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Dataset Totals

Total Number of Organisms:
1094
Total Number of Species:
35
Average population size:
31.25714
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))))
0.03186473
Simpson Index Approximation(∑((n/N))2)
0.03274968
Dominance Index(D = 1 - Simpson)
0.9681353
Dominance Index Approximation(D = 1 - Simpson)
0.9672503
Reciprocal Simpson Index(1 / Simpson)
31.38266
Alternate Reciprocal Simpson Index(1 / Simpson)
30.53465
Shannon Indexlog
5.019985
Berger-Parker Dominance IndexS/N^.5
0.04387569
Shannon Indexln
3.479588
Inverted Berger-Parker Dominance IndexS/N^.5
22.79167
Shannon Index%
-1.511166
Margalef Richness IndexS/N^.5
4.858812
Menhinick IndexS/N^.5
1.05818
Rényi Entropy/Hill Numbers (r=0,1,2,∞)e^H/S
35, 32.44958, 30.53465,
Buzas and Gibson's Indexe^H/S
0.9270387
Gini Coeffificient(2*sum(i*ni)/n*sum(ni))-(N+1)/N
0.2173936
Equitability IndexS/N^.5
0.9786913
ln() of Hill Numbers (0,1,2,∞):
3.555348, 3.479687, 3.418862, -

Beta Biodiversity [β]

Comparing two sample areas

Absolute beta Value ((S0-c)-(S1-c)...):
34
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:
11.66667
Jaccard Index (%):
-100%
Mountford Index:
-0.06060606
Number of Common Species:
35
Mountford Index (%):
-6.060606%
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