Ecological Archives E087-072-A2

Rasmus Ejrnæs, Hans Henrik Bruun, and Bente J. Graae. 2006. Community assembly in experimental grassland: suitable environment or timely arrival? Ecology 87:1225–1233.

Appendix B (Table B1). A summary of the 48 study species.

Records

Opportunists

Month of first introduction

Specialists

Records

111

Rumex acetosa

May

Ranunculus bulbosus

115

101

Plantago lanceolata

May

Galium verum

92

99

Lolium perenne

May

Centaurea scabiosa

90

91

Dactylis glomerata

May

Agrostis capillaris

87

87

Festuca rubra

May

Festuca ovina

82

84

Elymus repens

May

Filipendula vulgaris

80

55

Veronica arvensis

May

Campanula rotundifolia

74

32

Bromus hordeaceus

May

Hieracium pilosella

73

15

Epilobium angustifolium

May

Sedum acre

70

12

Urtica dioica

May

Silene Nutans

59

0

Arabidopsis thaliana

May

Deschampsia flexuosa

20

0

Chenopodium album

May

Aira praecox

0

63

Anthriscus sylvestris

September

Geranium sanguineum

118

58

Medicago lupulina

September

Bromus erectus

109

41

Galium aparine

September

Primula veris

89

16

Trifolium repens

September

Trifolium pratense

83

14

Cirsium arvense

September

Prunella vulgaris

76

7

Tripleurospermum inodorum

September

Lotus corniculatus

65

3

Cichorium intybus

September

Avenula pratense

38

1

Artemisia vulgaris

September

Pimpinella saxifraga

19

0

Arenaria serpyllifolia

September

Trifolium striatum

1

0

Conyza canadensis

September

Erophila verna

0

0

Poa annua

September

Taraxacum Sect. Erythrospermum

0

0

Stellaria media

September

Teesdalia nudicaulis

0

890

 

Total number of occurrencesNS

 

1440

 

15–180 (82.3)

Max height (cm)**

12–120 (45.7)

 
 

0.02–9 (1.6)

Seed weight (mg)NS

0.03–8.6 (1.5)

 
 

0–6 (1.8)

Grime’s stress tolerance**

4–12 (7.7)

 
 

0–12 (4.4)

Grime’s competitive ability**

0–5 (1.7)

 
 

0–12 (5.8)

Grime’s ruderality***

0–6 (2.7)

 
 

6 grasses, 16 forbs, 2 legumes

Life form

6 grasses, 15 forbs, 3 legumes

 
 

10 annuals, 14 perennials

Life history

4 annuals, 20 perennials

 

   Notes: For each species is indicated whether it was sown in spring or autumn in 1998 and how many microcosms it was reported from in July 2000. "†" indicates species that were not observed during the experiment. "‡" indicates annual species. A brief functional summary of the two groups is given below with the range or trait proportions of each attribute. Mean values for Grime’s CSR strategy spectra are calculated using the sum 12 approach (R. Ejrnæs and H. H. Bruun. 2000. Gradient analysis of dry grassland vegetation in Denmark. Journal of Vegetation Science 11:573–584). For the numeric attributes, the mean group value is given in parenthesis and significant between-group differences is indicated after the variable name (NS = nonsignificant, ** = P < 0.01, *** = P < 0.001).



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