224
Sonneratia apetala
Table 7.2 clearly depicts that S. apetala exhibits maximum mean AGB in the eastern
sector followed by western and central sectors. The stored carbon also exhibits similar trend of the order eastern sector > western sector > central sector (Fig. 7.44).
Avicennia marina
Table 7.3 shows that A. marina exhibits mean AGB in the eastern sector followed by
western and central sectors. The stored carbon also exhibits similar trend as per the
order eastern sector > western sector > central sector (Fig. 7.45).
Avicennia alba
The mean biomass and stored carbon of A. alba trees are of the order central sector > western sector > eastern sector (Table 7.4; Fig. 7.46).
Avicennia officinalis
Table 7.5 depicts that A. officinalis exhibits mean AGB and AGC (Fig. 7.47) as per
the order central sector > western sector > eastern sector.
Excoecaria agallocha
The mean biomass and stored carbon of E. agallocha trees are of the order central
sector > western sector > eastern sector (Table 7.6; Fig. 7.48).
In case of nitrogen, the values are highlighted in Tables 7.7, 7.8, 7.9, 7.10, and
7.11. The spatial order of stored nitrogen (for all the 5 species) matches with that of
the stored carbon, but the percentages of nitrogen are very poor (less than 2.00%)
irrespective of species, age and stations.
Phase 3: Species – Wise Carbon and Nitrogen Sequestration
Potential of Mangroves in Indian Sundarbans
1. The carbon sequestration ranges from 1.874 tonnes ha
−1
yr
−1
(in Goashaba) to
7.835 tonnes ha
−1
yr
−1
(in Arbesi) for S. apetala.
2. The carbon sequestration ranges from 1.605 tonnes ha
−1
yr
−1 (
in Jhila) to 3.349
tonnes ha
−1
yr
−1
(in Pirkhali) for A. marina.
3. The carbon sequestration ranges from 1.785 tonnes ha
−1
yr
−1
(in Harinbhanga)
to 3.549 tonnes ha
−1
yr
−1
(in Pirkhali) for A. alba.
7 Mangroves: Unique Sinks of Carbon and Nitrogen
Sonneratia apetala
Table 7.2 clearly depicts that S. apetala exhibits maximum mean AGB in the eastern
sector followed by western and central sectors. The stored carbon also exhibits similar trend of the order eastern sector > western sector > central sector (Fig. 7.44).
Avicennia marina
Table 7.3 shows that A. marina exhibits mean AGB in the eastern sector followed by
western and central sectors. The stored carbon also exhibits similar trend as per the
order eastern sector > western sector > central sector (Fig. 7.45).
Avicennia alba
The mean biomass and stored carbon of A. alba trees are of the order central sector > western sector > eastern sector (Table 7.4; Fig. 7.46).
Avicennia officinalis
Table 7.5 depicts that A. officinalis exhibits mean AGB and AGC (Fig. 7.47) as per
the order central sector > western sector > eastern sector.
Excoecaria agallocha
The mean biomass and stored carbon of E. agallocha trees are of the order central
sector > western sector > eastern sector (Table 7.6; Fig. 7.48).
In case of nitrogen, the values are highlighted in Tables 7.7, 7.8, 7.9, 7.10, and
7.11. The spatial order of stored nitrogen (for all the 5 species) matches with that of
the stored carbon, but the percentages of nitrogen are very poor (less than 2.00%)
irrespective of species, age and stations.
Phase 3: Species – Wise Carbon and Nitrogen Sequestration
Potential of Mangroves in Indian Sundarbans
1. The carbon sequestration ranges from 1.874 tonnes ha
−1
yr
−1
(in Goashaba) to
7.835 tonnes ha
−1
yr
−1
(in Arbesi) for S. apetala.
2. The carbon sequestration ranges from 1.605 tonnes ha
−1
yr
−1 (
in Jhila) to 3.349
tonnes ha
−1
yr
−1
(in Pirkhali) for A. marina.
3. The carbon sequestration ranges from 1.785 tonnes ha
−1
yr
−1
(in Harinbhanga)
to 3.549 tonnes ha
−1
yr
−1
(in Pirkhali) for A. alba.
7 Mangroves: Unique Sinks of Carbon and Nitrogen