Biodiversity of the Blue Zone - Blue Carbon Reservoir of the Blue Planet - page 48

varying salinity produces changes in the marsh —

in the kinds of species and also in their number.
Typically, the fewest species are found in the
hypersaline zone and the greatest numbers of
species are found in the freshwater tidal marsh.
In Indian Sundarbans region, salt marsh grass
Porteresia coarctata

intertidal mud ats of islands located in the high-

saline zone such as Sagar Island (21

fl

° 39 ′ 04 ″ N

and 88 ° 01 ′ 47 ″ E), Gosaba (22 ° 15 ′ 45 ″ N and

88 ° 39 ′ 46 ″ E) and Satjelia Island (22 ° 11 ′ 52 ″ N

and 88 E), where the salinity varies

between 15 and 28 psu (Fig. 2.13 ). In this
mangrove-dominated ecosystem, the species is
the neighbour of mangroves (Fig. 2.14 ) and plays
an important role to maintain stability of the
islands (Mitra and Banerjee 2005 ).

° 50 ′ 43 ″

grows in Nayachar Island

(21 E), where the

salinity of water touches almost 2 psu during
monsoon. Also the species is abundant in the

° 45 ′ 24 ″ N and 88 ° 15 ′ 24 ″

It is the

Fig. 2.13 Location of sampling stations (marked in blue ) in the Indian Sundarbans