69
Table 3.3 Survival percentage of mangrove species in Indian Sundarbans (mean of 10 quadrats/station) in the study area
Species
No./100 m
2
Stn. 1
Stn. 2
Stn. 3
Stn. 4
Stn. 5
avg
Stn. 6
Stn. 7
Stn. 8
Stn. 9
Stn. 10
Avg
Sonneratia apetala
58.82
78.57
37.50
83.33
68.42
65.33
14.29
71.43
25.00
42.86
80.00
46.72
Avicennia marina
55.56
50.00
42.86
50.00
33.33
46.35
87.50
66.67
66.67
70.00
55.56
69.28
Excoecaria agallocha
50.00
22.22
33.33
36.36
30.00
34.38
55.56
62.50
50.00
60.00
55.56
56.72
Avicennia alba
54.55
50.00
55.56
66.67
50.00
55.36
100.00
72.73
70.00
60.00
85.71
77.69
Avicennia officinalis
50.00
54.55
58.33
46.15
38.46
49.50
66.67
63.64
66.67
88.89
80.00
73.17
Acanthus ilicifolius
57.14
33.33
40.00
33.33
62.50
45.26
90.00
42.86
37.50
44.44
25.00
47.96
Aegiceros corniculatum
50.00
40.00
60.00
50.00
80.00
56.00
42.86
25.00
ab
ab
40.00
35.95
Bruguiera gymnorrhiza
57.14
71.43
75.00
80.00
66.66
70.05
14.29
25.00
14.29
20.00
16.67
18.05
Xylocarpus granatum
66.67
66.67
50.00
100.00
100.00
76.67
ab
25.00
20.00
ab
33.33
26.11
Nypa fruticans
ab
ab
0.00
75.00
100.00
58.33
ab
50.00
20.00
ab
50.00
40.00
Phoenix paludosa
ab
ab
ab
50.00
40.00
45.00
20.00
85.71
71.43
80.00
75.00
66.43
Ceriops decandra
ab
ab
ab
ab
ab
ab
20.00
50.00
40.00
60.00
33.33
40.67
Rhizophora mucronata
ab
ab
50.00
33.33
50.00
44.44
ab
100.00
66.67
100.00
75.00
85.42
Heritiera fomes
37.50
ab
ab
28.57
20.00
28.69
ab
20.00
ab
ab
22.22
21.11
Aegialitis rotundifolia
ab
ab
33.33
42.86
25.00
33.73
ab
60.00
40.00
60.00
33.33
48.33
Derris trifoliate
100.00
ab
ab
40.00
25.00
55.00
ab
20.00
ab
ab
33.33
26.67
‘ab’ means absent; study conducted by the present author during 2018
3 Mangroves: A Barrier Against Erosion