Table 2. One sided P-values for p(O⩾E) calculated using Fisher's exact test based on the null hypothesis that there was no unevenness in the distribution of form IB rbcL Micromonas-like and Bathycoccus-like sequences between treatments.

Day (Date)	Total number of cases	P-value
1 (7 May)	32	0.760256
4 (10 May)	24	0.000489
7 (13 May)	47	0.000000