Fig. 2
Download original image
Biomass (chl a) of periphyton subjected to various nutrient treatments: C = Control, P = PO43−-P, N = NO3−-N, A = NH4+-N, NP = NO3−-N + PO43-P and AP = NH4+-N + PO43−-P. Data bars marked with the same letter for a particular time period, bolds for March and italics for June, are not significantly different from each other (p < 0.05; Tukey's HSD test).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.