| cu-cd interactions in earthworms maintained in laboratory microcosms: the examination of a putative copper paradox. | earthworms (lumbricus rubellus) from ecton (predominantly cu-contaminated), shipham (cd-contaminated) and dinas powys (uncontaminated, reference) were maintained in the laboratory on soil from the sampling sites. two principle exposure protocols were used: (1) a 4-week 'no pre-exposure experiment', where batches of earthworms were maintained on soils from each habitat and (2) a 'pre-exposure experiment' where uncontaminated control worms were maintained on shipham soil for 4 weeks (the pre-expos ... | 1998 | 9827035 |