Abstract
Algal mat communities growing in thermal effluents of production nuclear reactors at the Savannah River Plant, near Aiken, SC, are exposed to large temperature fluctuations resulting from reactor operations. Rates of primary production and species composition were monitored at 4 sites along a thermal gradient in a trough microcosm to determine how these large temperature fluctuations affected productivity and algal community structure. Blue-green algae (cyanobacteria) were the only phototrophic primary producers growing in water above 45°C. These thermophiles were able to survive and apparently adapt to ambient temperatures when the reactor was shut down. The algal mat communities exposed to <45°C were composed of blue-green and eukaryotic algae that adapted rapidly to ambient temperatures. An increase in the percentage extracellular release (PER) of14C-labeled dissolved organic compounds and a decrease in primary production were observed during periods of thermal fluctuation. The results show that the dominant phototrophs in this artificially heated aquatic habitat have been selected for their ability to survive large temperature fluctuations and are similar to those of natural hot springs.
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Bauld, J., and T. D. Brock: Algal excretion and bacterial assimilation in hot spring algal mats. J. Phycol.10, 101–106 (1974)
Belly, R. T., M. R. Tansey, and T. D. Brock: Algal excretion of14C-labeled compounds and microbial interactions inCyanidium caldarium mats. J. Phycol.9, 123–127 (1973)
Boylen, C. W., and T. D. Brock: Effects of thermal additions from the Yellowstone geyser basins on the benthic algae of the Firehole River. Ecology54, 1281–1291 (1973)
Brock, T. D.: Relationship between standing crop and primary productivity along a hot spring thermal gradient. Ecology48, 566–571 (1967)
Brock, T. D.: Vertical zonation in hot spring algal mats. Phycologia8, 201–205 (1969)
Brock, T. D.: High temperature systems. Annu. Rev. Ecol. Sys.1, 191–220 (1970)
Brock, T. D., and J. Hoffmann: Temperature optimum of algae living in the outfall of a power plant on Lake Monona. Trans. Wis. Acad. Sci. Arts Lett.62, 195–203 (1974)
Castenholz, R. W.: The thermophilic cyanophytes of Iceland and the upper temperature limit. J. Phycol.5, 360–368 (1969)
Castenholz, R. W.: Thermophilic blue-green algae and the thermal environment. Bacteriol. Rev.33, 476–504 (1969)
Castenholz, R. W.: The effect of sulfide on the blue-green algae of hot springs. I. New Zealand & Iceland. J. Phycol.12, 54–68 (1976)
Castenholz, R. W.: The biogeography of hot spring algae through enrichment cultures. Mitt. Int. Verein Limnol.21, 296–315 (1978)
Fagerberg, W. R., and H. J. Arnott: Seasonal changes in structure of a submerged blue-green algal/bacterial community from a geothermal hot spring. J. Phycol.14, 445–452 (1979)
Fraleigh, P. C., and R. G. Wiegert: A model explaining successional change in standing crop of thermal blue-green algae. Ecology56, 656–664 (1975)
Goldman, J. C., and H. L. Quinby: Phytoplankton recovery after power plant entrainment. J. Water Pol. Control Fed.51, 1816–1823 (1979)
Jackson, J. E., Jr., and R. W. Castenholz: Fidelity of thermophilic blue-green algae to hot spring habitats. Limnol. Oceanogr.20, 305–322 (1975)
Kopp, J. F., and McKee, G. D.: Methods for chemical analyses of water and wastes. EPA Report No. 600/4-79-020. U.S. Environmental Protection Agency, Washington, D.C. (1979)
Kullberg, R. G.: Algal diversity in several thermal spring effluents. Ecology49, 751–755 (1968)
Landgraf, J. C., and M. J. Starzyk: The blue-green algae in nuclear power plant cooling water. Microbios18, 151–157 (1977)
McMahon, J. W., and A. E. Dochertz: Phytoplankton and cooling systems: temperature effects using different intake and discharge depths. Water Res.12, 925–929 (1978)
Mosser, J. L., and T. D. Brock: Effect of wide temperature fluctuation on the blue-green algae of Bead Geyser, Yellowstone National Park. Limnol. Oceanogr.16, 640–645 (1971)
Rippka, R., J. Deruelles, J. B. Waterbury, M. Herdman, and R. Y. Stanier: Generic assignments, strain histories, and properties of pure cultures of cyanobacteria. J. Gen. Microbiol.111, 1–61 (1979)
Stockner, J. G.: Observations of thermophilic algal communities in Mount Rainier and Yellowstone National Park. Limnol. Oceanogr.12, 13–17 (1967)
Tison, D. L.: Ecology of algal-bacterial mat communities affected by a fluctuating thermal regime. Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, NY (1980)
Tison, D. L., and J. G. Kleyn: Microbial ecology of Olympic Hot Springs. Northwest Sci.53, 58–62 (1979)
Wilde, E. W., and C. B. Fliermans: Fluorescence microscopy for algal studies. Trans. Am. Microsc. Soc.98, 96–102 (1979)
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This paper was prepared in connection with work under Contract No. DE-AC09-76SR00001 with the U.S. Department of Energy.
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Tison, D.L., Wilde, E.W., Pope, D.H. et al. Productivity and species composition of algal mat communities exposed to a fluctuating thermal regime. Microb Ecol 7, 151–165 (1981). https://doi.org/10.1007/BF02032497
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DOI: https://doi.org/10.1007/BF02032497