Table 3 (a) Output of marginal tests for distLM analyses. In bold p < 0.05. (b-d) Output of best solutions for distLM analyses. The best result for each number of variables is shown. In bold the best model according to AICc criteria. 1 = Temperature, 2 = Salinity, 3 = Dissolved oxygen, 4 = pH, 5 = Redox potential

a) Marginal tests

R² = 39.69%

R² = 41.66%

R² = 55.82%

Variable

Pseudo-F

P

Pseudo-F

p

Pseudo-F

P

 Temperature (°C)

4.3821

0.003

5.9770

 < 0.001

9.5981

0.001

 Salinity

1.4479

0.186

1.6571

0.129

0.3392

0.939

 Dissolved oxygen (mL/L)

1.4824

0.174

1.1034

0.331

1.1887

0.268

 pH

1.6074

0.136

1.2198

0.265

1.7748

0.111

 Redox potential (mV)

2.2287

0.053

0.8652

0.487

0.5569

0.736

b) Surface stratum, Bray–Curtis (not transformed)

 AICc

R²

RSS

N° Variables

Selections

 162.33

0.19579

52,932

1

1

 162.08

0.30933

45,459

2

1;5

 164.16

0.34559

43,072

3

1;4;5

 166.82

0.37651

41,037

4

1;2;4;5

170.33

0.39686

39,698

5

All

c) Surface stratum, Bray–Curtis (fourth root)

 147.78

0.24928

25,571

1

1

 149.08

0.30328

23,732

2

1;5

 150.8

0.35165

22,084

3

1;2;5

 153

0.39605

20,572

4

1;2;4;5

 156.49

0.41663

19,871

5

All

d) Deeper stratum, Bray–Curtis (not transformed)

 148.24

0.34778

26,175

1

1

 148.09

0.43703

22,593

2

1;4

 148.66

0.50563

19,840

3

1;3;4

 150.98

0.53683

18,588

4

1;3;4;5

 154.2

0.55832

17,725

5

All