Table 6. Slopes of sinking velocity vs. equivalent spherical diameter (ESD) regressions in each treatment (Amb  =  Ambient, F1and F2  =  Future 1 and Future 2, Ax  =  axenic, HP  =  M. adhaerens HP15).

Treatment	slope	n	r2
15 Amb-Ax	6.5	13	0.88
15 Amb-HP	6.3	11	0.54
15 F1-Ax	6.0	12	0.96
15 F1-HP	6.0	13	0.85
15 F2-Ax	5.5	7	0.57
15 F2-HP	6.6	13	0.91
20 Amb-Ax	4.4	22	0.61
20 Amb-HP	2.2	7	0.78
20 F1-Ax	NA	1	NA
20 F1-HP	2.2	4	0.93
20 F2-Ax	2.3	6	0.86
20 F2-HP	3.3	6	0.32