Abstract
In order to study the influence of advective processes on the zooplankton distribution in a shallow sill-fjord, we examined the temporal variations (tidal and seasonal) of currents, density, abundance and composition of zooplankton in the Saguenay fjord, Québec, Canada, in August 1978 and October 1979. Our results demonstrate the existence of a regular exchange of water (every tidal cycle) between the St. Lawrence estuary and the two outer basins of the Saguenay fjord which is characterized by an important transport of mesoplankton from the estuary into the deep waters of the Saguenay during the rising tide and from the surface waters of the Saguenay to those of the estuary during falling tide. Variations of abundance and composition of zooplankton in the outer basin are therefore mainly controlled by advective processes. The plankton community of the downstream region of the fjord is strongly influenced by variations of abundance and composition taking place in the estuary, and the establishment and development of local populations of zooplankton are made difficult. In the upstream region of the fjord, the advective processes are less intense and endogeneous mesoplankton populations thrive under local temperature conditions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Littérature citée
Cairns, A. A.: The zooplankton of the Tanquary Fjord, Ellesmere Island, with special reference to calanoid copepods. J. Fish. Res. Bd Can. 24, 555–568 (1967)
Chanut, J. P. et S. A. Poulet: Distribution des spectres de taille des particules en suspension dans le fjord du Saguenay. Can. J. Earth Sciences 16, 240–249 (1979)
De Ladurantaye, R.: Cycle saisonnier et répartition spatiale des Mysidacés dans le fjord du Saguenay, 104 pp. Thèse M. Sc., Université Laval, Québec 1979
De Ladurantaye, R. et G. Lacroix: Répartion spatiale, cycle saisonnier et croissance de Mysis litoralis (Banner, 1948) (Mysidacea), dans un fjord subarctique. Can. J. Zool. 58, 693–697 (1980)
Drainville, G.: Le fjord du Saguenay: contribution à l'océanographie. Naturaliste can. 95, 809–855 (1968)
Forrester, W. D.: Internal tides in the St. Lawrence estuary. J. mar. Res. 32, 55–66 (1974)
Fosshagen, A.: How the zooplankton community may vary within a single fjord system. In: Fjord oceanography, pp. 399–406. Ed. by H. J. Freeland, D. M. Farmer and C. D. Levines. New York: Plenum Press 1980. [NATO Conf. Ser. (Ser. IV: mar. Sciences)]
Gade, H. G.: Deep-water exchanges in a sill fjord: a stochastic process. J. phys. Oceanogr. 3, 213–219 (1973)
Grainger, E. H.: Zooplankton from the Arctic Ocean and adjacent Canadian waters. J. Fish. Res. Bd Can. 22, 543–564 (1964)
Helle, H. B.: Summer replacement of deep water in Byfjord, Western Norway: mass exchange across the sill induced by coastal upwelling. In: Hydrodynamics of estuaries and fjords, pp 441–464. Ed. by J. C. J. Nihoul. Amsterdam: Elsevier 1978
Long, R. R.: Mass and salt transfers and halocline depths in an estuary. Tellus 28, 460–472 (1976)
Lovegrove, T.: The determination of the dry weight of plankton and the effect of various factors on the values obtained. Some contemporary studies in marine science, pp 429–467. Ed. by H. Barnes. London: Allen & Unwin 1966
Rainville, L.: Etude comparative de la distribution verticale et de la composition des populations de zooplancton du fjord du Saguenay et de l'estuaire maritime du Saint-Laurent, 175 pp. Thèse M. Sc., Université Laval, Quebec 1979
Seibert, G. H., R. W. Trites and S. J. Reid: Deep-water exchange processes in the Saguenay Fjord. J. Fish. Res. Bd Can. 36, 42–53 (1979)
Stigebrandt, A.: Vertical diffusion driven by internal waves in a sill fjord. J. phys. Oceanogr. 6, 486–495 (1976)
Stone, D. P.: The distribution of zooplankton communities in a glacial run-off fjord and exchanges with the open sea. In: Fjord oceanography, pp 291–298. Ed. by H. J. Freeland, D. M. Farmer and C. D. Levines. New York: Plenum Press 1980. [NATO Conf. Ser. (Ser. IV: mar. Sciences)]
Strömgren, T.: Zooplankton investigation in Trondheimfjorden 1963–1966. K. norske Vidensk. Sels. Mus. Miscellanea 13, 1–149 (1973)
Strömgren, T.: Some investigations in Skjomen 1969–1973. Astarte 7, 1–15 (1974)
Strömgren, T.: Relationship between freshwater supply and standing crop of Calanus finmarchicus in a Norwegian fjord. In: Freshwater on the sea, pp 173–177. Ed. by S. Skreslet, R. Leinobo, J. B. L. Matthews, E. Sakshaug. Osio: Association of Norwegian Oceanographers 1976. (Proceedings of a Symposium on the Influence of Freshwater Outflow on Biological Processes in Fjords and Coastal Waters)
Sundby, B. and D. H. Loring: Geochemistry of suspended particulate matter in the Saguenay fjord. Can. J. Earth Sciences 15, 1002–1011 (1978)
Taylor, G. B.: Saguenay River sections from fifteen cruises 1961–1974, 38pp. Unpublished manuscript 1975. (Bedford Institute of Oceanography, Data Series BI-D-75-2)
Therriault, J.-C. and G. Lacroix: Penetration of the deep layer of the Saguenay fjord by surface water of the St. Lawrence estuary. J. Fish. Res. Bd Can. 32, 2373–2377 (1975)
Therriault, J.-C. and G. Lacroix: Nutrients, chlorophyll, and internal tides in the St. Lawrence estuary. J. Fish. Res. Bd Can. 33, 2747–2757 (1976)
Therriault, J.-C., R. de Ladurantaye and R. G. Ingram: Particulate matter exchange processes between the St. Lawrence estuary and the Saguenay fjord In: Fjord oceanography, pp 363–366. Ed. by H. J. Freeland, D. M. Farmer and C. D. Levines. New York: Plenum Press 1980: [NATO Conf. Ser. (Ser. IV: mar. Sciences)]
Therriault, J.-C., R. de Ladurantaye and R. G. Ingram: Particulate matter exchanges across the Saguenay fjord sill. Estuar. cstl Shelf Sci. 18, 51–64 (1984)
Yeats, P. A. and J. M. Bewers: Trace metals in the waters of the Saguenay fjord. Can. J. Earth Sciences 13, 1319–1327 (1976)
Author information
Authors and Affiliations
Additional information
Communicated by R. W. Doyle, Halifax
Rights and permissions
About this article
Cite this article
De Ladurantaye, R., Therriault, JC., Lacroix, G. et al. Processus advectifs et répartition du zooplancton dans un fjord. Mar. Biol. 82, 21–29 (1984). https://doi.org/10.1007/BF00392760
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00392760