Abstract

Ants of tropical wet forests are common, yet practically unstudied, despite their importance in nutrient cycling and seed bank dynamics. I investigated the ecology of a leaf litter assemblage of twig-dwelling ants in lowland tropical wet forest and contrasted it with the better known ecologies of ground- and tree-dwelling ants. Nest densities at La Selva, Costa Rica were high (7.48 nests/m 2 ) and potential nest sites were abundant. Colonies moved frequently (residence times for species ranged from 35 to 146 days) from one twig nest to another, occupying a wide range of twig types. Experiments with artificial nests showed that colonization was not reduced by the presence of resident ant colonies

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