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green pages newsletter of the department of environment & coastal resources
COURTESY TURKS & CAICOS REEF FUND
The cause of this disease is suspected to be bacterial.
The troublesome thing about bacterial diseases is that
they can be easily transferred from one area to another
via currents, marine life and even by divers picking up the
disease’s causative agent on their dive gear and spreading
it by using that same gear on other sites where the
disease has possibly not yet been observed.
SCTLD first appeared in TCI waters in January 2019
on the reefs of South Caicos. Then in May 2019 it was
found on the southern reefs off the coast of West Caicos
and within six weeks it had spread to the reefs covering
the entire length of West Caicos. The disease has moved
eastward and has been observed on the Northwest Point
reefs and even in Grace Bay. In November 2019, SCTLD
was confirmed on the reefs off the coast of Grand Turk.
The “sort of” good news is that the extremely high
water temperatures observed on TCI’s reefs this past
summer appears to have slowed the progression of the
disease. This is only “sort of” good news as the high water
temperatures caused a major bleaching event, putting a
new stress on the same corals that are susceptible to
SCTLD. Many corals will recover from bleaching and many
appear to be doing so as cooler water temperatures have
returned. But the cooling water is bringing SCTLD back to
life.
Since August 2019, Turks & Caicos Reef Fund (TCRF)
staff and the Department of Environment & Coastal
Resources (DECR) have been monitoring the spread and
progression of the disease on West Caicos, Northwest
Point, Grace Bay and all the way to Pine Cay. Although the
disease outbreak on South Caicos and West Caicos has
been severe, other reefs around Providenciales and Pine
Cay appear to have only minor infections at the present
time. So NOW is the time to act to do something about
SCTLD and prevent severe damage to our valuable and
important coral reefs.
At right: These are the symptoms of Stony Coral Tissue Loss Disease.
It affects 20 species of corals that create much of the structure of
TCI’s coral reefs, including brain corals, pillar corals and boulder corals.
Once a stony coral dies, the structure of the reef begins to decline.
Times of the Islands Spring 2020 31