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Testing the Evolution of Increased Competitive Ability (EICA) hypothesis in a novel framework

Handley, Richard J. ; Steinger, Thomas ; Treier, Urs A. ; Müller-Schärer, Heinz

In: Ecology, 2008, vol. 89, no. 2, p. 407–417

The “evolution of increased competitive ability” (EICA) hypothesis proposes that escape from natural enemies, e.g., after transcontinental introductions, alters the selection regime because costly defenses no longer enhance fitness. Such an evolutionary loss of defenses enables resources to be directed toward growth or other traits improving performance. We tested the EICA hypothesis in a...