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Table 3 Diversity indices of endophytic bacterial population of the salad vegetables

From: Prevalence of plant beneficial and human pathogenic bacteria isolated from salad vegetables in India

Diversity indices/parameters Formula Carrot Cucumber Onion Tomato
Taxa (S) - 5 4 4 3
Individuals (n) - 31 30 20 21
Dominance (D) D = Sum (ni/n)2 0.3403 0.3933 0.43 0.61
Simpson (1-D) 1 – D = 1 - Sum (ni/n)2 0.6597 0.6067 0.57 0.39
Shannon (H) H = Sum ((ni/n) In (ni/n)) 1.245 1.123 0.9958 0.7091
Evenness (E) E = eH/S 0.6949 0.7684 0.6767 0.6774
Brillouin (HB) HB = In (n) – Sum In (ni) 1.067 0.9698 0.8154 0.5821
Menhinick (db) db = S/ \( \sqrt{n} \) 0.898 0.7303 0.8944 0.6547
Margalef (Ma) Ma = (S-1)/In (n) 1.165 0.882 1.001 0.6569
Equitability (J) J = H/Hmax 0.7738 0.81 0.7183 0.6455
Fisher alpha (FA) S = α*In (1 + n/α) 1.687 1.24 1.504 0.9578
Berger-Parker (d) d = n/nT 0.4194 0.5667 0.55 0.7619
Chao-1 Chao1 = S + F1(F1 - 1)/(2 (F2 + 1)), 5 4 5 3
  1. n = number of individuals; n i = number of individuals of taxon i; S = number of taxa; nT = number of individuals in the dominant taxon
  2. Hmax = log S