Table 5 Correlations of measured parameters with diversity (Shannon), immigration and abundance (n = 59). Values in bold are significant at p < 0.05

Abundance

0.400

0.002

0.411

0.001

-

-

Acetic acid

0.572*

<0.001

0.464

<0.001

0.503

<0.001

Adipic acid

0.235

0.073

0.192

0.145

0.178

0.180

Br⁻

−0.313

0.016

−0.206

0.117

0.247

0.062

Ca²⁺

0.144

0.274

0.136

0.304

0.602

<0.001

Cl⁻

0.147

0.266

0.083

0.532

0.628

<0.001

EC

0.076

0.568

−0.065

0.627

0.268

0.041

Formic acid

0.580*

<0.001

0.474*

<0.001

0.512

<0.001

Glutaric acid

0.349

0.006

0.069

0.601

−0.117

0.381

Glycolic acid

0.276

0.034

0.147

0.267

0.310

0.018

Potential IN

−0.832*

<0.001

−0.649*

<0.001

−0.472

<0.001

K⁺

−0.235

0.073

−0.177

0.179

0.263

0.046

Malonic acid

0.463

<0.001

0.329

0.01

0.448

<0.001

Mg²⁺

0.008

0.949

−0.010

0.938

0.373

0.004

MSA

0.447

<0.001

0.209

0.111

−0.058

0.661

Na⁺

0.070

0.595

0.004

0.976

0.514

<0.001

NH₄⁺

−0.235

0.074

−0.267

0.041

0.224

0.091

NO₃⁻

0.267

0.041

0.227

0.084

0.585

<0.001

WIOC

0.262

0.045

0.175

0.185

0.847*

<0.001

Oxalic acid

0.462

<0.001

0.453

<0.001

0.459

<0.001

SO₄²⁻

0.064

0.630

0.041

0.759

0.535*

<0.001

Succinic acid

0.456

<0.001

0.341

0.008

0.262

0.046

Temperature

0.203

0.112

0.207

0.116

0.364

0.005

Immigration

0.825

<0.001

-

-

0.411

0.001

Shannon

-

-

0.825

<0.001

0.400

0.002