Dataset Totals

Total Number of Organisms:
2211
Total Number of Species:
74
Average population size:
29.878
Decimal Accuracy:
5
Total Number of Regions:
1
Total Number of Region Sets:
1

Alpha Biodiversity [α]

Simpson Index(∑(ni(ni-1)/(N(N-1))))
0.015455
Simpson Index Approximation(∑((n/N))2)
0.0159
Dominance Index(D = 1 - Simpson)
0.98455
Dominance Index Approximation(D = 1 - Simpson)
0.9841
Reciprocal Simpson Index(1 / Simpson)
64.706
Alternate Reciprocal Simpson Index(1 / Simpson)
62.893
Shannon Indexlog
6.0741
Berger-Parker Dominance IndexS/N^.5
0.022614
Shannon Indexln
4.2103
Inverted Berger-Parker Dominance IndexS/N^.5
44.22
Shannon Index%
-1.8285
Margalef Richness IndexS/N^.5
9.479
Menhinick IndexS/N^.5
1.5738
Rényi Entropy/Hill Numbers (r=0,1,2,∞)e^H/S
74, 67.386, 62.893, ≈∞
Buzas and Gibson's Indexe^H/S
0.91047
Gini Coeffificient(2*sum(i*ni)/n*sum(ni))-(N+1)/N
0.24199
Equitability IndexS/N^.5
0.97821
ln() of Hill Numbers (0,1,2,∞):
4.3041, 4.2104, 4.1414, ≈-∞

Beta Biodiversity [β]

Comparing two sample areas

Absolute beta Value ((S0-c)-(S1-c)...):
73
Whittaker's Index (S/alpha):
1
Sørensen's similarity index:
1
Alternate Whittaker's Index (S/alpha-1):
0
Sørensen's similarity index (%):
100%
Jaccard Index:
-1
Routledge beta-R Index:
24.667
Jaccard Index (%):
-100%
Mountford Index:
-0.027778
Number of Common Species:
74
Mountford Index (%):
-2.7778%
Bray Curtis dissimilarity
0

Gamma Biodiversity [γ]

Comparing many sample areas

Absolute gamma (S0+S1...-c):
0
By the definitions used in this calculator, Alpha indices are for a single sample of a single region. This is the most typical way to study and measure biodiversity. These indices are calculated with all data provided to the calculator as a single sample, if you are unsure which indices to use, start with Alpha values. Beta diversity indices compare two sample regions for "similarity" and other correlations of biodiversity between two different areas/regions. For example, studies of mammal populations in 2.5 x 105 hectares of the Rocky Mountains compared to mammal populations in 2.5 x 105 hectares of the Alps. This is less common and requires careful, consistent data collection to be useful. Gamma diversity indices calculator for large or global areas, where many samples are being compared, and are the rarest to use in published studies and articles.


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