As an example of how this kind of analysis
can be reducedt o a practicafl ield tool, we have
constructead dichotomoukse ys ummarizingth e
above model. We again emphasize that strict
applicationo f this key shouldb e limited to other
lakes in the same district having the same
rangeo f enviromnentvaal riable(sin cludinsgo ftbottomeds
ubstrate)O. therwise,p redictives uccessw
ill fall off rapidly (JamesS chneider,p ersonalc
ommunication;W illiam Tonn, personal
observation).