The bioavailability of pyrethroids to sediment-dwelling species is commonly understood tobe largely influenced by the sediment organic carbon (OC) content. Consequently, sedimentpyrethroid concentrations are frequently OC-normalized. However, bioavailability ofpyrethroids to benthic invertebrates also is influenced by the presence of leaf and plantmaterial. Toxicity of bifenthrin to Hyalella azteca was reduced by the addition of leaf materialto sediments, even when normalized to OC content. Authors noted that this amphipodpreferentially inhabits leaf material, and that this association may reduce exposure to thepyrethroid
đang được dịch, vui lòng đợi..
