The National Park includes five kinds of ecosystems :
Rain Broad Leaves Forest, Limestone Forest, Littoral Forest, Coral Area
and Shallow Water Area.
The Rain Broad Leaves
Forest area is mostly secondary forest. The average canopy covers 50 –
90%. 494 species belonging to 337 genera of 117 families have been found
in this type of ecosystem. Some endangered species include Cycas
balansae, Radix morindae officinalis, Ardisia sylvestris Pitard, Smilax
glabra, Leopard cat (Prionailurus bengalensis), Indian muntjac
(Muntiacus muntjak), Small Indian civet (Viverricula indica), Large
Indian civet (Viverra zibetha).
The Limestone
Forest area is forest growing in poor soil with particles of limestone
on rocky islands. Some rare animals found there include Serow, Rhesus
macaque.
The Littoral Ecosystem in the park is
small areas surrounding the islands. It has a rather large tidal
variation and is biologically highly diverse with 251 species including
19 species of mangrove, 17 species of seaweed, 29 species of marine
worms, 149 species of molluscs, 22 species of crustaceans and 15 species
of echinoderms.
The Coral area is located from
the water depths of low tide to 10m deep. 409 species have been found
including groupers, sea bass, crabs, snails, abalone and seaweeds.
The
shallow water area covers a large area around the islands, beyond the
tidal area and extending from 1 km to around 4 km. These areas have not
been profoundly researched but 539 species have been found.
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