Ecological Archives E087-004-A3

John L. Maron and Mathew J. Kauffman. 2006. Habitat-specific impacts of multiple consumers on plant population dynamics. Ecology 87:113–124.

Appendix C. ANOVA results testing the effects of rodent and/or insect exclusion on adult survival of plants from the first (1999) and second (2000) cohort.

Results from mixed-model ANOVAs testing effects of block nested within site, site (random factors), rodent exclusion, insect exclusion (fixed factors) and their interactions on adult survival of plants from the first (1999) and second (2000) cohort.  Survival calculated from Jan. 2000 – September 2004 (first cohort) and Jan. 2001 – September 2004 (second cohort).  Chi-square and F values are reported for random and fixed effects, respectively.

DUNES

   
First cohort
Second cohort
Source
df
or F
P
or F
P
Random          
Block(Site)

1

6.2

0.06

0

0.5

Site

2

0

0.5

0

0.5

Fixed          
Rodent Exclusion

1

0.06

0.81

0.31

0.69

Insect Exclusion

1

0.06

0.81

0.17

0.69

Rodent × Insect

1

0.54

0.47

0.83

0.37

 

GRASSLANDS

   
First cohort
Second cohort
Source

df

or F

P

or F

P

Random          
Block(Site)

1

0.1

0.37

0

0.5

Site

2

0

0.5

0

0.5

Fixed          
Rodent Exclusion

1

4.9

0.57

1.4

0.26

Insect Exclusion

1

0.72

0.40

0.01

0.94

Rodent × Insect

1

0.77

0.40

0.17

0.69



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