leaf mass, and root length of macrophytes declined
with increasing concentrations of TN and ammonium, while shoot number and root mass did not.
All the measured growth indices of macrophytes declined significantly with ChlaPhyt, while none were significantly related to ChlaPeri.
Neither ChlaPhyt nor ChlaPeri were, however, significantly negatively related to the various N concentrations. Our results indicate that shading by phytoplankton unrelated to the variation in N loading and perhaps toxic stress exerted by high nitrogen were responsible for the decline in macrophyte growth.