Table 4 Two–way ANOVA of the macroplastic litter diversity indices and polymers from Crocodile River.

From: Macroplastic distribution patterns and accumulation in an urbanised Austral subtropical river system

Variable

Sites

Seasons

DF

F

p

DF

F

p

Diversity metrices

 Litter ‘species’ γ–diversity

6

1.797

0.136

3

2.210

0.109

 Abundances

6

1.878

0.120

3

0.598

0.622

 Shannon–Wiener diversity index

6

1.923

0.112

3

3.151

0.040

 Evenness

6

1.232

0.320

3

0.516

0.675

 Whittaker β–diversity

6

0.046

1.000

3

0.043

0.988

Polymer abundances

 Acrylonitrile Butadiene Styrene (ABS)

6

0.396

0.875

3

1.857

0.160

 Cellulose acetate (CA)

6

0.504

0.800

3

0.689

0.567

 Flourocarbon–based rubber (FC)

6

1.412

0.245

3

1.677

0.194

 High–density polyethylene (HDPE)

6

1.167

0.352

3

0.257

0.856

 Low–density polyethylene (LDPE)

6

0.629

0.705

3

0.652

0.588

 Polyisoprene

6

0.918

0.497

3

2.201

0.110

 Polyethylene terephthalate (PET)

6

2.494

0.046

3

0.445

0.722

 Polypropylene (PP)

6

0.435

0.849

3

1.338

0.282

 Polystyrene (PS)

6

2.170

0.076

3

1.145

0.348

 Polyvinyl chloride (PVC)

6

0.652

0.688

3

0.163

0.920

Polymer weight

 Acrylonitrile Butadiene Styrene (ABS)

6

0.957

0.471

3

2.921

0.051

 Cellulose acetate (CA)

6

0.850

0.543

3

1.158

0.343

 Flourocarbon–based rubber (FC)

6

0.899

0.509

3

0.183

0.907

 High–density polyethylene (HDPE)

6

0.774

0.597

3

1.744

0.181

 Low–density polyethylene (LDPE)

6

0.767

0.602

3

1.723

0.185

 Polyisoprene

6

0.948

0.477

3

0.649

0.590

 Polyethylene terephthalate (PET)

6

1.132

0.370

3

1.528

0.229

 Polypropylene (PP)

6

1.692

0.160

3

1.984

0.139

 Polystyrene (PS)

6

1.371

0.261

3

3.187

0.039

 Polyvinyl chloride (PVC)

6

0.711

0.643

3

1.732

0.183

  1. Bold values indicate significant differences at p < 0.05, DF—degrees of freedom.
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