Abstract
Rates of NO -3 uptake by individual blades of Macrocystis pyrifera (L.) C. Agardh were measured at different flow rates in the laboratory. Dissolution rates of hemispherical, plaster buttons attached to the blade surface provided a relative measure of flow rates over blades used in uptake experiments and also over intact blades of adult kelp plants in situ (Laguna Beach, California, USA; 1981). Laboratory results indicated that uptake was saturated at a flow rate equivalent to 2.5 cm s-1 current velocity. Flow rates over intact blades in situ always exceeded this uptake saturation level. Wave surge and movement of plant surfaces relative to the surrounding water provided sufficient flow to saturate uptake, even in a dense kelp canopy during low-current and calm sea-state conditions.
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Literature Cited
Anderson, S. M. and A. C. Charters: A fluid dynamics study of seawater flow through the bushy algal macrophyte, Gelidium nudifrons. Limnol. Oceanogr. (In press)
Bascom, W.: Waves and beaches, 267 pp. New York: Anchor Books 1964
Conover, J. T.: The importance of natural diffusion gradients and transport of substances related to benthic marine plant metabolism. Botanica mar. 11, 1–9 (1968)
Doty, M. S.: Antecedent event influence on benthic marine algal standing crops in Hawaii. J. exp. mar. Biol. Ecol. 6, 161–166 (1971)
Gerard, V. A.: In situ rates of nitrate uptake by giant kelp (Macrocystis pyrifera (L.) C. Agardh): tissue differences, environmental effects, and predictions of nitrogen-limited growth. J. exp. mar. Biol. Ecol. (In press)
Gerard, V. A. and K. H. Mann. Growth and production of Laminaria longicruis (Phaeophyta) populations exposed to different intensities of water movement. J. Phycol. 15, 33–41 (1979)
Haines, K. C. and P. A. Wheeler: Ammonium and nitrate uptake by the marine macrophytes Hypnea musciformis (Rhodophyta) and Macrocysts pyrifera (Phaeophyta). J. Phycol. 14, 319–324 (1978)
Jackson, G. A. and C. D. Winant: Effect of a kelp forest on coastal currents. (In preparation)
Manley, S. L.: Micronutrient uptake and translocation in Macrocystis pyrifera (Phaeophyceae). J. Phycol. (In press)
McFarland, W. N. and J. Prescott: Standing crop, chlorophyll content, and in situ metabolism of a giant kelp community in Southern California. Contr. mar. Sci. Univ. Tex. 6, 109–132, (1959)
Schumacher, G. J. and L. A. Whitford: Respiration and P32 uptake in various species of freshwater algae as affected by a current. J. Phycol. 1, 78–80 (1965)
Steever, E. Z., R. S. Warren and W. A. Niering: Tidal energy subsidy and standing crop production of Spartina alterniflora. Estuar. cstl mar. Sci. 4, 473–478 (1976)
Strickland, J. D. H. and T. R. Parsons: A practical handbook of seawater analysis, 2nd ed. Bull. Fish. Res. Bd Can. 167, 1–310 (1972)
Westlake, D. F.: Some effects of low-velocity currents on the metabolism of aquatic macrophytes. J. exp. Bot. 18, 187–205 (1967)
Wheeler, W. N.: Ecophysiological studies on the giant kelp, Macrocystis, 179 pp. Ph. D. thesis, University of California at Santa Barbara 1978
Wheeler, W. N.: Effect of boundary layer transport on the fixation of carbon by the giant kelp Macrocystis pyrifera. Mar. Biol. 56, 103–110 (1980)
Whitford, L. A. and G. J. Schumacher: Effect of current on mineral uptake and respiration by a freshwater alga. Limnol. Oceanogr. 6, 423–425 (1961)
Whitford, L. A. and G. J. Schumacher: Effect of current on respiration and mineral uptake in Spirogyra and Oedogonium. Ecology 45, 168–170 (1964)
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Communicated by N. D. Holland, La Jolla
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Gerard, V.A. In situ water motion and nutrient uptake by the giant kelp Macrocystis pyrifera . Mar. Biol. 69, 51–54 (1982). https://doi.org/10.1007/BF00396960
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DOI: https://doi.org/10.1007/BF00396960