Open Access

Table 2

F values for two-way factorial ANOVA model for physico-chemical variables between rivers and heads/tails of riffles, with 488 degrees of freedom for model error. ⁎P < 0.01, ⁎⁎P < 0.001 significance levels. Df = degrees of freedom.

Treatment Df O2 Df NO3 Df pH
River 3 11.1⁎⁎ 3 56.7⁎⁎ 3 23.03⁎⁎
Head/tail 1 4.9⁎ 1 3.7 1 1.9
River × head/tail 3 2.4 3 2.4 3 2.9
NH4+ Temperature SO42−
River 3 0.7 3 19.35⁎⁎ 3 105.6⁎⁎
Head/tail 1 0.2 1 0.15 1 1.13
River × head/tail 3 4.1 3 0.07 3 2.02
Conductivity Cl Na+
River 3 317.3⁎⁎ 3 54.6⁎⁎ 3 75.08⁎⁎
Head/tail 1 0.7 1 0.06 1 0.07
River × head/tail 3 0.4 3 3.25 3 0.23
PO43− K+ Mg2+
River 3 3.4⁎⁎ 3 58.94⁎⁎ 3 20.3
Head/tail 1 0.47 1 0.06 1 2.3
River × head/tail 3 2.6 3 0.2 3 2.1

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.