Dictionary.com
definitions

bioturbation

[bahy-oh-tur-bey-shuh n]

noun

the alteration and disturbance of a site by living organisms; the turning and mixing of sediments by organisms, as rodents.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Science definitions for bioturbation

bioturbation

[bī′ō-tər-bā′shən]

The stirring or mixing of sediment or soil by organisms, especially by burrowing, boring, or ingestion.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.