to the status of the carbonate equilibrium system of the seawater. The experimental system was assumed to simulate the conditions in the boundary layer during periods of low water exchange or high intensity irradiations. Fundamental differences were found between different algal classes, suggesting that capabilities to adapt to specific environmental conditions may be connected with dissimilarities in carbon acquisition strategies. In general, green algae were able to reach the highest pH (10.8 at 5°C), and thus to achieve the highest reduction in the level of inorganic carbon via a simple HCO3 −/OH− ion exchange process. For brown algae, pH increases due to carbon uptake never exceeded pH 9.7 (9.5 in a saltwater scale). In spite of this, members of the Fucaceae (littoral brown algae) were able to extract almost all of the dissolved inorganic carbon (DIC). This was achieved through a gradual decrease in the alkalinity of the enclosed water, so that the carbon assimilation could continue without any concomitant increase in pH. For red algae, the specific response was an increase in the level of inorganic carbon. Thus, for this algal class, no specific strategy for handling a shortage of inorganic carbon was documented. Within each algal class, differences in pH and DIC compensation points could be related to differences in the depths at which the algal species occurred. This paper also introduces a low cost and convenient method of analysing DIC in seawater.

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Literature cited

• Conover, J. T. (1968). The importance of natural diffusion gradients and transport of substances related to benthic marine plant metabolism. Bot. mar. 11: 1–9
  Google Scholar
• Eriksson, G. (1979). An algorithm for the computation of aqueous multicomponent, multiphase equilibria. Anal. chim. Acta 112: 375–383
  Google Scholar
• Hansson, I. (1973a). A new set of acidity constants for carbonic acid and boric acid in seawater. Deep-Sea Res. 20: 461–478
  Google Scholar
• Hansson, I. (1973b). A new set of pH-scales and standard buffers for seawater. Deep-Sea Res. 20: 479–491
  Google Scholar
• Hofslagare, O., Samuelsson, G., Sjöberg, S., Ingri, N. (1983). A precise potentiometric method for determination of algal activity in an open CO2 system. Plant Cell Envir. 6: 195–201
  Google Scholar
• Jolliffe, E. A., Tregunna, E. B. (1970). Studies on HCO3 − ion uptake during photosynthesis in benthic marine algae. Phycologia 9: 293–303
  Google Scholar
• Kerby, N. W., Raven, J. A. (1985). Transport and fixation of inorganic carbon by marine algae. Adv. bot. Res. 11: 71–123
  Google Scholar
• McClintock, M., Higinbotham, N., uribe, E. G., Cleland, R. E. (1982). Active, irreversible accumulation of extreme levels of H2SO4 in the brown alga, Desmarestia. Plant Physiol. 70: 771–774
  Google Scholar
• Moeller, H. W., Hunt, J. P. (1980). Process and apparatus for commercial farming of marine and freshwater hydrophytes, 10 pp. U.S. Patent No. 4209943, July 1
• Raven, J. A., Osborne, B. A., Johnston, A. M. (1985). Uptake of CO2 by aquatic vegetation. Plant Cell Envir. 8: 417–425
  Google Scholar
• Rueness, J. (1977). Norsk Algeflora, 266 pp. Universitetsforlaget, Oslo
  Google Scholar
• Ryberg, H., Axelsson, L. (1985). Specialized organelle arrangement related to a light buffering system in the brown algal family Fucaceae. Physiol. Pl. 64: 25 A
  Google Scholar
• Sand-Jensen, K., Gordon, D. M. (1984). Differential ability of marine and freshwater macrophytes to utilize HCO3 − and CO2. Mar. Biol. 80: 247–253
  Google Scholar
• Simkiss, K. (1964). Phosphates as crystal poisons of calcification. Biol. Rev. 39: 487–505
  Google Scholar
• Thomas, E. A., Tregunna, E. B. (1968). Bicarbonate ion assimilation in photosynthesis by Sargassum muticum. Can. J. Bot. 46: 411–415
  Google Scholar
• Ursing, B. (1968). Svenska växter i text och bild. Kryptogamer, 530 pp. P. A. Norstedt & söner, Stockholm
  Google Scholar

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Authors and Affiliations

1. Kristineberg Marine Biological Station, S-450 34, Fiskebäckskil, Sweden
   L. Axelsson & J. Uusitalo
2. Department of Marine Botany, University of Göteborg, Carl Skottsbergs Gata 22, S-413 19, Göteborg, Sweden
   J. Uusitalo

Authors

1. L. Axelsson
2. J. Uusitalo

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Communicated by T. Fenchel, Copenhagen

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Axelsson, L., Uusitalo, J. Carbon acquisition strategies for marine macroalgae.Mar. Biol. 97, 295–300 (1988). https://doi.org/10.1007/BF00391315

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• Accepted: 05 October 1987
• Issue date: February 1988
• DOI: https://doi.org/10.1007/BF00391315

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