Fig. 2. Overview of the prokaryotic species richness obtained.
The grid divides the possible sequencing strategies in rows (MetaB16SV4V5 or metagenome) and the utilization of whole water (>0.22 µm) or size fractions (0.22–3 µm, 3–20 µm and >20 µm) in columns. Color distinguishes between flat and cartridge membrane filters. Within each grid unit, the prokaryotic species richness is plotted against volume, which ranges from 2.5 L to 1000 L.