Ecological Archives M077-003-A3

Wayne P. Sousa, Peter G. Kennedy, Betsy J. Mitchell, and Benjamín M. Ordóñez L. 2007. Supply-side ecology in mangroves: do propagule dispersal and seedling establishment explain forest structure? Ecological Monographs 77:53–76.

Appendix C. ANOVAs testing the effects of transect, tidal elevation, species of propagule, and release point on the mean distance moved by marked and released propagules.

ANOVA examining the influence of transect (Transect: BM, PL, or MS), tidal elevation (Elevation: high, mid, or low), species of propagule (Species: Avicennia, Laguncularia, or Rhizophora), and release point (Release point: each species released at three points per elevation on a transect) on the mean distance moved by marked and released propagules. Analysis I compared movements of the three species’ propagules over two-week periods, while Analysis II compared movement over the entire periods of monitoring: four weeks for Avicennia and Rhizophora vs. two weeks for Laguncularia. See text for details. Analyses were mixed-model with Transect and Release point treated as random factors, and Elevation and Species as fixed. Release point was nested within Transect, Elevation, and Species. Distances were log10 (X + 1) transformed prior to analysis.

   

Analysis I

 

Analysis II

Source of variation

df

MS

F

P

 

MS

F

P

Transect (T)

2

4.246

13.226

<0.001

 

3.694

9.099

<0.001

Elevation (E)

2

2.381

4.442

0.096

 

3.263

3.652

0.125

Species (S)

2

147.139

83.712

<0.001

 

120.110

84.703

<0.001

T × E

4

0.536

1.670

0.017

 

0.893

2.200

0.081

T × S

4

1.758

5.475

<0.001

 

1.418

3.493

0.013

E × S

4

0.477

2.183

0.161

 

0.248

1.713

0.240

T × E × S

8

0.218

0.680

0.707

 

0.145

0.356

0.939

Release point
(T × E × S)

54

0.321

6.847

<0.001

 

0.406

6.428

<0.001

Error

1593
1411

0.047

     

0.062

   

† Error df for Analysis I

‡ Error df for Analysis II



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