| seasonal variation in heavy metal accumulation in subtropical population of the terrestrial isopod, porcellio laevis. | the aim of the present study is to evaluate the seasonal fluctuation of heavy metals in the isopod porcellio laevis at four uncontaminated subtropical locations. this study was carried out at four different field sites in assiut, egypt. the concentrations of cadmium, lead, copper, and zinc in animal, soil, and litter (mug/g dry weight) were monthly recorded during the period from june 2002 till may 2003. there was little difference in metal accumulation trends between the sites. in general, the ... | 2006 | 16399167 |