๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Herbivores and the Spatial Distributions of the Phytoplankton. I. The Plankton Market

โœ Scribed by Dr. Creighton D. Wirick

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
731 KB
Volume
74
Category
Article
ISSN
1434-2944

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โœฆ Synopsis

Planktonic herbivores forage on phytoplankton cells xvhirh were produced a t some earlier time and a t a distant place. A steady state, one dimension model of the birth, death and eddy diffusion of phytoplankton illustrates phytoplankton smoot.h both temporal and spatial variat,itrns as they are transported. When the eddy diffusivity is k and the phytop1ankt)on doubling time is b, the average distance traveled by a phytoplankton cell is ( k b ) l / ? and the average time spent doing so is b. Only t,hose spatial variations with wavelengths greater than 2n(kb)'" and temporal variations with periods greater than 2nb will be observed in the phytoplankton distributions a t more than half their original amplitude. Both k and b control the length scale of phytoplankton distributions in a Cartesian coordinate system. Planktonic herbivores view the phytoplankton from a diffusing coordinate system in which the spatial scales of the phytoplankton distribution are transformed into time scales.

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