|
|||||
|
|
Nano- and picoplankton growth and production in the Bay of Villefranche sur Mer (N.W. Mediterranean) |
|
| Authors: | R W Sheldon F Rassoulzadegan F Azam T Berman D S Bezanson M Bianchi D Bonin Å Hagström M Laval-Peuto J Neveux P Raimbault A Rivier B Sherr E Sherr F Van Wambeke J Wikner A M Wood C M Yentsch |
| Institution: | (1) Station Zoologique, Boîte Postale 28, 06230 Villefranche sur Mer, France;(2) Northwest Atlantic Fisheries Centre, A1C 5X1 St. John's, Newfoundland, Canada;(3) Department of Ocean Sciences, Memorial University of Newfoundland, A1C 557 St. John's, Newfoundland, Canada;(4) Scripps Inst. of Oceanography, 92092 La Jolla, CA, USA;(5) Kinneret Limnological Laboratory, 14101 Tiberias, Israel;(6) M. S. S. Ltd., 520 Russia Road, BOP 1E0 Berwick, Nova Scotia, Canada;(7) Microbiologie Marine, Luminy Case 901, 13288, 9 Marseille Cedex, France;(8) Centre d'Océnologie, Luminy Case 901, 13288, 9 Marseille Cedex, France;(9) Dept. of Microbiology, University of Umea, S-90187 Umea, Sweden;(10) Lab. de Protistologie Marine, Université de Nice, 06034 Nice, France;(11) Laboratoire Arago, 66650 Banyuls sur Mer, France;(12) College of Oceanography, Oregon State University, 97331 Corvallis, OR, USA;(13) Department of Biology, University of Oregon, 97403 Eugene, OR, USA;(14) Bigelow Laboratory, 04575 West Boothbay Harbor, ME, USA;(15) Dept. of Fisheries and Oceans, P.O. Box 5667, A1C 5X1 St. John's, Newfoundland, Canada |
| Abstract: | Plankton production in the Bay of Villefranche was relatively constant during March and April 1986 but the particle size at which the production occurred was more variable. At the beginning of the study, production was dominated by the larger (ca. 6  m) flagellates but towards the end it was more or less equally divided between the nano- and picoplankton. There were considerable differences in the estimates of population growth rates, depending on the methods used, but on average the population doubling times were close to 12 hours for autotrophs and 24 hours for heterotrophs. As autotrophs do not grow during the night, each population was therefore doubling once per day. It seemed that each of the nanoor picoplankton populations could adversely affect the growth of the others. This could be either by simple predation or by some form of inhibition. Although nutrient levels in the bay were uniformly low, the addition of nutrients did not always stimulate algal growth. The plankton populations seemed to be both in a state of equilibrium and intense ecological competition. |
| Keywords: | Nanoplankton picoplankton growth-rates production oligotrophic |
| 本文献已被 SpringerLink 等数据库收录！ | |