Journal of Plankton Research Vol.23 no.10 pp.1137-1145, 2001
© Oxford University Press 2001
Multiscale patchiness of the calanoid copepod Temora longicornis in a turbulent coastal sea
1 Ocean Ecosystem Dynamics Laboratory, Department Of Ocean Science, Tokyo University Of Fisheries, 4-5-7 Konan, Minato-Ku, Tokyo 108, Japan. 2 Laboratoire De Biologie Et Biotechnologies Marine, Iut Génie Biologique, Université De Caen, Bd Du Maréchal Juin, F-14032 Caen Cedex, France
3 Present Address: Station Marine De Wimereux, Cnrs Upres-A 8013 Elico, Université Des Sciences Et Technologies De Lille, Bp 80,f-62930 Wimereux, France
We present evidence that intermittent variability in zooplankton abundance can be characterized in terms of multifractals. A 3-min-resolution time series of abundance in the calanoid copepod Temora longicornis, taken from a fixed mooring in the coastal waters of the Eastern English Channel for 66 h, provided the data for our analysis. The multifractal nature of the distribution of T. longicornis abundance appears to be very different from those of purely passive scalars (i.e. temperature and salinity), and also from phytoplankton biomass over a similar range of scales in similar environments. Finally, we show that the multifractal distribution of T. longicornis can be wholly described by three basic parameters in the framework of universal multifractals, opening up very large perspectives for future modeling of pelagic ecosystem structures and functions.
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