Figure 3
From: Environmental filtering and community delineation in the streambed ecotone
Daily amplitude of temperatures (T, °C), vertical flux profiles (VF, m/day) and ferrous iron concentration (Fe2+, mg/L) at each sampling site. Temperature profiles consist of 24 lines for each hour of a diurnal cycle and are averaged based on 4 weeks of data (16/05/2016 to 16/06/2016). Thermal extinction depth (TED) is marked as a red dotted-line between the two temperature sensors in which the amplitude of daily temperature variation becomes undetectable. VF: The mean vertical flux between two neighbouring temperature sensors calculated with the 1-D numerical model VFLUX (Matlab) using the Hatch amplitude method29. Dots represent mean temperature values for every 2 h during the day (12 dots per depth), while horizontal lines represent the standard deviations. Positive VF mean values indicate downward flux, negative values indicate an upward flux. Fe2+: Vertical profile of ferrous iron concentrations based on one peeper deployment per sampling site (indirect measurement of the redox conditions).
