Phenotypic divergence of traits that mediate antagonistic and mutualistic interactions between island and continental populations of the tropical plant, <i>Tribulus cistoides</i> (Zygophyllaceae).

When we fit Model 1 there was no clear effect of island/continent ( p = .239, Table 1 ), but when we included bioclimatic variables, the effect of island/continent became highly significant ( p = .001, Table 2 ), with petals on the continent being on average 9% longer than petals on islands.

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