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Ecological Processes

Table 3 Pollution index, biological diversity index, evenness index (for phytoplankton and benthic animals), and cumulative risk (CR) at each sampling site

From: Identifying ecological risk and cost–benefit value for supporting habitat restoration: a case study from Sansha Bay, southeast China

Sampling site

Pollution index*

Diversity index

Evenness index

CR

S1

0.91

0.91

0.32

2.53

S2

1.08

1.36

0.55

1.53

S3

0.89

1.02

0.33

3.85

S4

1.04

–

–

5.08

S5

1.01

–

–

5.08

S6

1.04

–

–

5.65

S7

1.07

1.04

0.45

4.20

S8

0.90

–

–

4.01

S9

0.97

1.39

0.44

4.72

S10

0.81

–

–

4.75

S11

1.04

1.84

0.56

1.44

S12

0.96

0.63

0.39

0.63

S13

1.01

1.39

0.45

3.29

S14

0.94

–

–

0.78

S15

0.91

–

–

0.63

S16

1.07

–

–

6.38

S17

0.93

0.65

0.48

1.44

S18

1.00

–

–

1.88

S19

1.04

1.33

0.37

1.56

S20

0.95

0.99

0.63

1.53

S21

0.91

1.02

1.01

2.32

  1. *Represents the mean values of the pollution index of inorganic nitrogen and active phosphate, because only the measured concentrations of inorganic nitrogen and active phosphate exceeded the 4th category seawater quality standard
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