“…In comparison to levels found in another green alga, Ulva lactuca (Linnaeus), taken from the approximate same locations in July and August, 1975(Shiber & Washburn, 1978, the copper and iron concentrations in H. tuna were much higher, and lead was also higher Colpomenia sinuosa seemed to concentrate rather high levels of lead compared to levels found in other species of brown algae from various parts of the world (Black & Mitchell, 1952;Stenner & Nickless, 1975 ;Bradfield et al, 1976 ;Seeliger & Edwards, 1977). Cadmium in this alga was either slightly lower than some reported levels for other species (Nickless et al, 1972 ;Stenner &Nickless, 1975 ;Bradfield et al, 1976), or within a similar range (Dutton et al, 1973 ;Leatherland & Burton, 1974;Lande, 1977 ;Bryan & Hummerstone, 1977), whereas copper, nickel and especially iron appeared to be relatively high (Black & Mitchell, 1952 ;Preston et al, 1972 ;Dutton et al, 1973 ;Bradfield et al, 1976 ;Bryan & Hummerstone, 1977) .…”