Ecological Archives E090-216-A4

Antonio J. Manzaneda and Pedro J. Rey. 2009. Assessing ecological specialization of an ant–seed dispersal mutualism through a wide geographic range. Ecology 90:3009–3022.

Appendix D. Robust multiple linear regressions examining the relationship among ant species richness and geographical parameters. Separate results are shown for total ant visitors, LDs (legitimate dispersers), and MB (ants with a mixed dispersal behavior).

 

Assemblage

Independent variable

Ant visitors

LDs

MB

Ant dispersers

 

R2

df

χ2

P

R2

df

χ2

P

R2

df

χ2

P

R2

df

χ2

P

Elevation

0.137

10

0.14

0.711

0.137

10

0.14

0.711

0.273

10

0.28

0.601

2.493

10

2.49

0.114

Latitude

0.124

10

0.12

0.724

0.124

10

0.12

0.724

0.287

10

0.29

0.592

2.476

10

2.48

0.115

Elevation × latitude

0.141

10

0.14

0.706

0.279

10

0.28

0.597

2.461

10

2.46

0.116

†  LDs and MB jointly (see Methods).

‡ the low number of cases in relation to the number of parameters in the model precluded the estimation of the interactive effect of latitude and elevation.


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