Abstract
A study of seasonal variations in the pattern of year-to-year changes, for 1948 to 1982, in the abundance of four zooplankton taxa (Pseudocalanus elongatus Acartia clausi, Calanus finmarchicus and Hyperiidea) for the North Sea suggests that an element of the variations, represented at least in part by a quasi-linear downward trend, has its origins in winter and its occurrence through the year is a function of inherent persistence. A downward linear trend is the dominant pattern in the annual fluctuations in abundance of many species of zooplankton throughout the north-east Atlantic and the North Sea. It is argued that it is reasonable to extrapolate from the limited data set included in the detailed study and to assume a winter origin for the pattern wherever it occurs. Some implications for ideas about the dynamics of the plankton ecosystem are considered.
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Colebrook, J. M.: Continuous plankton records: methods of analysis, 1950–1959. Bull. mar. Ecol. 5, 51–64 (1960)
Colebrook, J. M.: The continuous plankton recorder survey: automatic data processing methods. Bull. mar. Ecol. 8, 123–142 (1975)
Colebrook, J. M.: Continuous plankton records: zooplankton and environment, north-east Atlantic and North Sea, 1948–1975. Oceanol. Acta 1, 9–23 (1978)
Colebrook, J. M.: Continuous plankton records: seasonal cycles of phytoplankton and copepods in the North Atlantic Ocean and the North Sea. Mar. Biol. 51, 23–32 (1979)
Colebrook, J. M.: Continuous plankton records: persistence in time-series of annual means of abundance of zooplankton. Mar. Biol. 61, 143–149 (1981)
Colebrook, J. M.: Continuous plankton records: phytoplankton, zooplankton and environment, north-east Atlantic and North Sea, 1958–1980. Oceanol. Acata 5, 473–480 (1982a)
Colebrook, J. M.: Continuous plankton records: persistence in time-series and the population dynamics of Pseudocalanus elongatus and Acartia clausi. Mar. Biol. 66, 289–294 (1982b)
Colebrook, J. M.: Continuous plankton records: seasonal variations in the distribution of plankton in the North Atlantic and the North Sea. J Plankton Res. 4, 435–462 (1982c)
Colebrook, J. M.: Continuous plankton records: relationships between species of phytoplankton and zooplankton in the seasonal cycle. Mar. Biol. 83, 313–323 (1984)
Colebrook, J. M. and A. H. Taylor: Significant time scales of longterm variability in the plankton and the environment. Rapp. P.-v. Réun. Cons. perm. int. Explor. Mer 183, 20–26 (1984)
Glover, R. S.: The continuous plankton recorder survey of the North Atlantic. Symp. zool. Soc. Lond. 19, 189–210 (1967)
Rae, K. M.: Continuous plankton records: explanation and methods, 1946–1949. Hull Bull. mar. Ecol. 3, 135–155 (1952)
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Communicated by J. Mauchline, Oban
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Colebrook, J.M. Continuous plankton records: overwintering and annual fluctuations in the abundance of zooplankton. Mar. Biol. 84, 261–265 (1985). https://doi.org/10.1007/BF00392495
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DOI: https://doi.org/10.1007/BF00392495