This is actually the last sampling event (one of twenty seven) for the mesocosm experiment. So in case I miss it here is a break down of what happens when we go and sample.
Day 1: in situ data collection (sondes, algaetorch and nephlometer), periphyton and maintenance
Day 2: collection of water samples, filtration in the lab for toxins and chlorophyll a, srp analysis and sample fixation for bio-volume counts
Day 3: Night time zooplankton sampling
The final Tuesday job is to collect the periphyton strips from the tanks.
One of the limitations of mesocosm experiments is the wall effect. The wall effect is the artifactual effect of increased periphyton growth as a result of increased wall area to volume ratios. Experiments exploring this effect have found that periphyton biomass increases as a quadratic function of increasing the mesocosm wall area to volume ratio and that there are significant negative correlations between periphyton biomass and the measure of phytoplankton abundance (Chen et al (1997))