Agricultural research to improve water quality

Journal of Soil and Water Conservation
By: , and 



ime courses for ingest~on, retention and release via feces of microbial food was investigated
using 2 b~valves w~th d~fferent feeding strategies, Potamocorbula amurensis and Macoma
balthica. The results showed 2 pathways for the uptake of food material in these clams. The first is
represented by an initlal label pulse in the feces. The second pathway operates over longer time
periods. Inert "Cr-labeled beads were used to determine time frames for these pathways. The first
pathway, involving extracellular digestion and intestinal uptake, is relatively inefficient In the
digestion of bacter~al cells by P amurensis but more efficient in M. balthica. The second pathway,
involving intracellular digestion withln the digestive gland of both clams, was highly efficient in
absorb~ng bacterial carbon, and was responsible for most chromium uptake. Differences in the overall
retention of microbial "Cr and I4C relate not to gut-passage times but to the processing and release
strategies of the food material by these 2 clams.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Agricultural research to improve water quality
Series title Journal of Soil and Water Conservation
Volume 46
Issue 3
Year Published 1991
Language English
Publisher Soil and Water Conservation Society
Contributing office(s) Toxic Substances Hydrology Program
Description 5 p.
First page 184
Last page 188