Using Lithium (Li+)as a Conservative Tracer Does Not Prevent Algal Uptake of Phosphate in an Acid Mine Drainage Stream (Reply to the Comment by Stewart and Kszos)

In their comment, "Caution on using lithium (Li super(+)) as a conservative tracer in hydrological studies," Stewart and Kszos (1996) make some interesting points about using Li super(+) as a conservative tracer. First, Li super(+) can be hydrologically conservative, but it is not biologically inactive. Second, Li super(+) can be toxic to some organisms.