HR: 10:35h
AN: NG41D-02    [PDF]
TI: Multifractals and plankton
AU: * Currie, W J
EM: wcurrie@socrates.berkeley.edu
AF: Ohio University, Biological Sciences, Athens, OH 45701 United States
AU: Lovejoy, S
EM: shaun@physics.mcgill.ca
AF: McGill University, Physics Department 3600 rue University, Montreal, QC H3A 2T8 Canada
AB: The scaling relationships (m-km) of plankton distributions from transects collected in-situ using CTD and Optical Plankton Counter have been analysed using the double-trace moment multifractal analysis. The scaling behavior has indicated distinct ranges. As expected with turbulence, passive scaling behaviour is seen for the temperature spectra down to the smallest scales. Zooplankton spectra have a scaling discontinuity below which they are no longer "prisoners of turbulence". Fluorescence (phytoplankton) indicated consistent multiple "breaks in scaling" with large-scale and a small-scale turbulence-growth dominated regime but an intermediate rougher region. Zooplankton modify the scaling relationships of the phytoplankton through grazing at these scales. \\
DE: 3250 Fractals and multifractals
DE: 4568 Turbulence, diffusion, and mixing processes
DE: 4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL
DE: 4855 Plankton
SC: Nonlinear Geophysics [NG]
MN: 2003 Fall Meeting