|
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 |