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Marine Biology

, Volume 97, Issue 4, pp 575–580 | Cite as

Temperature ecotypes near the southern boundary of the kelp Laminaria saccharina

  • V. A. Gerard
  • K. R. Du Bois
Article

Abstract

Effects of temperature on survival, growth, and photosynthesis were compared for two USA populations of Laminaria saccharina Lamour. One population was located in New York State, near the southern latitudinal boundary of the species in the western North Atlantic. This southern boundary population was exposed to ambient temperatures ≧20°C for about 6 wk each summer. The second population was located in Maine, toward the center of the latitudinal range of the species, and was rarely exposed to temperatures>17°C. sporophytes from the New York (NY) population exhibited greater tolerance of high temperature than plants from the Maine (ME) site. Juvenile sporophytes from the two sites had similar rates of survivorship and growth at temperatures below 20°C, but showed different responses at 20°C in laboratory experiments. NY plants survived and grew for 6 wk at 20°C. ME plants showed negative growth during wk 2 and 100% mortality during wk 3. NY and ME plants held in situ at the NY site during June to September, 1985, also exhibited differential survivorship when ambient temperatures exceeded 20°C. Results of photosynthesis and dark respiration measurements on NY and ME plants grown at various temperatures suggested that the high-temperature tolerance of NY plants was attributable to their ability to maintain positive daily net C-fixation at 20°C. The high-temperature tolerance of the NY plants appeared to be due to genetic adaptation and is probably crucial to the persistence of the species near its southern boundary.

Keywords

Photosynthesis Saccharina Dark Respiration Southern Boundary Differential Survivorship 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. Bolton, J. J. (1983). Ecolinal variation in Ectocarpus siliculosus (Phaeophyceae) with respect to temperature growth optima and survival limits. Mar. Biol. 73: 131–138Google Scholar
  2. Bolton, J. J., Germann, I., Lüning, K. (1983). Hybridization between Atlantic and Pacific representatives of the Simplices section of Laminaria (Phaeophyta). Phycologia 22: 133–140Google Scholar
  3. Bolton, J. J., Lüning, K. (1982). Optimal growth and maximal survival temperatures of Atlantic Laminaria species (Phaeophyta) in culture. Mar. Biol. 66: 89–94Google Scholar
  4. Daly, M. A., Mathieson, A. C., Norall, T. L. (1979). Temperature, salinity, turbidity, and light attentuation in the Great Bay Estuary system, 1974–1978 Jackson Estuar. Lab. Contr. No. 85Google Scholar
  5. Davison, I. R. (1987). Adaptation of photosynthesis in Laminaria saccharina (Phaeophyta) to changes in growth temperature. J. Phycol. 23: 273–283Google Scholar
  6. Davison, I. R., Davison, J. O. (1987). The effect of growth temperature on enzyme activities in the brown alga Laminaria saccharina. Br. Phycol. J. 22: 77–87Google Scholar
  7. Du Bois, K. R. (1986). Differential effects of temperature on growth, survivorship, and photosynthesis by two populations of Laminaria saccharina (L.) Lamour. M. S. Thesis, State University of New York, Stony BrookGoogle Scholar
  8. Duncan, M. J., Harrison, P. J. (1982). Comparison of solvents for extracting chlorophylls from marine macrophytes. Botanica mar. 25: 445–447Google Scholar
  9. Fortes, M. D., Lüning, K. (1980). Growth rates of North Sea macroalgae in relation to temperature, irradiance and photoperiod. Helgoländer wiss. Meeresunters. 34: 15–29Google Scholar
  10. Gerard, V. A. (1988) Ecotypic differentiation in light-related traits of the kelp, Laminaria saccharina. Mar. Biol. 97: 25–36Google Scholar
  11. Gerard, V. A., DuBois, K., Greene, R. (1987) Growth responses of two Laminaria saccharina populations to environmental variation. Hydrobiologia 151/152: 229–232Google Scholar
  12. Hoek, van den C. (1975). Phytogeographic provinces along the coasts of the northern Atlantic Ocean. Phycologia 14: 317–330Google Scholar
  13. Hoek, van den C. (1982). The distribution of benthic marine algae in relation to the temperature regulation of their life histories. Biol. J. Linn. Soc. 18: 81–144Google Scholar
  14. Innes, D. J. (1984). Genetic differentiation among populations of marine algae. Helgoländer wiss. Meeresunters. 38: 401–417Google Scholar
  15. Lee, J.-A. (1987). Environmental regulation of the reproduction and recruitment of Laminaria saccharina L. (Lamour.) at the Southern limit of its distribution in the northwestern Atlantic Ocean. Ph.D. Thesis, State University of New York, Stony BrookGoogle Scholar
  16. Lüning, K., Chapman, A. R. O., Mann, K. H. (1978). Crossing experiments in the non-digitate complex of Laminaria from both sides of the Atlantic. Phycologia 17: 293–298Google Scholar
  17. Lüning, K., Guiry, M. D., Masuda, M. (1987). Upper temperature tolerance of North Atlantic and North Pacific geographical isolates of Chondurs species (Rhodophyta). Helgoländer wiss. Meeresunters. 41: (in press)Google Scholar
  18. Norall, T. L., Mathieson, A. C., Penniman, C. E. (1983). Nutrient and hydrographic data for the Great Bay Estuarine system, New Hampshire-Maine. Part I: September, 1973 to December, 1975. University of New Hampshire Mar. Program, UNH-D/ TR-83-1Google Scholar
  19. Novaczek, I. (1984). Reponse of gametophytes of Ecklonia radiata (Laminariales) to temperature in saturating light. Mar. Biol. 82: 241–245Google Scholar
  20. Parke, M. (1948). Studies on British Laminariaceae. I. Growth in Laminaria saccharina (L.) Lamour. J. mar. biol. Assoc. U.K. 27: 651–709Google Scholar
  21. Rietema, H., van den Hoek, C. (1984). Search for possible latitudinal ecotypes of Dumontia contorta (Rhodophyta). Helgoländer wiss. Meeresunters. 38: 389–399Google Scholar
  22. Sokal, R. R., Rohlf, F. J. (1981). Biometry, 2nd ed., W. H. Freeman and Co., New YorkGoogle Scholar
  23. Yarish, C., Breeman, A. M., van den Hoek, C. (1986). Survival strategies and temperature responses of seaweeds belonging to different biogeographic distribution groups. Botanica mar. 29: 215–230Google Scholar

Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • V. A. Gerard
    • 1
  • K. R. Du Bois
    • 1
  1. 1.Marine Sciences Research CenterState University of New YorkStony BrookUSA

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