Publication Detail

Transition-matrix Model of Bioturbation and Radionuclide Diagenesis

David H Shull
12 pp.
MITSG 01-17J
$5.50 DOM / $7.50 INT

Bioturbation in muddy sediments is thought to be due primarily to the reworking activities of benthic deposit feeders. However, current mathematical models of bioturbation do not explicitly link rates of particle mixing with realistic biological reworking mechanisms. To address this problem the author presents a transition- matrix model of bioturbation that quantitatively links the reworking activities of individual organisms and community- level particle-mixing rates. Solutions to the model are presented for two kinds of tracers; particle-reactive radionuclides with a constant input flux and conservative tracers added to the sediment as a pulse.

type: Technical reports

Parent Project

Project No.: 2001-A-5
Title: MIT Sea Grant Center for Coastal Resources

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