Are predatory birds effective secondary seed dispersers?

Abstract

We thank A. Valido for supplying data on fruit traits and who read an earlier version of the manuscript. F. Valdes gave technical assistance on performing seed viability tests and P. Jordano, D. Wenny, P. Moore, A. Traveset, J. Alonso and C. Nieves provided all kinds of advice. We specially thank the Armadas Espanola (Zona Maritima de Canarias) for transporting the researchers and the equipment to Alegranza.