Ecological Archives E087-165-A6

Amy L. Freestone. 2006. Facilitation drives local abundance and regional distribution of a rare plant in a harsh environment. Ecology 87:2728–2735.

Appendix F. Summary of ANCOVAs testing for effects of variables on flower and fruit capsule number.

 

Flower number (ln)

Fruit capsule number (ln)

Source of variation

df

F

P

df

F

P

Seep (random)

 
 

>0.9

 
 

> 0.9

Plot nested in seep (random)

 
 

>0.9

 
 

>0.9

Treatment (moss vs. moss removed)

1

1.12

0.3

1

1.15

0.3

Habitat (wet vs. dry)

1

2.98

0.09

1

10.5

0.001

Early-season soil moisture (% saturation)

1

10.6

0.001

 
 

0.1

Ca/ Mg (ppm)

1

15.0

0.0002

1

19.4

<0.0001

ln community biomass (g)

1

2.96

0.09

 
 

0.2

Interactions with treatment

 
 

>0.3

 
 

>0.2

Error

182

 
 

184

 
 

† Nonsignificant and not retained in reduced model (note: treatment was always retained in model).



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