132
40.59 ± 2.08 ppm dry wt. (at Bagmara) during premonsoon to 116.11 ± 4.17 ppm
dry wt. (at Kakdwip) during monsoon in root, 30.16 ± 2.24 ppm dry wt. (at Bagmara)
during premonsoon to 100.42 ± 6.17 ppm dry wt. (at Kakdwip) during monsoon in
stem and 22.87  ±  2.07  ppm dry wt. (at Bagmara) during premonsoon to
59.00 ± 4.08 ppm dry wt. (at Chemaguri) in leaf. For Cu, the values in root, stem
and leaf ranged from 24.00 ± 0.71 ppm dry wt. (at Bagmara) during premonsoon to
47.35 ± 2.34 ppm dry wt. (at Kakdwip) during monsoon in root, 21.44 ± 2.64 ppm
dry wt. (at Bagmara) during premonsoon to 39.93 ± 1.57 ppm dry wt. (at Kakdwip)
during monsoon in stem and 19.00 ± 1.34 ppm dry wt. (at Bagmara) during premonsoon to 32.85 ± 3.01 ppm dry wt. (at Kakdwip) in leaf of A. officinalis. In 2014, for
Kakdwip
Harinbari
Chemaguri
Sagar south
Lothian island
Jambu island
Frasergunj
Gosaba
Chotomollakhali
Bali island
Sajnekhali
Bagmara
Concentration of Cu (ppm dry wt.)
Root Premonsoon
Stem Premonsoon
Leaf Premonsoon
Leaf Monsoon
Stem Postmonsoon
Leaf Postmonsoon
Stem Monsoon
Root Postmonsoon
Root Monsoon
45
35
25
15
5
0
10
20
30
40
50
Fig. 5.28 Spatio-temporal variations of Cu (in ppm dry wt) in the vegetative parts of Avicennia
marina during 2014
Kakdwip
Harinbari
Chemaguri
Sagar south
Lothian island
Jambu island
Frasergunj
Gosaba
Chotomollakhali
Bali island
Sajnekhali
Bagmara
Concentration of Cu (ppm dry wt.)
Root Premonsoon
Stem Premonsoon
Leaf Premonsoon
Leaf Monsoon
Stem Postmonsoon
Leaf Postmonsoon
Stem Monsoon
Root Postmonsoon
Root Monsoon
45
35
25
15
5
0
10
20
30
40
Fig. 5.27 Spatio-temporal variations of Cu (in ppm dry wt) in the vegetative parts of Avicennia
marina during 2013
5 Mangroves: A Sink of Heavy Metals