Table 1 Best linear models describing the effects of temperature (MAT), pH and salinity on the temperature for maximum activity (Topt) of esterases in: (i) the total active proteins extracted from sediment along the transect from the Irish Sea to the southern Red Sea (see Fig. 1a); (ii) 78 individual esterases of sediment/seawater microbial communities from a subset of ten marine locations selected from the latitudinal transect in (i) (see Fig. 2a); and (iii) 150 individual enzymes from the seawater Tara Ocean dataset (56 locations; see Fig. 2c)

From: Enzyme adaptation to habitat thermal legacy shapes the thermal plasticity of marine microbiomes

Samples

Model

Residual d.f.

R2

AIC

(i) Total active proteins from sediment transect

n = 14

(see Fig. 1a)

Intercept

1,13

110.8619

Temperature

1,12

0.8128

89.0087

pH

1,12

0.29

89.92584

Salinity

1,12

0.043

91.00381

Temperature + Salinity

2,11

0.8009

89.24695

Temperature + pH

2,11

0.795

111.87853

Salinity + pH

2,11

0.8104

111.81935

Temperature + Salinity + pH

3,10

0.045

110.6288

(ii) Individual esterases from sediment transect

n = 78

(see Fig. 2a)

Intercept

1,77

679.2983

Temperature

1,76

0.5735

609.5436

pH

1,76

0.2803

611.2151

Salinity

1,76

0.3449

613.1814

Temperature + Salinity

2,75

0.5699

611.4951

Temperature + pH

2,75

0.5647

646.1708

Salinity + pH

2,75

0.5685

652.9775

Temperature + Salinity + pH

3,74

0.3447

645.1768

(iii) Individual enzymes from seawater, TARA Ocean dataset

n = 150

(see Fig. 2d)

Intercept

1,149

679.2983

Temperature

1,148

0.5735

609.5436

pH

1,148

0.5647

611.2151

Salinity

1,148

0.3449

613.1814

Temperature + Salinity

2,147

0.5699

611.4951

Temperature + pH

2,147

0.5685

646.1708

Salinity + pH

2,147

0.3447

652.9775

Temperature + Salinity + pH

3,146

0.4447

645.1768

  1. The residual degrees of freedom (d.f.) are given. The treatment degrees of freedom and sum of squares only apply to the term that was added to the model. The Akaike information criterion (AIC) was calculated for each model and the lowest AIC (in bold) indicates the best model obtained.