Table 4.1: Environmental Parameters for all stations

Sampling Stations

Parameters

1

2

3

4

5

6

7

Water depth (m)

1.52

2.00

2.13

2.20

2.31

2.74

2.80

Sand %

82.86

63.05

64.89

71.55

75.59

47.25

61.95

Silt %

1.02

1.52

1.22

0.58

0.33

0.43

0.82

Clay %

4.03

6.95

3.87

4.57

7.78

1.12

5.15

Carbon value %

0.82

0.86

0.76

0.53

0.97

0.38

0.34

Chlorophyll a (mg.g-1)

0.50

0.25

0.28

0.16

0.22

0.14

0.13

 

 

 

Table 4.2 Seagrass values for all stations

Sampling Stations

 

1

2

3

4

5

6

7

Seagrass (dry wt.g.25cm-2)

0.05

0.05

0.04

0.02

0.02

0.00

0.00

Epiphytes (dry wt.g.25cm-2)

0.15

0.08

0.14

0.03

0.01

0.00

0.00

Shoot count (nos. 25cm-2)

190.00

193.00

143.00

109.00

78.00

0.00

0.00

Shoot height (cm)

19.90

18.80

16.50

14.10

16.30

0.00

0.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.3: Density (nos.10cm-2) of meiobenthic taxa.

Sampling Stations

Taxa

1

2

3

4

5

6

7

Mean

SD

%

Nematoda

62

185

552

1174

535

122

326

422.40

382.77

56.41

Harpacticoida

34

58

233

166

96

96

305

140.91

98.66

18.82

Oligochaeta

17

17

113

22

62

24

29

40.46

35.58

5.40

Sipunculida

0

0

0

0

0

0

2

0.34

0.91

0.05

Polycheata

 

 

 

 

 

 

 

 

 

 

Paraonidae

0

0

0

0

0

7

10

2.40

4.16

0.32

Syllidae

48

26

74

94

82

79

82

69.26

23.49

9.25

Others polychaetes

0

12

10

2

0

0

22

6.51

8.28

0.87

Halacarida

5

10

7

2

10

0

2

5.14

3.78

0.69

Turbellaria

14

5

58

113

24

60

65

48.34

37.17

6.46

Bivalvia

0

0

0

0

0

0

2

0.34

0.91

0.05

Ostracoda

0

2

2

0

5

0

10

2.74

3.51

0.37

Amphipoda

0

0

0

0

7

34

0

5.83

12.54

0.78

Gastropoda

5

0

0

0

0

0

0

0.69

1.81

0.09

Crustacean larva

2

0

0

0

0

0

7

1.34

2.65

0.18

Unidentified

0

0

0

0

0

2

12

2.06

4.47

0.27

Total

187

314

1049

1572

821

425

873

748.77

482.60

100.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.4: Density (nos.m‾²) of macrobenthic taxa

Sampling Stations

Taxa

1

2

3

4

5

6

7

Mean

SD

%

Polychaeta

 

 

 

 

 

 

 

 

 

 

Phyllochaetopterus sp

1245

962

509

226

736

0

0

525.57

482.17

15.51

Syllis sp

113

113

0

57

0

113

0

56.60

56.60

1.67

Syllidae sp 1

0

0

0

0

0

0

57

8.09

21.39

0.24

Axiothella sp

170

57

0

0

57

113

0

56.60

65.36

1.67

Capitellidae sp 1

623

849

679

1302

679

396

566

727.71

287.55

21.48

Pulliella sp

57

0

0

0

57

792

0

129.37

293.58

3.82

Streblosoma sp?

57

57

57

57

57

0

0

40.43

27.62

1.19

Pista sp

0

0

0

57

113

0

0

24.26

44.53

0.72

Prionospio sp

57

113

170

170

0

170

226

129.37

78.12

3.82

Podarke sp

0

0

0

57

57

226

0

48.51

82.85

1.43

Nereis sp

0

57

0

57

57

0

0

24.26

30.25

0.72

Glycera sp

0

113

0

0

57

0

57

32.34

44.53

0.95

Phyllodoce sp

0

0

0

0

0

57

0

8.09

21.39

0.24

Cirratulus sp

0

0

0

0

0

509

0

72.77

192.54

2.15

Staurocephalus sp

0

57

0

0

0

0

0

8.09

21.39

0.24

Onuphis sp

0

0

57

0

0

57

0

16.17

27.62

0.48

Oligochaeta

0

0

0

0

0

226

113

48.51

89.07

1.43

Nemertina

0

0

0

113

170

0

170

64.69

82.85

1.91

Crustacea

 

 

 

 

 

 

 

 

 

 

Decapoda

0

57

0

226

226

0

0

72.77

106.96

2.15

Tanaid

0

0

0

0

0

57

0

8.09

21.39

0.24

Isopoda

0

0

0

0

57

0

0

8.09

21.39

0.24

Cumacean

0

0

0

0

0

57

0

8.09

21.39

0.24

Amphipoda

170

170

170

1415

3339

0

0

751.97

1243.79

22.20

Echinodermata

 

 

 

 

 

 

 

 

 

 

Ophiuroidae

736

57

0

283

736

0

0

258.74

340.94

7.64

Asteroidae

0

0

0

0

340

0

0

48.51

128.36

1.43

Sipunculida

 

 

 

 

 

 

 

 

 

 

Sipunculus sp

113

283

0

0

170

0

0

80.86

112.52

2.39

Bivalvia

 

 

 

 

 

 

 

 

 

 

Teredo sp

0

0

0

396

0

0

0

56.60

149.75

1.67

Unidentified Bivalvia

57

57

0

0

57

0

0

24.26

30.25

0.72

Gastropoda

0

0

0

57

170

0

0

32.34

64.18

0.95

Hemichordata

57

0

57

0

0

0

0

16.17

27.62

0.48

Total

3453

3000

1698

4471

7132

2773

1189

3387.91

1975.45

100.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.5: Macrobenthic biomass (wet wt. g.m‾²) of groups

Sampling Stations

Groups

1

2

3

4

5

6

7

Mean

SD

%

Polychaeta

12.19

20.23

10.75

68.87

52.79

2.35

4.59

24.54

25.87

21.66

Sipunculida

135.41

270.82

0.00

0.00

81.43

0.00

0.00

69.67

103.55

61.50

Crustacea

0.18

2.13

0.02

28.42

32.87

0.11

0.00

9.11

14.79

8.04

Gastropoda

0.00

0.00

0.00

0.00

0.17

0.00

0.00

0.02

0.06

0.02

Bivalvia

0.28

0.01

0.00

1.08

0.25

0.00

0.00

0.23

0.39

0.21

Echinodermata

0.23

0.01

0.00

0.00

0.00

0.00

0.00

0.04

0.09

0.03

Others

0.19

18.87

0.22

48.35

0.00

0.06

0.00

9.67

18.44

8.54

Total

148.48

312.08

10.99

146.72

167.50

2.52

4.59

113.27

115.01

100.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.6: Diversity of macrobenthic groups

Stations nos.

S

N

d

J'

1- Lambda'

1

12

61

2.676

0.7499

0.7967

2

14

53

3.274

0.7588

0.8135

3

7

30

1.764

0.7854

0.7517

4

14

79

2.975

0.7442

0.8053

5

18

126

3.515

0.672

0.7506

6

12

49

2.826

0.8475

0.8597

7

6

21

1.642

0.8154

0.7381