Ecological Archives M076-005-A7

L. R. Vinueza, G. M. Branch, M. L. Branch, and R. H. Bustamante. 2006. Top-down herbivory and bottom-up El Niño effects on Galápagos rocky-shore communities. Ecological Monographs 76:111–131.

Appendix G (Table G1). Repeated-measures ANOVA of treatment and site effects on species richness, diversity, and evenness, based on percentage cover of algae.

Source

Margalef’s richness index (d)

Shannon-Wiener diversity (H´)

Pielou’s evenness (J´)

 

df

MS

F

P

   

MS

F

P

   

MS

F

P

   

Between subjects

                               

Site (S)

1

0.29

33.28

0

   

0.04

3.71

0.061

   

0

0.02

0.896

   

Treatment (T)

4

0.06

6.4

0.05

   

0.06

2.22

0.42

   

0.01

5.1

0.002

   

S × T

4

0.01

1.48

0.228

   

0.03

2.66

0.047

   

0.01

4.12

0.007

   

Residual

40

0.01

       

0.01

       

0

       

Within Subject

       

G-G

H-F

     

G-G

H-F

     

G-G

H-F

Time (t)

8

0.05

18.64

0

0

0

0.14

45.23

0

0

0

0.05

36.19

0

0

0

t × S

8

0.02

9.04

0

0

0

0.06

19.86

0

0

0

0.02

17.16

0

0

0

t × T

32

0.01

1.86

0.004

0.01

0.004

0.01

1.9

0.003

0.013

0.004

0

1.71

0.012

0.026

0.012

t × S × T

32

0

1.36

0.1

0.129

0.1

0.01

1.91

0.003

0.012

0.004

0

1.73

0.01

0.023

0.01

Residual (t)

320

0

       

0

       

0

       

Sphericity test

 

M

P

Epsilon

M

P

Epsilon

M

P

Epsilon

M

P

Within subjects

35

0.28

47.82

0.075

0.759

1

0.169

64.315

0.002

0.715

1

0.141

72.64

0

0.646

0.92

   Notes: The epsilon value is a correction used when the sphericity assumption is not met. The number is multiplied by the numerator and denominator degrees of freedom within the subject test and the outcome used to calculate the significance level according to Greenhouse-Geisser (G-G) and Huynh-Feldt (H-F) adjustments. M = Mauchly’s W. P values of 0.000 were < 0.0001.



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