. 2014 Jan 31;9(1):e86887. doi: 10.1371/journal.pone.0086887

Table 4. Nonparametric correlation (Spearman’s rho) test between major phylotype and physicochemical parameters.

Major phylotypes	Correlation Coefficient (p-value) with each physicochemical parameter
	Temperature	Salinity	Fluorescence	PO₄ ³⁻	NO₂ ⁻+NO₃ ⁻	NH₄ ⁺	SiO₂
Alphaproteobacteria	0.617	−0.817	0.333	0.468	0.121	0.410	−0.283
	(0.077)	(0.007)	(0.381)	(0.204)	(0.756)	(0.273)	(0.460)
Flavobacteria	−0.500	0.667	−0.317	−0.451	0.130	−0.126	0.417
	(0.170)	(0.050)	(0.406)	(0.223)	(0.739)	(0.748)	(0.265)
Gammaproteobacteria	−0.517	0.650	−0.567	−0.196	0.104	−0.243	−0.017
	(0.154)	(0.058)	(0.112)	(0.614)	(0.790)	(0.529)	(0.966)

In this test, only seawater samples (SW1 to SW9) were analyzed except for melting pond (MP1 to MP4) and ice core (IB and IT) samples. Bold numbers are significant at p ≤ 0.05.