Fig. 4. Diversity indexes for yeast in two fermentation yards (patios) processing Spanish-style green olives. Panel A: Menhinick’s diversity index (IMn); panel B: ShannoneWeaver’s diversity index (H0); panel C: Pielou’s evenness index (J0); panel D: Simpson’s reciprocal index (1/D). Ten fermenters were studied at each patio (n ¼ 10); bars indicate standard errors; * indicates a significant difference (p < 0.05). Singleton species and unidentified yeast have been removed from the analyses.