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Located
on
the
southeastern
tip
of
the
subcontinent,
the
Gulf
of
Mannar
is
known
to
harbour
over
3,600
species
of
flora
and
fauna,
making
it
one
of
the
richest
coastal
regions
in
Asia.
117
hard
coral
species
have
been
recorded
in
the
Gulf
of
Mannar.
Sea
turtles
are
frequent
visitors
to
the
gulf
as
are
sharks,
dugongs,
and
dolphins.
However,
the
combined
effects
of
47
villages,
with
a
total
population
of
around
50,000
has
meant
that
overharvesting
of
marine
species
has
become
a
problem.
The
decline
of
fish
populations
has
been
accompanied
with
reducing
numbers
of
pearl
oyster,
gorgonian
coral,
and
acorn
worm.
Local
fishermen
rely
on
the
reef
to
feed
their
families,
but
destructive
fishing
methods
combined
with
the
stress
of
pollution
and
coral
mining
have
meant
both
nearshore
and
offshore
catches
have
decreased.
Endangered
species
include
dolphins,
dugongs,
whales
and
sea
cucumbers.
In
1986,
a
group
of
21
islets
lying
off
the
Tamil
Nadu
coast
between
Thoothukudi
and
Dhanushkodi
was
declared
the
Gulf
of
Mannar
Marine
National
Park.
The
park
and
its
10
km
buffer
zone
were
declared
a
Biosphere
Reserve
in
1989.
The
Gulf
of
Mannar
Biosphere
Reserve
covers
an
area
of
10,500
km2
of
ocean,
21
islands
and
the
adjoining
coastline.
The
islets
and
coastal
buffer
zone
include
beaches,
estuaries,
and
tropical
dry
broadleaf
forests,
while
the
marine
environments
include
seaweed
communities,
sea
grass
communities,
coral
reefs,
salt
marshes
and
mangrove
forests.
May
2019,
The
National
Centre
for
Coastal
Research,
an
institute
under
the
Ministry
of
Earth
Sciences,
in
India,
has
a
field
research
station
in
the
Gulf
of
Mannar
region,
have
found
an
alarming
pattern
of
bleaching
in
the
reefs
in
Mandapam,
Kilakarai
and
Palk
Bay.
Researchers
observed
a
pattern
of
bleaching
in
corals
when
the
temperatures
rose
to
between
32
Ā°C
and
36
Ā°C.
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