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Dataset Totals

Total Number of Organisms:
32
Total Number of Species:
11
Average population size:
2.909
Decimal Accuracy:
4
Total Number of Regions:
1
Total Number of Region Sets:
1

Alpha Biodiversity [α]

Simpson Index(∑(ni(ni-1)/(N(N-1))))
0.1089
Simpson Index Approximation(∑((n/N))2)
0.1367
Dominance Index(D = 1 - Simpson)
0.8911
Dominance Index Approximation(D = 1 - Simpson)
0.8633
Reciprocal Simpson Index(1 / Simpson)
9.185
Alternate Reciprocal Simpson Index(1 / Simpson)
7.314
Shannon Indexlog
3.094
Berger-Parker Dominance IndexS/N^.5
0.1875
Shannon Indexln
2.145
Inverted Berger-Parker Dominance IndexS/N^.5
5.333
Shannon Index%
-0.9314
Margalef Richness IndexS/N^.5
2.885
Menhinick IndexS/N^.5
1.945
Rényi Entropy/Hill Numbers (r=0,1,2,∞)e^H/S
11, 8.545, 7.314,
Buzas and Gibson's Indexe^H/S
0.7762
Gini Coeffificient(2*sum(i*ni)/n*sum(ni))-(N+1)/N
0.3807
Equitability IndexS/N^.5
0.8944
ln() of Hill Numbers (0,1,2,∞):
2.398, 2.145, 1.99, -

Beta Biodiversity [β]

Comparing two sample areas

Absolute beta Value ((S0-c)-(S1-c)...):
10
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:
3.667
Jaccard Index (%):
-100%
Mountford Index:
-0.2222
Number of Common Species:
11
Mountford Index (%):
-22.22%
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.


Static Charts



All Populations


Common Species


Simpson Index


Preston diagram


Renyi/Hill graph


Renyi/Hill graph (ln)


Lorenz graph


Rarefaction Curve

Dynamic Charts


Interactive Data