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- Title
An exploration of the role of mysids in benthic-pelagic coupling and biomagnification using a dynamic bioaccumulation model.
- Authors
Patwa, Zaheerabbas; Christensen, Rebecca; Lasenby, David C.; Webster, Eva; Mackay, Donald
- Abstract
A mass-balance model for the uptake of organic contaminants in the opposum shrimp (Mysis relicta) is developed. The model describes the concentration in the mysid as a function of time as it grows and its lipid content changes over a two-year life span. The model can describe uptake in varying proportions from pelagic and benthic sources. Four mysid scenarios are considered: entirely pelagic, entirely benthic, half-pelagic and half-benthic, and following the observed seasonal behavior patterns. The seasonal-scenario mysid yields results consistent with levels of total polychlorinated biphenyls reported for Lake Ontario (Canada/USA). The relative sediment and water fugacities are shown to play a critical role in determining the contamination level in mysids. Inclusion of mysids in a simple food-web model demonstrates higher concentrations in upper-trophic-level organisms by two effects: introduction of another trophic level in the food web, and increased benthic-pelagic coupling.
- Subjects
LAKE Ontario (N.Y. &; Ont.); NEW York (State); ONTARIO; MYSIDAE; BENTHIC animals; MYSIS relicta; POLYCHLORINATED biphenyls
- Publication
Environmental Toxicology & Chemistry, 2007, Vol 26, Issue 6, p1224
- ISSN
0730-7268
- Publication type
Article
- DOI
10.1897/06-441R.1