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Dataset Totals

Total Number of Organisms:
32
Total Number of Species:
8
Average population size:
4
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))))
0.1613
Simpson Index Approximation(∑((n/N))2)
0.1875
Dominance Index(D = 1 - Simpson)
0.8387
Dominance Index Approximation(D = 1 - Simpson)
0.8125
Reciprocal Simpson Index(1 / Simpson)
6.2
Alternate Reciprocal Simpson Index(1 / Simpson)
5.333
Shannon Indexlog
2.647
Berger-Parker Dominance IndexS/N^.5
0.2812
Shannon Indexln
1.835
Inverted Berger-Parker Dominance IndexS/N^.5
3.556
Shannon Index%
-0.7969
Margalef Richness IndexS/N^.5
2.02
Menhinick IndexS/N^.5
1.414
Rényi Entropy/Hill Numbers (r=0,1,2,∞)e^H/S
8, 6.269, 5.333,
Buzas and Gibson's Indexe^H/S
0.7832
Gini Coeffificient(2*sum(i*ni)/n*sum(ni))-(N+1)/N
0.3828
Equitability IndexS/N^.5
0.8825
ln() of Hill Numbers (0,1,2,∞):
2.079, 1.836, 1.674, -

Beta Biodiversity [β]

Comparing two sample areas

Absolute beta Value ((S0-c)-(S1-c)...):
7
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:
2.667
Jaccard Index (%):
-100%
Mountford Index:
-0.3333
Number of Common Species:
8
Mountford Index (%):
-33.33%
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