Physical processes and zooplankton distribution in the Great South Channel : observational and numerical studies

Epstein, Ari W.

doi:10.1575/1912/5624

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…We discuss briefly examples of steady flows analogous to those used in previous treatments (e.g. [9,13]), before moving to time-dependent flows and to more realistic simulations relevant to the flows in the GOM.…”

Section: Concentration Of Depth-keeping Organisms By Fluid Flowmentioning

confidence: 99%

“…Previous papers have applied this idea, (e.g. [5,6,9,13,19]) but have focused more on analytical x-z flows whereas we are interested in flows with complex horizontal structure. As Appendix 1 shows, if the vertical swimming and its random variability overcome the fluid motions and cause clustering around the preferred depth, the biomass density can be represented asb(x, t)F(z) where…”

Section: Concentration Of Depth-keeping Organisms By Fluid Flowmentioning

confidence: 99%

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Copepod Aggregations: Influences of Physics and Collective Behavior

Flierl

Woods

2014

J Stat Phys

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Dense copepod aggregations form in Massachusetts Bay and provide an important resource for right whales. We re-examine the processes which might account for the high concentrations, investigating both horizontally convergent flow, which can increase the density of depth-keeping organisms, and social behavior. We argue that the two act in concert: social behavior creates small dense patches (on the scale of a few sensing radii); physical stirring brings them together so that they merge into aggregations with larger scales; it also moves them into areas of physical convergence which retain the increasingly large patch. But the turbulence can also break this apart, suggesting that the overall high density in the convergence zone will not be uniform but will instead be composed of multiple transient patches (which are still much larger than the sensing scale).

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Section: Concentration Of Depth-keeping Organisms By Fluid Flowmentioning

confidence: 99%

Section: Concentration Of Depth-keeping Organisms By Fluid Flowmentioning

confidence: 99%

Copepod Aggregations: Influences of Physics and Collective Behavior

Flierl

Woods

2014

J Stat Phys

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show abstract

“…Using net-tows, the densest patches were found to range in size from 100-1000 m across, while the vertical extent of these patches is in the range of 1-10 m , ). Observations of peak density within a patch are in the range of 103-104 copepods/m 3 , Beardsley et al (1996)), which is one to three orders-of-magnitude larger than typical values measured in the GOM in springtime (Epstein (1995), ). The temporal persistence of the patches is somewhere between hours and days, however what determines this time scale is unknown (M. Baumgartner, pers.…”

Section: Calanus Finmarchicus and The South Channel Ocean Productivitmentioning

confidence: 70%