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Table 2 The basic input data and biological parameters of groups as estimated by Ecopath for the artificial ecosystem model

From: An ecological model of the artificial ecosystem (northern Hangzhou Bay, China): analysis of ecosystem structure and fishing impacts

Trophic group

Biomass (t km−2)

P/B (year−1)

Q/B (year−1)

EE

GE (P/Q)

Trophic level

Unassimilated consumption

Catch (t km−2)

1 Phytoplankton

14.16

118.2

–

0.194

–

1.00

0.4

–

2 Macrophytes

32.60

7.50

–

0.591

–

1.00

0.4

2.52

3 Herbivorous zooplankton

14.80

86.00

280.00

0.358

0.307

2.00

0.4

–

4 Carnivorous zooplankton

6.00

25.00

89.00

0.891

0.281

2.84

0.3

–

5 Infauna

14.15

4.00

20.00

0.902

0.200

2.44

0.3

–

6 Mollusca

6.82

1.75

14.00

0.376

0.125

3.05

0.2

–

7 Shrimps

3.15

1.84

24.4

0.307

0.075

2.96

0.2

–

8 Crabs

1.50

2.12

8.48

0.492

0.174

3.23

0.2

–

9 Herbivorous fish

2.21

1.32

12.00

0.553

0.110

2.09

0.2

0.40

10 Zooplanktivorous fish

1.25

1.28

7.50

0.779

0.171

3.14

0.2

0.25

11 Benthic-feeding fish

1.21

1.22

5.89

0.501

0.207

3.22

0.2

0.08

12 Piscivorous fish

0.41

0.90

6.00

0.407

0.150

3.90

0.2

0.15

13 Detritus

10.00

–

–

0.440

–

1.00

 

–

  1. Values in italic were estimated by model