Dataset Totals

Total Number of Organisms:
790
Total Number of Species:
24
Average population size:
32.91667
Decimal Accuracy:
7
Total Number of Regions:
1
Total Number of Region Sets:
1

Alpha Biodiversity [α]

Simpson Index(∑(ni(ni-1)/(N(N-1))))
0.04554074
Simpson Index Approximation(∑((n/N))2)
0.04674892
Dominance Index(D = 1 - Simpson)
0.9544593
Dominance Index Approximation(D = 1 - Simpson)
0.9532511
Reciprocal Simpson Index(1 / Simpson)
21.95836
Alternate Reciprocal Simpson Index(1 / Simpson)
21.39087
Shannon Indexlog
4.489296
Berger-Parker Dominance IndexS/N^.5
0.06329114
Shannon Indexln
3.111743
Inverted Berger-Parker Dominance IndexS/N^.5
15.8
Shannon Index%
-1.351413
Margalef Richness IndexS/N^.5
3.447225
Menhinick IndexS/N^.5
0.8538817
Rényi Entropy/Hill Numbers (r=0,1,2,∞)e^H/S
24, 22.46252, 21.39087,
Buzas and Gibson's Indexe^H/S
0.93584
Gini Coeffificient(2*sum(i*ni)/n*sum(ni))-(N+1)/N
0.1982068
Equitability IndexS/N^.5
0.9791348
ln() of Hill Numbers (0,1,2,∞):
3.178054, 3.111848, 3.062964, -

Beta Biodiversity [β]

Comparing two sample areas

Absolute beta Value ((S0-c)-(S1-c)...):
23
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:
8
Jaccard Index (%):
-100%
Mountford Index:
-0.09090909
Number of Common Species:
24
Mountford Index (%):
-9.090909%
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