. 2018 Apr 10;13(4):e0195587. doi: 10.1371/journal.pone.0195587

Table 2. Variable estimator for the independent variables PO₄ (μmol l⁻¹), NO₂ + NO₃ (μmol l⁻¹), Si (μmol l⁻¹), sampling depth (m), snow depth (m), brine salinity (salinity units) and DIC concentration (μmol l⁻¹).

Independent variables were chosen based on Akaike Information Criterion, where NAs did not significantly contribute to the full model. Asterisk denotes statistical significance where p* ≤ 0.05, p** ≤ 0.01 and p*** ≤ 0.001.

	Fv/Fm	Log(Chl a)	Log(rETR_max)	α_PSII	E_k
Intercept	0.213	1.26	3.97	0.283	164
Log(PO₄)	0.0121	0.986***	−0.252***	−0.0562***	−16.6***
Log(NO₂ + NO₃)	−0.00565	0.525***	−0.126*	−0.0287**	NA
Log(Si)	NA	−0.215	0.205*	0.0682***	NA
Sampling depth	0.107***	0.574***	−0.163	0.0614***	−21.7**
Snow depth	NA	NA	−1.619***	−0.127*	−117***
Salinity	NA	NA	−0.0288***	−0.00597***	−0.900
DIC	NA	NA	NA	NA	NA
Adj. R²	0.408	0.520	0.601	0.524	0.476

Table 2. Variable estimator for the independent variables PO4 (μmol l−1), NO2 + NO3 (μmol l−1), Si (μmol l−1), sampling depth (m), snow depth (m), brine salinity (salinity units) and DIC concentration (μmol l−1).

Table 2. Variable estimator for the independent variables PO₄ (μmol l⁻¹), NO₂ + NO₃ (μmol l⁻¹), Si (μmol l⁻¹), sampling depth (m), snow depth (m), brine salinity (salinity units) and DIC concentration (μmol l⁻¹).