Environmental Engineering Reference
In-Depth Information
Fig. 4.14
Spatio-temporal
variations of salinity in the
Indian Sundarbans; each
point is the average of six
stations and three seasons
Table 4.6
ANOVA of hydrological parameters in Indian
Sundarbans
Variable
Table 4.7
ANOVA of AGB and AGC of selected
mangrove species in Indian Sundarbans
Variable
F
F
crit
(
p
< 0.05)
F
F
cal
cal
crit
(
p
< 0.05)
Salinity
Between sectors
AGB
AGC
17,612
2.743
Sonneratia apetala
Between sectors
Between years
0.740
1.705
31.366
23.895
4.102
p
Between sectors
Between stations
1.226
1.232
3.325
0.886
4.102
Avicennia alba
Between sectors
Between stations
0.791
3.325
5.261
5.068
4.102
DO
Between sectors
Between stations
0.440
0.396
3.325
0.697
4.102
Excoecaria
agallocha
Between sectors
Between stations
1.128
3.325
Nitrate
Between sectors
10.311
9.861
4.102
0.552
4.102
Between stations
1.327
1.203
3.325
Between stations
0.106
3.325
Avicennia
of
cinalis
Between sectors
Phosphate
Between sectors
1.922
4.102
5.337
5.166
4.102
Between stations
0.867
3.325
Between stations
0.487
0.453
3.325
Silicate
Between sectors
Avicennia marina
Between sectors
1.288
4.102
5.085
4.971
4.102
Between stations
1.501
3.325
Between stations
0.889
0.840
3.325
Soil organic carbon
Between sectors
0.164
4.102
of the species towards salinity have been con-
Between stations
0.342
3.325
cient values
between the AGB, AGC and salinity of the aquatic
phase surrounding the species (Table
4.8
).
Mangrove plants use C
3
photosynthetic bio-
chemistry. There are several proofs to con
rmed through correlation coef
pH, DO, nitrate, phosphate, silicate and soil
organic carbon through ANOVA and con
rmed
that salinity is the only causative factor regulating
the spatial variations of AGB and AGC
(Table
4.6
). The second important
rm this
statement. Firstly, the leaves lack the anatomical
features (such as bundle sheath cells) character-
istic of
nding points
towards the resilience of
E. agallocha
and vul-
nerability of
S. apetala
to salinity. Such responses
leaves employing C
4
photosynthesis.
