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Table 3 ANOVA results for the effects of earthworms and plant community composition on plant growth, plant quality and slug herbivory

From: Herbivory of an invasive slug is affected by earthworms and the composition of plant communities

 

Earthworms

Plant community comp.

Ew x Pl.cc.

Variable

F

P

F

P

F

P

Plant growth

      

Focus spp. leaf length (cm)

0.030

0.863

2.307

0.130

0.056

0.813

A. elatius

0.092

0.763

2.819

0.098

0.208

0.650

P. vulgaris

0.048

0.828

12.106

0.001

2.438

0.124

T. pratense

6.181

0.016

28.918

<0.001

0.028

0.866

Focus spp. tiller numbers (funct. gr.-1)

1.425

0.234

12.396

0.001

1.643

0.201

A. elatius

0.815

0.370

2.481

0.120

2.364

0.129

P. vulgaris

0.014

0.906

7.704

0.007

0.507

0.479

T. pratense

2.700

0.105

9.094

0.004

0.001

0.003

Focus plants shoot biomass

1.119

0.290

4.012

0.045

2.200

0.138

A. elatius shoot mass

4.624

0.032

6.184

0.013

4.948

0.027

P. vulgaris shoot mass

0.629

0.428

0.187

0.665

0.163

0.687

T. pratense shoot mass

0.009

0.926

9.457

0.002

0.006

0.936

Total plant biomass (g mesoc.-1)

3.375

0.073

11.332

0.002

5.246

0.027

Total shoot biomass

2.511

0.120

10.986

0.002

5.751

0.021

Total root biomass

2.770

0.103

4.934

0.032

1.281

0.264

Total grass shoots

0.344

0.560

36.226

<0.001

2.302

0.136

Total forb shoots

2.744

0.105

133.920

<0.001

5.040

0.033

Total legume shoots

0.891

0.350

0.115

0.736

0.304

0.584

Plant quality

      

Total plant C tot (%)

0.096

0.758

0.114

0.736

0.004

0.949

A. elatius Ctot

3.229

0.080

1.800

0.187

0.003

0.955

P. vulgaris Ctot

0.001

0.988

0.018

0.893

0.010

0.922

T. pratense Ctot

1.467

0.232

0.073

0.789

1.416

0.240

Total plant N tot (%)

7.022

0.009

0.215

0.643

0.159

0.691

A. elatius Ntot

5.728

0.021

0.127

0.723

0.056

0.814

P. vulgaris Ntot

5.855

0.017

2.070

0.160

0.098

0.756

T. pratense Ntot

5.604

0.022

0.121

0.730

3.394

0.072

Total plant C:N ratio

6.324

0.013

0.232

0.631

0.045

0.833

A. elatius C:N ratio

5.560

0.023

0.001

0.985

0.095

0.756

P. vulgaris C:N ratio

0.360

0.553

1.484

0.232

0.073

0.789

T. pratense C:N ratio

5.078

0.029

0.001

0.992

2.561

0.117

Slug herbivory

      

No. damaged leaves after 3 days

0.406

0.531

2.075

0.165

0.002

0.965

P. vulgaris leaves damaged

0.006

0.939

4.531

0.041

0.028

0.869

T. pratense leaves damaged

0.138

0.714

5.248

0.033

0.138

0.714

No. damaged leaves after 6 days

7.667

0.012

0.754

0.395

0.087

0.771

P. vulgaris leaves damaged

2.621

0.121

11.346

0.003

1.555

0.227

T. pratense leaves damaged

4.961

0.038

24.719

<0.001

4.613

0.044

Total leaf area eaten mesocosm -1

0.754

0.387

10.371

0.002

3.432

0.066

P. vulgaris leaf area eaten

0.374

0.543

5.500

0.023

1.750

0.191

T. pratense leaf area eaten

0.606

0.440

6.803

0.012

0.010

0.922

  1. P-values after sequential Bonferroni corrrections.