Ecological Archives M076-001-A2

John L. Maron, James A. Estes, Donald A. Croll, Eric M. Danner, Sarah C. Elmendorf, and Stacey L. Buckelew. 2006. An introduced predator alters Aleutian Island plant communities by thwarting nutrient subsidies. Ecological Monographs 76:3–24.

Appendix B. Results of nested ANOVAs testing for differences in soil and plant nutrients, stable isotopes, and dwarf shrub biomass. Island type tests for differences between fox-infested vs. fox-free islands. Island identity tests for differences between individual islands nested within island type.

 
Island type
Island identity
 

df

MS

F

P

df

MS

F

P

Soil phosphorus

1,16

3.0

7.3

0.01

16,887

0.41

33.9

0.0001

Soil nitrogen

1,16

1.7

0.5

0.47

16,885

3.1

82.7

0.0001

% N grass

1,16

60.1

11.5

0.004

16,406

5.2

15.2

0.0001

% N A. borealis

1,13

16.2

12.1

0.004

13,182

1.3

4.0

0.0001

δ15N soil

1,16

2244

16.3

0.001

16,629

137.8

15.3

0.0001

δ15N grass

1,16

5477

23.7

0.0001

16,426

231

15.3

0.0001

δ15N A. borealis

1,13

675

12.8

0.0001

13,182

52.6

4.6

0.0001

Dwarf shrub biomass

1,15

1954

19.9

0.0001

15,422

97.8

2.4

0.002

Forb biomass

1,15

281.6

2.7

0.12

15,418

104.7

1.5

0.092



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