Abstract
Zooplankton from 87 stations in the Bering, Chukchi and Beaufort Seas sampled in 1985, 1986 and 1987 showed a geographic gradient in stable carbon-isotope ratios (δ13C). The zooplankton most depleted in 13C were found in the central and eastern Beaufort Sea and those most enriched were from the Bering and Chukchi Seas. Average δ13C values ranged from-20.9 to-26.7‰ for copepods and from-19.4 to-25.1‰ for euphausiids. Euphausiids show a minimum of 1.0‰ enrichment relative to copepods throughout the study area. Relative biomasses of the major zooplankton taxa varied significantly across the Alaskan Beaufort Sea in October 1986, with euphausiids dominating in the west and copepods in the east. These differences in taxonomic composition affected the weighted δ13C values for “total” zooplankton and may produce an even more pronounced geographic gradient in zooplankton δ13C than that found within a single taxon. The bowhead whale Balaena mysticetus migrates between wintering areas in the Bering Sea and summering areas in the Beaufort Sea and feeds over this geographic range. The zooplankton δ13C gradient is the probable source of δ13C oscillations found along the baleen plates of this planktivore.
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Literature cited
Aagaard, K. (1984). The Beaufort undercurrent. In: Barnes, P.W., Schell, D. M., Reimnitz, E. (eds.) The alaskan Beaufort Sea: ecosystems and environments. Academic Press, Orlando, Florida, p. 47–71
Bradstreet, M. S. W., Thomson, D. H., Fissel, D. B. (1987). Zooplankton and bowhead whale feeding in the Canadian Beaufort Sea, 1986. In: Bowhead whale food availability characteristics in the southern Beaufort Sea: 1985 and 1986. (Envir. Stud. 50: 1–204; available from Department of Indian and Northern Affairs, Ottawa, Canada: Catalogue Nr. R71-19/50-1988E)
Carroll, G. M., George, J. C. Lowry, L. F. Coyle, K. O. (1987). Bowhead whale (Balaena mysticetus) feeding near Point Barrow, Alaska, during the 1985 spring migration. Arctic 40: 105–110
Conover, W. J. (1980). Practical nonparametric statistics. John Wiley, New York
Conover, W. J., Iman, R. L. (1981). Rank transformations as a bridge between parametric and nonparametric statistics. Am. Statistn 35: 124–129
DeNiro, M., Epstein, S. (1978). Influence of diet on the distribution of carbon isotopes in animals. Geochim. cosmochim. Acta 42 (N5): 495–506
DesMarais, D. J., Hayes, J. M. (1976). Tube cracker for opening glass-sealed ampules under vacuum. Analyt. Chem. 48: 1651–1652
Dunton, K. H. (1985). Trophic dynamics in marine nearshore systems of the Alaskan high arctic. Ph.D dissertation, University of Alaska, Fairbanks, Alaska
Dunton, K. H., Saupe, S. M., Golikov, A. N., Schell, D. M., Schonberg, S. V. (1989). Trophic relationships and isotope gradients among arctic and subarctic marine fauna. Mar. Ecol. Prog. Ser. 56: 89–97
Greene, C. H., Wiebe, P. H., Burczynski, J., Youngbluth, M. J. (1988). Acoustical detection of high-density krill demersal layers in the submarine canyons off Georges Bank. Science, N.Y. 241: 359–361
Griffiths, W. B., Thomson, D. H., Johnson, G. E. (1987). Zooplankton and hydroacoustics. In: Richardson, W. J. (ed.) Importance of the Eastern Alaskan Beaufort Sea to feeding bowhead whales, 1985–86 Report from LGL Ecological Research Associates, Inc., Bryan, Texas, for U.S. Minerals Management Servic, Reston, Virginia, p. 135–256 (Rep. MMS 87-0037; NTIS PB88-150271/AF; limited distribution)
Hufford, G. L. (1974). On apparent upwelling in the southern Beaufort Sea. J. geophys. Res. 79: 1305–1306
Lowry, L. F., Frost, K. J. (1984). Foods and feeding of bowhead whales in western and northern Alaska. Scient. Rep. Whales Res. Inst., Tokyo 35: 1–16
Lowry, L. F., Frost, K. J., George, J. C., Coyle, K. (1987). Feeding ecology of bowhead whales: prey spectrum and seasonal and regional feeding patterns. Extended abstract. In: Fourth Conference on the biology of the bowhead whale, Balaena mysticetus, 4–6 March 1987, Anchorage, Alaska, p. 16–18. (Copies available from the Department of Wildlife Management, North Slope Borough, Barrow, Alaska)
McConnaughey, T., McRoy, C. P. (1979). Food web structure and the fractionation of carbon isotopes in the Bering Sea. Mar. Biol. 53: 257–262
Mountain D. G. (1974). Preliminary analysis of Beaufort shelf circulation in summer. In: Reed, J. C. and J. E. Sater (eds.) The coast and shelf of the Beaufort Sea. Arctic Institute of North America, Arlington, Virginia, p. 27–48
Park, R., Epstein S. (1961). Metabolic fractionation of 12C and 13C in plants. Pl. Physiol. 36: 133–138
Rau, G. H., Mearns, A. J., Young, D. R., Olson, R. J., Schafer, H. A., Kaplan, I. R. (1983). Animal 13C/12C correlates with trophic level in pelagic food webs. Ecology 64: 1314–1318
Rau, G. H., Sweeney, R. E., Kaplan, I. R. (1982). Plankton 13C:12C changes with latitude: differences between northern and southern oceans. Deep-Sea Res. 29(8A): 1035–1039
Schell, D. M., Saupe, S. M., Haubenstock, N. (1989). Bowhead whale (Balaena mysticetus) growth and feeding as estimated by δ13C techniques. Mar. Biol. 103: 433–443
Springer, A. M. (1988). The paradox of pelagic food webs on the Bering-Chukchi continental shelf. Ph.D. dissertation, University of Alaska Fairbanks, Alaska
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Communicated by M. G. Hadfield, Honolulu
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Saupe, S.M., Schell, D.M. & Griffiths, W.B. Carbon-isotope ratio gradients in western arctic zooplankton. Mar. Biol. 103, 427–432 (1989). https://doi.org/10.1007/BF00399574
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DOI: https://doi.org/10.1007/BF00399574