It’s hard being a plant leaf - being eaten is a major risk. In tropical forests, ~10-15% (>70% in some species) of leaf area can be lost via herbivory (Cardenas et al., 2014; Coley & Barone, 1996). Plants may counteract herbivory via resistance, where chemical or mechanical defenses are used to deter herbivores, or resilience, where the effect of unavoidable damage is mitigated (Kursar & Coley, 1996).
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