black staghorn blue green Cyanobacteria Nostoc The typical ‘cyan’ colour originates from a mix of chlorophyll A & phycocyanobilin. green Aegagropila "Marimo Ball" algae Chara

nutrients 2002 Bachman Relations between trophic state indicators and plant biomass in "Rather than nutrient concentrations controlling macrophyte abundance, it seems that macrophytes acted to modify nutrient concentrations." Bachman, 2002. sucession refs