PiscesLogoSmallerStill Q2

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This is similar to Q1 but takes account of double zeros. It is calculated as agreement divided by the total number of species minus the number of double zeros.

 

Example:  Ten species at two sites:

 

 

Site 1

Site 2

Agreement

Sp. 1

1

3

0

Sp. 2

4

4

1

Sp. 3

6

9

0

Sp. 4

22

23

0

Sp. 5

7

7

1

Sp. 6

5

5

1

Sp. 7

0

0

1

Sp. 8

8

4

0

Sp. 9

2

2

1

Sp. 10

4

1

0

 

 

5

 

Q2 = 5 agreements/(10 species - 1 double zero) = 0.555