Figure 4
Graphs showing changes in [Mg2+], [Ca2+], [Si4+], [Cl-], and pH in the wetland (black diamonds), abiotic control (red triangles), unamended (green circles), and amended microbial mat (blue squares) microcosms with time. The data is presented as a 2-day moving average. The arrow on the Mg-graph indicates the day when new microbial growth was seen as greening of the microbial mats in the amended microcosm. The arrows placed on the Cl-graph show the occurrences of two rainfall events on days 7 (2.6 mm) and 8 (6.5 mm). The pH graph also displays wetland temperature (black open diamonds), which matches microcosm temperatures.