90

Community Analysis Package

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

5

2

0

Sp. 8

8

4

0

Sp. 9

9

9

1

Sp. 10

10

1

0

4

Q1 = 4 agreements/10 species = 0.4

17.16 Q2

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

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