Ecological Archives E094-176-A3

Melanie J. Bishop, Jill Fraser, Paul E. Gribben. 2013. Morphological traits and density of foundation species modulate a facilitation cascade in Australian mangroves. Ecology 94:1927–1936. http://dx.doi.org/10.1890/12-1847.1

Appendix C. ANOVAs examining interacting effects of pneumatophore density and algal morphology on algal retention by experimental plots, and the colonization of plots by epifaunal mollusks.

Table C1. Analyses of variance comparing algal biomass among experimental treatments (6 levels: 1 control, receiving no algae, and 5 algal treatments, receiving one of the morphs) and heights (3, 7, or 10 cm) of pneumatophore mimics in experimental plots. Data were analyzed untransformed. n = l6. Terms significant at α = 0.05 are highlighted in bold.

 

 

 

1 month

 

2 months

 

4 months

 

 

 

df

 

MS

F

p

 

MS

F

P

 

MS

F

p

Treatment

5

 

8.62

105.5

<0.001

 

2.02

37.0

<0.001

 

0.57

17.9

<0.001

 

Control vs. algal morphs

1

 

32.68

12.6

0.024

 

5.82

5.5

0.080

 

0.80

1.7

0.266

 

Among algal morphs

4

 

2.60

26.6

<0.001

 

1.07

16.4

<0.001

 

0.51

14.7

<0.001

Height

2

 

1.17

14.3

<0.001

 

0.53

9.7

<0.001

 

0.21

6.6

0.002

Treatment × height

10

 

0.08

1.0

0.489

 

0.11

2.1

0.036

 

0.05

1.7

0.097

 

Control × height

2

 

0.22

2.7

0.070

 

0.11

2.0

0.141

 

0.07

2.2

0.119

 

Algal morphs × height

8

 

0.04

0.4

0.903

 

0.11

1.7

0.103

 

0.05

1.4

0.193

Residual

90

 

0.08

 

 

 

0.05

 

 

 

0.03

 

 

 

Table C2. Analyses of variance comparing the (a) abundance and (b) richness of eipfanal molluscs among experimental treatments (6 levels: 1 control, receiving no algae, and 5 algal treatments, receiving one of the morphs) and heights (3, 7, or 10 cm) of pneumatophore mimics in experimental plots. Data were analyzed untransformed. n = 6. Terms significant at α = 0.05 are highlighted in bold.

  1. Abundance

 

 

1 month

 

2 months

 

4 months

 

 

 

df

 

MS

F

p

 

MS

F

P

 

MS

F

p

Treatment

5

 

4.2

3.8

0.004

 

1.8

1.4

0.237

 

8.1

0.5

0.756

 

Control vs. algal morphs

1

 

11.0

4.4

0.104

 

1.8

1.0

0.372

 

19.6

3.7

0.126

 

Among algal morphs

4

 

2.5

1.9

0.122

 

1.8

1.4

0.250

 

5.3

0.3

0.855

Height

2

 

1.6

1.5

0.238

 

6.0

4.7

0.012

 

42.5

2.8

0.070

Treatment × height

10

 

2.5

2.3

0.020

 

1.9

1.5

0.150

 

18.5

1.2

0.304

 

Control × height

2

 

0.1

0.1

0.903

 

2.3

1.8

0.177

 

18.1

1.2

0.315

 

Algal morphs × height

8

 

3.1

2.4

0.025

 

1.9

1.4

0.196

 

18.6

1.2

0.324

Residual

90

 

1.1

 

 

 

1.3

 

 

 

15.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Richness

 

 

1 month

 

2 months

 

4 months

 

 

 

df

 

MS

F

p

 

MS

F

p

 

MS

F

p

Treatment

5

 

1.90

5.04

<0.001

 

2.71

4.8

0.001

 

3.4

3.2

0.013

 

Control vs. algal morphs

1

 

5.01

4.44

0.103

 

7.35

4.8

0.095

 

10.7

6.8

0.059

 

Among algal morphs

4

 

1.13

2.55

0.046

 

1.54

2.6

0.041

 

1.6

1.3

0.268

Height

2

 

0.68

1.79

0.173

 

3.58

6.3

0.003

 

3.1

2.9

0.063

Treatment × height

10

 

1.00

2.64

0.007

 

1.54

2.7

0.006

 

1.9

1.8

0.080

 

Control × height

2

 

0.01

0.03

0.966

 

2.22

3.9

0.023

 

2.1

2.0

0.143

 

Algal morphs × height

8

 

1.24

2.81

0.009

 

1.37

2.3

0.027

 

1.8

1.6

0.156

Residual

90

 

0.38

 

 

 

0.56

 

 

 

1.1

 

 


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