With detailed information available for perhaps only a few hundred of the many thousand of species that occur, our current knowledge of the ecology of tropical rainforest trees is limited. This book aims to summarize the contemporary understanding of the ecology of tropical rainforest trees. The emphasis is on comparative ecology, an approach that can help to identify possible adaptive trends and evolutionary constraints and that may also lead to a workable ecological classification for tree species, conceptually simplifying the rainforest community and making it more amenable to analysis.