Effects of tubificid bioturbation on pore structures in sediment and the migration of sediment particles

Environmental Science and Pollution Research International
Yaorui LiZhiyong Guo

Abstract

In this study, the effects of tubificid bioturbation near the water-sediment interface on pore structures and the migration of sediment particles were evaluated using a series of simulations. In these experiments, the distribution and variation of the tubificid burrows and the macropores in the sediment were investigated by X-ray computed tomography (CT) and digital image collecting, without sampling or disturbing the sediment. The migration of the sediment particles was also determined using CT by adding BaSO4 microspheres to the sediment as a tracer. The effects of tubificid bioturbation on the distribution and migration of contaminants in the sediment were verified by adding Pb-containing sediment layers to the sediment. The results indicate that after the addition of the tubificids, both the burrows and the macropores in the sediments increased with time, and the rate of increase slowed gradually. With the increased worm density, the burrows and the pore structures also increased. The in-depth distribution of the burrows and macropores was determined by the settlement time of the worms: with the settlement time increasing from 3 to 19 days, the depth of the zone with the highest density of burrows and macropores increased f...Continue Reading

References

Jan 1, 1972·Annual Review of Biochemistry·B L Vallee, D D Ulmer
Dec 2, 2004·Environmental Pollution·F Mermillod-BlondinJ Gibert
Aug 23, 2005·Environmental Toxicology and Chemistry·Aurélie CiutatAlain Boudou
Aug 12, 2006·Trends in Ecology & Evolution·Filip J R MeysmanCarlo H R Heip
Feb 13, 2007·Environmental Monitoring and Assessment·Ying LuYanbiao Guo
Jun 17, 2008·Ecotoxicology and Environmental Safety·Sandra LagauzèreJean-Marc Bonzom
Jun 5, 2012·Environmental Science and Pollution Research International·Xiuyi HuaDapeng Liang

❮ Previous
Next ❯

Citations

Jul 9, 2020·The Science of the Total Environment·Jiaqing TianXiaomeng Huang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Anthelmintics

Anthelmintics or antihelminthics are a group of antiparasitic drugs that expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host. Discover the latest research on anthelmintics here.

Anthelmintics (ASM)

Anthelmintics or antihelminthics are a group of antiparasitic drugs that expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host. Discover the latest research on anthelmintics here.

Cell Migration

Cell migration is involved in a variety of physiological and pathological processes such as embryonic development, cancer metastasis, blood vessel formation and remoulding, tissue regeneration, immune surveillance and inflammation. Here is the latest research.