Ecological Archives E087-095-A1

Cindy M. Hale, Lee E. Frelich, and Peter B. Reich. 2006. Changes in hardwood forest understory plant communities in response to European earthworm invasions. Ecology 87:1637–1649.

Appendix A. Correlation coefficients (Pearson r) of herbaceous plant species total cover with ordination axis and the number of plots each species was found (total n = 168).


Species

n

Axis 1

Axis 2

Axis 3


Carex species

57

   0.403

 0.479

 0.405

Circaea lutetiana

12

0.136

0.256

-0.222

Oryzopsis species

2

0.128

-0.104

-0.063

Allium tricoccum

3

0.123

0.110

0.041

Arisaema triphyllum

126

0.089

0.141

-0.331

Maianthemum canadense

15

   0.030

-0.260

0.184

Viola selkirkii

9

-0.012

0.008

0.012

Aralia nudicaulis

8

-0.013

-0.144

-0.086

Impatiens species

2

-0.047

0.036

0.025

Trillium species

9

-0.054

0.035

0.173

Viola species

8

 -0.060

-0.012

0.002

Galium species

4

-0.094

0.049

0.067

Polygonatum commutatum

5

-0.102

-0.259

0.076

Streptopus roseus var. longipes

15

-0.116

-0.247

0.161

Anemone quinquefolia

31

-0.123

-0.148

0.242

Trillium cernuum

5

-0.129

-0.005

0.155

Solidago flexicaulis

6

-0.149

0.049

0.083

Galium aparine

3

-0.153

0.101

-0.057

Matteuccia struthiopteris

13

-0.154

-0.064

0.019

Caulophyllum thalictroides

22

-0.164

0.007

0.093

Equisetum species

20

-0.167

-0.034

0.133

Thalictrum dioicum

4

-0.171

0.004

-0.191

Botrychium virginianum

18

-0.174

-0.024

0.082

Equisetum hyemale var. affine

31

-0.186

-0.032

0.295

Galium triflorum

8

-0.189

0.222

-0.145

Athyrium felix-femina

15

-0.205

-0.141

-0.137

Sanguinaria canadensis

44

-0.211

-0.027

  -0.100

Phryma leptostachya

10

-0.237

-0.059

-0.041

Aralia racemosa

14

-0.281

-0.035

0.194

Asarum canadense

15

-0.296

-0.002

-0.004

Sambucus pubens

34

-0.317

  0.380

-0.299

Smilacina racemosa

51

-0.381

-0.117

0.304

Viola pubescens

58

-0.385

0.002

0.179

Laportea canadensis

46

-0.418

0.311

0.068

Hydrophyllum virginianum

52

-0.442

0.135

-0.093

Osmorhiza claytonii

47

-0.442

0.119

-0.031

Uvularia grandiflora

82

-0.458

-0.488

  0.620

Polygonatum pubescens

58

-0.483

-0.198

0.015




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