| Trophic transfer of Cd from natural periphyton to the grazing mayfly Centroptilum triangulifer in a life cycle test. | |
| | |
MedLine Citation:
|
PMID: 19647355 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In streams, periphyton biofilms are important sinks for trace metals such as cadmium and are primary food sources of many invertebrate consumers. To study Cd trophic transfer, we produced differentially contaminated diets by exposing natural periphyton to environmentally relevant dissolved Cd ranging from 0 to 10 microg L(-1) for 6-7 days using a radiotracer approach. On average, periphyton grown during three different seasons bioconcentrated Cd similarly--approximately 1315 (+/-442) -fold above dissolved concentrations. However, mayfly larvae (Centroptilum triangulifer) raised on these differentially contaminated diets (first instar through adulthood) had significantly higher trophic transfer factors from periphyton grown in Aug and Nov 2008 (4.30 +/- 1.55) than from periphyton grown in Jan 2009 (0.85 +/- 0.21). This Cd bioaccumulation difference is only partially explained by apparent food quality and subsequent growth differences. Taken together, these results suggest that primary producers at the base of food webs drive metal bioaccumulation by invertebrate grazers. |
| | |
Authors:
|
Lingtian Xie; David H Funk; David B Buchwalter |
Related Documents
:
|
18020695 - Influence of in-stream diel concentration cycles of dissolved trace metals on acute tox... 15182975 - Atmospheric lead deposition to okefenokee swamp, georgia, usa. 10473795 - Cadmium and lead exposure associated with reduced growth rates, poorer fledging success... 16236595 - Sodium, k, ca, mg, fe, cu, and zn concentrations in molluscs from the magellan strait (... 6179975 - Double-blind food challenge in the diagnosis of food sensitivity in the adult. 15010185 - Effects of food unit size and energy density on intake in humans. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-07-31 |
Journal Detail:
|
Title: Environmental pollution (Barking, Essex : 1987) Volume: 158 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2010 Jan |
Date Detail:
|
Created Date: 2009-11-30 Completed Date: 2010-02-03 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
|
Languages: eng Pagination: 272-7 Citation Subset: IM |
Affiliation:
|
Department of Environmental and Molecular Toxicology, North Carolina State University, Raleigh, NC 27695, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Algae
/
metabolism* Animals Cadmium / metabolism* Environmental Monitoring / methods* Food Chain Insects / metabolism* |
| Chemical | |
Reg. No./Substance:
|
7440-43-9/Cadmium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The organic contamination level based on the total soil mass is not a proper index of the soil conta...
Next Document: Relative proportions of polycyclic aromatic hydrocarbons differ between accumulation bioassays and c...