Document Detail


Effects of benzo(a)pyrene and size of organic matter particles on bioaccumulation and growth of Asellus aquaticus.
MedLine Citation:
PMID:  10948280     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of sediment-bound toxicants to aquatic invertebrates may vary due to differences in bioavailability, food quality, or food structure. The equilibrium partitioning theory (EPT) assumes that organic matter content of sediments and not structure of organic matter is relevant for biological effects of polycyclic aromatic hydrocarbons. To test this hypothesis effects of benzo(a)pyrene (B(a)P) and size of sediment organic matter particles on the bioaccumulation and growth of the waterlouse Asellus aquaticus were studied in laboratory microcosms. Sediments and A. aquaticus were both sampled in an unpolluted, spring-fed pond. The sampled sediment was divided into two portions. From one portion the size of the organic matter particles was mechanically reduced. One set of each sediment fraction (fine and coarse) was spiked with B(a)P and incubated for 3 weeks resulting in a concentration of 70 mg B(a)P per kg sediment. Bioassays of 32 days were performed in a 2 x 2 factorial design with four replicas of each treatment. The results showed that the growth of A. aquaticus was mainly influenced by the size of organic matter particles. Growth was significantly less (27%) on finer sediments than on coarser sediments. The increase in length was 9-14% lower in the spiked sediments, but this difference was not significant. The reduced growth of A. aquaticus on finer sediments may be due to a change in the availability and/or quality of food together with a change in feeding behavior. The coarse and fine spiked sediment types did not differ significantly with respect to the sediment water partition coefficient, the organic carbon water partition coefficient, and the bioconcentration factor. In contrast, the biota to sediment accumulation factors were significantly 15% higher in the cosms with coarse sediments than in cosms with fine sediments. However, this difference is too small to conflict with EPT.
Authors:
E T Peeters; T J De Jager; J A Beijer; A A Koelmans
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  39     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-10-19     Completed Date:  2000-10-19     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-14     Citation Subset:  IM    
Affiliation:
Aquatic Ecology and Water Quality Management Group, Department of Environmental Sciences, Wageningen University, P.O. Box 8080, 6700 DD Wageningen, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Animals
Benzo(a)pyrene / toxicity*
Crustacea / growth & development,  metabolism*
Environmental Pollutants / analysis,  toxicity*
Particle Size
Water Pollutants, Chemical / analysis,  toxicity
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Water Pollutants, Chemical; 50-32-8/Benzo(a)pyrene

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