Table 3.

Spearman rank correlations between environmental variables and Actinobacteria OTUs dominant at MAR, HNL, and GYR (Actino 3–5) or at UPW (Actino 1).

	Syn	Pro	Peuk	Temp	Sal	PO4	NO3	TChla
Actino 1	n.s	–	n.s	n.s	n.s	0.64∗	n.s	0.73∗
Actino 3–5	0.89∗∗∗	n.s	0.68∗	0.80∗∗	-0.50∗	n.s	n.s	n.s

Syn, Synechococcus cell abundance; Pro, Prochlorococcus cell abundance; Peuk, picoeukaryote cell abundance; Temp, temperature; Sal, salinity; PO4, phosphate concentration; NO3, nitrate concentration; Tchla, total chlorophyll a. Significance level: ^∗∗∗p < 0.0001, ^∗∗p < 0.001, ^∗p <0.05, n.s, non-significant.