Species Composition of the Forest
One of the most striking features of tropical forests is their extraordinary species diversity (MacArthur 1969; Gentry 1982). The diversity of tropical trees supports a remarkable diversity of vertebrate and insect herbivores that have been shown to inflict a more intense pest pressure than in temperate settings (Landsberg and Ohmart 1989; Coley and Barone 1996). As a consequence, both discussions on plant diversity influencing (e.g., Erwin and Scott 1980) and being influenced by herbivore diversity (e.g., Janzen 1970; Connell 1971) have been of far-reaching importance in tropical ecology (for reviews see Crawley 1997; Leigh 1999).
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