A rainforest ant mosaic: the edge effect (Hymenoptera: Formicidae).
The ant mosaic in the edge of a Cameroonian rainforest was studied along 500 m of a dirt road in order to compare it to that of the canopy in the same forest (Dejean et al. 2000; 167 trees studied). The plant species diversity was low (369 plant individuals belonging to 48 species and 28 families). The Euphorbiaceae Alchornea cordifolia was the most frequent species. The ant assemblage was characterized by high abundance but low diversity (22 species in total) with eight "dominant" species, and seven sub-dominant as well as non-dominant species. The dominant species occupied only 69.9% of the plants. The most frequent species, Crematogaster striatula, Pheidole megacephala, Oecophylla longinoda, and Tetramorium aculeatum occupied 25.5%, 18.2%, 13%, and 9.2% of the plants, respectively.