Ecological Archives M076-001-A4

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 D. Repeated-measures ANOVA results for the first fertilization experiment conducted on Adak Island.

Response variable: graminoid biomass

Source
df
MS
F
P
Between subjects
 
 
 
 
   Fertilization
2
2615
26
0.0001
   Site
1
2.7
2.7
0.87
Within subjects
 
 
 
 
   Year
2
1908
25.0
0.0001
   Year × Fertilization
4
533
7.0
0.001
   Year × Site
2
0.69
0.009
0.99
   Year × Site × Fertilization
4
23.2
0.30
0.87

Response variable: dwarf shrub biomass

Source
df
MS
F
P
Between subjects
 
 
 
 
   Fertilization
2
144.6
1.9
0.17
 
   Site
1
238.2
3.09
0.09
Within subjects
 
 
 
 
   Year
2
1067
16.6
0.0001
   Year × Fertilization
4
463.3
7.2
0.0001
   Year × Site
2
52.8
0.82
0.44
   Year × Site × Fertilization
4
33.4
0.52
0.72

Response variable: species richness

Source
df
MS
F
P
Between subjects
 
 
 
 
   Fertilization
2
24.1
0.77
0.47
   Site
1
30.0
0.96
0.34
Within subjects
 
 
 
 
   Year
2
82.8
12.5
0.0001
   Year × Fertilization
4
20.7
3.1
0.02
   Year × Site
2
1.4
0.21
0.81
   Year × Site × Fertilization
4
9.5
1.4
0.23


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