Table 1.

Summary of isolation steps from two samples collected in February and July 2012

Media	February 2012				July 2012
	CFU		No. of colonies		CFU		No. of colonies
	Total	Colored	Colored*	BChl**	Total	Colored	Colored*	BChl**
PEA	n.t.	n.t.	n.t.	n.t.	7.6×104	6.0×104	10	2
1/10PEA	1.5×105	1.2×105	8	8	8.4×104	3.4×104	12	6
1/10PEG	1.0×105	2.0×104	2	1	2.0×104	2.9×103	2	0
1/100PEA	3.1×104	6.7×103	2	2	6.2×104	2.1×104	5	4
1/100PEG	2.0×104	6.7×103	5	2	4.0×104	1.5×104	8	2
NA	n.t.	n.t.	n.t.	n.t.	3.3×104	2.9×104	1	0
1/6NA	n.t.	n.t.	n.t.	n.t.	4.4×104	2.7×104	7	0
1/60NA	n.t.	n.t.	n.t.	n.t.	6.1×104	2.4×104	6	1

Media; PEA, PEG, PE medium supplemented with agar or gellan gum, respectively; 1/10, 1/100, 10, or 100 times diluted version of the media; NA, nutrient agar; 1/6NA, 1/60NA, 6, or 60 times diluted NA supplemented with agar up to 1.5% CFU; Total, CFU (cm⁻² biofilm) calculated by counting the total number of colonies; Colored, CFU (cm⁻² biofilm) calculated by counting the number of red-, pink-, yellow-, orange- or brown-colored colonies.

n.t., Not tested

^*Number of colored colonies tested to have bacteriochlorophyll

^**Number of bacteriochrolophyll-containing colonies in colored colonies tested