Cadmium tolerance and adsorption by the marine brown alga Fucus vesiculosus from the Irish Sea and the Bothnian Sea.
Cadmium (Cd) uptake capacities and Cd tolerance of the marine alga Fucus vesiculosus from the Irish Sea (salinity 35 psu) and from the Bothnian Sea (northern Baltic, 5 psu) were quantified. These data were complemented by measurements of changes in maximal photosynthetic rate (P(max)), dark respiration rate and variable fluorescence vs. maximal fluorescence (F(v):F(m)). At concentrations between 0.01 and 1 mmol Cd l(-1), F. vesiculosus from the Bothnian Sea adsorbed significantly more (about 98%) Cd compared with F. vesiculosus from the Irish Sea. The photosynthetic measurements showed that the Bothnian Sea F. vesiculosus were more sensitive to Cd exposure than the Irish Sea algae. The algae from the Irish Sea showed negative photosynthetic effects only at 1 mmol Cd l(-1), which was expressed as a decreased P(max) (-12.3%) and F(v):F(m) (-4.6%). On the contrary, the algae from the Bothnian Sea were negatively affected already at Cd concentrations as low at 0.1 mmol Cd l(-1). They exhibited increased dark respiration (+11.1%) and decreased F(v):F(m) (-13.9%). The results show that F. vesiculosus from the Bothnian Sea may be an efficient sorption substrate for Cd removal from Cd contaminated seawater and this algae type may also have applications for wastewater treatment.
Brinza
Loredana
L
Department of Environmental Engineering, Gh Asachi Technical University of Iasi, Iasi, Romania. l.brinza@earth.leeds.ac.uk
Nygård
Charlotta A
CA
Dring
Matthew J
MJ
Gavrilescu
Maria
M
Benning
Liane G
LG
D000327:Adsorption; D002104:Cadmium / Q000493:pharmacokinetics* / Q000633:toxicity; D005060:Europe; D005453:Fluorescence; D044645:Fucus / Q000187:drug effects / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D009792:Oceans and Seas; D010788:Photosynthesis / Q000187:drug effects; D017186:Titrimetry; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics* / Q000633:toxicity; D018508:Water Purification / Q000379:methods
D014874:Water Pollutants, Chemical; D002104:Cadmium