Terrestrial model food chain and environmental chemicals. I. Transfer of sodium (/sup 14/C)pentachlorophenate between springtails and carabids
A model soil food chain of a ruderal ecosystem has been constructed in order to study the uptake, transfer, and accumulation of (/sup 14/C)pentachlorophenate (PCP-Na). The model was based on three food levels, viz. baker's yeast, collembola, and carabid beetles, and the contaminant chemical introduced was via initial food. Continuous exposure of the organisms to the test chemical resulted in a significant uptake and transfer of radiocarbon into the food chain elements. Bioaccumulation of radiocarbon in the body tissues of the organisms was low, as large amounts taken up were quickly eliminated through the excrements. The radiocarbon level of prey animals was about 100 times higher than that of their predators, but there was only small difference in concentration between collembolas and yeast. This was probably because of a faster excretion of the chemical by the beetles than by the collembolas. During the test period no conversion of (/sup 14/C)PCP-Na took place in the yeast, but the collembolas and beetles metabolized 50 and 59%, respectively. Criteria are proposed for successful implementation of food chain models.
- Research Organization:
- Free Univ. of Berlin (Germany, F.R.)
- OSTI ID:
- 6554212
- Journal Information:
- Ecotoxicol. Environ. Saf.; (United States), Vol. 15:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
CHLORINATED AROMATIC HYDROCARBONS
METABOLISM
FOOD CHAINS
CONTAMINATION
ARTHROPODS
BEETLES
BIOLOGICAL ACCUMULATION
CARBON 14 COMPOUNDS
ENVIRONMENTAL EXPOSURE
SACCHAROMYCES CEREVISIAE
TRACER TECHNIQUES
ANIMALS
AROMATICS
COLEOPTERA
EUMYCOTA
FUNGI
HALOGENATED AROMATIC HYDROCARBONS
INSECTS
INVERTEBRATES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MICROORGANISMS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PLANTS
SACCHAROMYCES
YEASTS
560300* - Chemicals Metabolism & Toxicology
550501 - Metabolism- Tracer Techniques