Table 3.

Biofilm and MiSeq sample characteristics

Sample name	Scraped off biofilm area [cm2]		Bacterial 16S rRNA genes/cm2 biofilmb	Sequence reads per sample	OTUs	Phylogenetic diversity
	White biofilm	Brown biofilm
Sample_1a	6.3	0	4.8 ± 2.9 × 108	43,410 ± 33,216	140 ± 3.2	3.9 ± 0.2
Sample_2	6.3	0	4.2 ± 2.0 × 108	52,014	138	4.2
Sample_3	22.3	4	9.8 ± 4.3 × 109	42,427	108	3.8
Sample_4	22.3	8	13 ± 5.7 × 109	53,124	109	4.1

^aAverage of three samples

^bCalculated based on liquid and biofilm protein (white biofilm 233 mg, brown biofilm 2485 mg) in the sample