Re: Freshwater phytoplankton

Jelena <[EMAIL PROTECTED]> schreef
> Besides, in a surface layer of lake sometimes
> I got negative values of concentration of chl a (?) and I am wondering
> how it is possible to get negative value, minimal concentration should
> be zero, not less then zero.

+ + +
Obviously, if you are measuring negative concentrations you are doing
something wrong. More likely in your calculations than in your measurements,
but who knows ...
PvR