Document Detail


Factors affecting methylmercury biomagnification by a widespread aquatic invertebrate predator, the phantom midge larvae Chaoborus.
MedLine Citation:
PMID:  22420993     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
MeHg biomagnification by the phantom midge Chaoborus in relation to MeHg concentrations in their prey and its migratory behavior was investigated in two Canadian Precambrian Shield lakes. Three Chaoborus species with contrasted migratory behavior were collected in a fishless and a fish-inhabited lake. All species accumulated MeHg through their ontogenic development. In the lake inhabited by fish, all instars of Chaoboruspunctipennis displayed a marked migratory behavior and were unable to biomagnify MeHg, whereas in the fishless lake, Chaoborusamericanus and Chaoborustrivittatus biomagnified MeHg. Reduced biomagnification capacity of C. trivittatus, the coexisting species living with C. americanus, was also ascribed to a progressive vertical segregation with age. Growth dilution, amount and type of prey items or trophic position could not explain the different patterns of biomagnification. Our findings demonstrate that the most common invertebrate predator of temperate planktonic food webs can biomagnify mercury, contrarily to previous reports.
Authors:
Anne-Hélène Le Jeune; Floriane Bourdiol; Lama Aldamman; Tania Perron; Marc Amyot; Bernadette Pinel-Alloul
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-13
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  165C     ISSN:  1873-6424     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  -    
Other Details:
Languages:  ENG     Pagination:  100-108     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Groupe de recherche interuniversitaire en limnologie (GRIL), Département de sciences biologiques, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Pavillon Marie-Victorin, Montréal, Québec, Canada H3C 3J7.
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