The role of grazers and shredders in the retention and downstream transport of a PCB in lotic environments

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1002/etc.5620131116· OSTI ID:7101660

Sallenave, R M ^[1]; Day, K E ^[2]; Kreutzweiser, D P ^[3]

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1. Univ. of Guelph, Ontario (Canada). Dept. of Environmental Biology
2. National Water Research Inst., Burlington, Ontario (Canada)
3. Forestry Canada, Sault Ste. Marie, Ontario (Canada). Forest Pest Management Inst.

Field studies using flow-through artificial stream channels were conducted between May and October 1992 to study the role of the feeding activity of grazing and shredding invertebrates in promoting downstream transport of 2,2[prime],4,4[prime],5,5[prime]-hexachlorobiphenyl (HCBP). Plant material was labeled with [[sup 14]C]HCBP and fed to selected invertebrate species, and accrual of radioactivity by downstream collector species (Hydropsyche spp.) was measured. Downstream transport of HCBP was significantly increased by the presence of the grazer Elimia livescens in the upstream sections of the channels as demonstrated by significantly higher levels of radioactivity in hydropsychid larvae located downstream. Similarly, movement of HCBP downstream was significantly greater in channels containing the shredder Hydatophylax argus than in channels without shredders. These results suggest that the feeding processes of benthic invertebrates may play an important role in the downstream transport of particle-bound hydrophobic organic compounds.

• OSTI ID: 7101660
• Journal Information: Environmental Toxicology and Chemistry; (United States), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 13:11; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
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INVERTEBRATES
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ORGANIC COMPOUNDS
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UPTAKE
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