Environmental Engineering Reference
In-Depth Information
Community data
Species Community 1 abundance (percent-cover) Community 1 abundance (percent-cover)
A
30
12
B
30
12
C
15
12
D
15
12
E
2
12
F
2
12
G
2
12
H
2
12
I
2
4
Total
100
100
1. Simply by inspecting the data, compare the two communities in terms of their
species richness and your opinion of their evenness.
2. Calculate Simpson's Index
Comm1 p
i
2
Comm2 p
i
2
Species
Comm1 p
i
Comm2 p
i
A
B
C
D
E
F
G
H
I
Total
D
¼
D
¼
Simpson's diversity index
¼
1
D: Comm 1: __________
Comm 2: __________
Effective number of species
¼
1/D: Comm 1: _________
Comm 2: __________
3. Calculate Shannon-Weiner Index
Comm1
p
i
Comm1 ln
p
i
Comm1 p
i
ln p
i
Comm2
p
i
Com21 ln
p
i
Comm2 p
i
ln p
i
Species
A
B
C
D
(continued)
