• 1. Enter your information above and click Submit info.
• 2. Click Add counter + for each taxon. Set whether it is phytoplankton or zooplankton, and for phytoplankton say what you are counting: cells, colonies or filaments.
• 3. When done, click Export data. The file feeds straight into the food web model.

Why the unit matters. A count of "Microcystis: 40" means nothing on its own: 40 cells and 40 colonies differ about eightyfold in biomass, so the food web would be wrong by that much. Record what you actually counted on each card. If you switch mid-count, start a new counter.