Extended Data Fig. 2: Other physicochemical parameters.
From: Community rescue in experimental phytoplankton communities facing severe herbicide pollution
Time series of water depth (a), temperature (b), specific conductance (SPC; c), dissolved oxygen (DO; d), and pH (e) during the experiment. Lines are colour-coded by glyphosate treatment while symbols indicate nutrient treatment, as in Extended Data 1. (a,b) Depth and temperature varied over time but not across mesocosms. (c) Mean specific conductance increased slightly over Phase I (from 91 to 116 µS/cm), indicative of solute accumulation in the mesocosms due to evaporation. (d) Dissolved oxygen concentration tracked changes in phytoplankton biomass and was negatively affected by the first glyphosate pulse in the ponds exposed to the highest dose. (e) pH was mostly stable over time, although the highest glyphosate doses temporarily lowered pH by < 1 unit. In Phase II, biomass collapse in most communities decreased dissolved oxygen concentration (d), while specific conductance and pH respectively increased and decreased in all ponds that received the lethal dose irrespective of the response of their phytoplankton community (c,e).
