Keystone species in seed dispersal networks are mainly determined by dietary specialization - Mello, Marco A. R; Rodrigues, Francisco Aparecido; Costa, Luciano da Fontoura; Kissling, W. Daniel; Sekercioglu, Çagan H.; Marquitti, Flavia Maria Darcie; Kalko, Elisabeth Klara Viktoria (Oikos Journal: Synthesising Ecology, 2015)