Technical Comments

Comment on “Why Are There So Many Species of Herbivorous Insects in Tropical Rainforests?”

Science  23 Mar 2007:
Vol. 315, Issue 5819, pp. 1666b
DOI: 10.1126/science.1137249

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Novotny et al. (Reports, 25 August 2006, p. 1115) argued that higher herbivore diversity in tropical forests results from greater phylogenetic diversity of host plants, not from higher host specificity. However, if host specificity is related to host abundance, differences in relative host abundance between tropical and temperate regions may limit any general conclusion that herbivore diversity scales directly with host-plant diversity.

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