Earthworms have great potential for use as bioassay/biomonitor organisms in studies of contaminant uptake and possess many characteristics that make them ideally suited for this purpose (Ma 1982). Studies have demonstrated that native species of earthworms, collected at contaminated sites, can be used to Indicate biologically available levels of these contaminants (Helmke et al. 1979, Ireland 1983, Pietz et al. 1984). However, it Is the species Eisenia foetida (which does ...
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