Kissling, W. Daniel
Guimaraes, Jr., Paulo R.
Sekercioglu, Cagan H.
Quental, Tiago B.
Número total de Autores: 5
Afiliação do(s) autor(es):
 Univ Sao Paulo, Dept Ecol, Inst Biociencias, BR-05422970 Sao Paulo - Brazil
 Univ Amsterdam, IBED, POB 94248, NL-1090 GE Amsterdam - Netherlands
 Univ Utah, Dept Biol, Salt Lake City, UT 84112 - USA
 Koc Univ, Coll Sci, TR-34450 Istanbul - Turkey
Número total de Afiliações: 4
Tipo de documento:
Citações Web of Science:
Diet is commonly assumed to affect the evolution of species, but few studies have directly tested its effect at macroevolutionary scales. Here we use Bayesian models of trait-dependent diversification and a comprehensive dietary database of all birds worldwide to assess speciation and extinction dynamics of avian dietary guilds (carnivores, frugivores, granivores, herbivores, insectivores, nectarivores, omnivores and piscivores). Our results suggest that omnivory is associated with higher extinction rates and lower speciation rates than other guilds, and that overall net diversification is negat0ive. Trait-dependent models, dietary similarity and network analyses show that transitions into omnivory occur at higher rates than into any other guild. We suggest that omnivory acts as macroevolutionary sink, where its ephemeral nature is retrieved through transitions from other guilds rather than from omnivore speciation. We propose that these dynamics result from competition within and among dietary guilds, influenced by the deep-time availability and predictability of food resources. (AU)