150
Table 5.7 Correlation coefficient between metal concentration in ambient media (water and sediment) with accumulated metal in vegetative parts of Excoecaria
agallocha
in 2013
Combination
r-value
p-value
Premonsoon
Monsoon
Postmonsoon
Premonsoon
Monsoon
Postmonsoon
Root Zn × Dissolved Zn
0.579
0.568
0.557
p < 0.01
p < 0.01
p < 0.01
Root Zn × Sediment Zn
0.579
0.567
0.526
p < 0.01
p < 0.01
p < 0.01
Stem Zn × Dissolved Zn
0.653
0.684
0.665
p < 0.01
p < 0.01
p < 0.01
Stem Zn × Sediment Zn
0.622
0.644
0.614
p < 0.01
p < 0.01
p < 0.01
Leaf Zn × Dissolved Zn
0.628
0.659
0.698
p < 0.01
p < 0.01
p < 0.01
Leaf Zn × Sediment Zn
0.612
0.501
0.570
p < 0.01
p < 0.01
p < 0.01
Root Cu × Dissolved Cu
0.677
0.664
0.675
p < 0.01
p < 0.01
p < 0.01
Root Cu × Sediment Cu
0.722
0.691
0.730
p < 0.01
p < 0.01
p < 0.01
Stem Cu × Dissolved Cu
0.728
0.747
0.708
p < 0.01
p < 0.01
p < 0.01
Stem Cu × Sediment Cu
0.752
0.803
0.785
p < 0.01
p < 0.01
p < 0.01
Leaf Cu × Dissolved Cu
0.666
0.646
0.689
p < 0.01
p < 0.01
p < 0.01
Leaf Cu × Sediment Cu
0.625
0.618
0.703
p < 0.01
p < 0.01
p < 0.01
Root Pb × Dissolved Pb
0.906
0.930
0.921
p < 0.01
p < 0.01
p < 0.01
Root Pb × Sediment Pb
0.858
0.869
0.838
p < 0.01
p < 0.01
p < 0.01
Stem Pb × Dissolved Pb
0.808
0.894
0.827
p < 0.01
p < 0.01
p < 0.01
Stem Pb × Sediment Pb
0.618
0.801
0.704
p < 0.01
p < 0.01
p < 0.01
Leaf Pb × Dissolved Pb
0.701
0.789
0.729
p < 0.01
p < 0.01
p < 0.01
Leaf Pb × Sediment Pb
0.461
0.642
0.593
p < 0.05
p < 0.01
p < 0.01
Root Hg × Dissolved Hg
0.909
0.875
0.888
p < 0.01
p < 0.01
p < 0.01
Root Hg × Sediment Hg
0.608
0.220
0.544
p < 0.01
IS
p < 0.01
Stem Hg × Dissolved Hg
0.706
0.666
0.469
p < 0.01
p < 0.01
p < 0.05
Stem Hg × Sediment Hg
0.573
0.217
0.391
p < 0.01
IS
IS
Leaf Hg × Dissolved Hg
0.854
0.509
0.243
p < 0.01
p < 0.01
IS
Leaf Hg × Sediment Hg
0.766
0.278
0.203
p < 0.01
IS
IS
IS
insignificant
5 Mangroves: A Sink of Heavy Metals