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Reef
Check and the Quiksilver Crossing take
the pulse of the world's coral reefs.
What is the
health of the world's coral reefs?
Reef Check, with the help of the
Quiksilver Crossing, is on a
mission to find out. During 2003,
Reef Check teams conducted a
record number of surveys (700), at
450 reef sites around the world
using identical procedures. The
results of these surveys have
provided the most up-to-date gauge
of coral reef ecosystem health and
the extent to which people have
impacted reefs around the world.
On a global scale, coral reefs are
still in critical condition.
Decades of injury by people, who
have removed too many reef
components and added pollution to
coastal marine habitats, have
taken their toll on the vital
functions of reef ecosystems.
Based on seven years of data
collection, Reef Check has
identified ecosystem performance
levels for the major reef regions
of the world. In 2003, Reef
Check's global network of reef
monitors found only 1 in 20
surveys had a key reef health
indicator at an ideal level. The
majority of reefs surveys found
lower than expected numbers of
fish and invertebrates. Marine
management strategies that protect
particular reefs from over-harvest
and pollution have been effective
at minimizing damage by people and
have nursed some areas back to
health. However, economic
realities in tropical countries
have often caused these strategies
to be ignored and to be difficult
to enforce.
Pacific Ocean
Reef sites surveyed in the Pacific
Ocean that are remote from large
human populations, like those
visited by The Indies Trader, were
expected to have the best reef
health indicators. While in
general this was found to be the
case, the reach of fishing fleets
and global climate extremes have
made their mark even on these
ecosystems that were once
protected by their isolation. By
taking Reef Check scientists to
these remote reef areas to gather
this kind of data, The Crossing is
helping to bring attention to how
widespread coral reef decline has
become, and is helping to identify
reefs in the best condition that
need to be protected from further
decline. |



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Indian Ocean
In 1998, high ocean temperatures damaged
a large proportion of the Indian Ocean's
coral populations. This damage resulted
from high temperature forcing corals to
lose the algae that normally live inside
their tissue. This "bleaching"
event was the most severe in recorded
history. While some corals were able to
survive this devastating event, its
effects were still evident in 2003.
Surveys on East African reefs found
living coral colonies on reef surfaces
were still low in number and dead coral
rubble dominated some sites. Government
authorities have put some of these reefs
in "intensive care" and these
conservation efforts have helped to keep
fish numbers relatively high, even where
the amount of living coral is relatively
small. In spite of these efforts, Reef
Check's scientists found that pollution
and heavy tourist use of these reefs
still threaten their recovery.

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Atlantic Ocean
The reefs of the Atlantic and Caribbean
have been under pressure from human
populations for centuries. While the
diversity of coral reef communities is
naturally lower in the Caribbean
compared to the Pacific and Indian
Oceans, over-fishing set the region up
for an unprecedented decline in the
early 1980's. Unusually large numbers of
grazing sea urchins had become vital to
keeping the coral smothering algae at
bay. Fish with this role were low in
number, but fish predators of the
urchins had also been removed and
resulted in increased urchin numbers. In
1983, a disease spread throughout the
entire Caribbean and killed nearly all
of the sea urchins. This loss of the
urchins, combined with continued heavy
exploitation pressure on fish
populations and subsequent new disease
outbreaks (this time in corals), drove
many reef ecosystems in the Caribbean to
the brink of collapse. Determined
actions by governments, organizations
and individuals since the 1980's have
focus attention on the plight of the
region's reefs and on the adoption of
restoration methods to help bring the
ecosystems back to health. While these
efforts have improved the condition of
many reefs, Reef Check surveys in 2003
gave coral reefs in the Caribbean
overall poor marks. This does not mean
that healthy, beautiful coral reefs do
not exist in the Caribbean, they do.
However, it does mean reefs in this
region are particularly vulnerable to
further declines. One encouraging sign
is the reappearance of sea urchins in
some locations and a rapid parallel
recovery of coral populations where
urchins occur in large numbers. If this
trend continues, Caribbean coral reefs
may be given a reprieve, as long as we
maintain our stewardship of these, as
well as all the world's coral reefs |
Reef Check is a global network of
dedicated and enthusiastic individuals
who give their time and effort because
they are committed to helping the plight
of coral reefs. Those taking part in and
supporting the Quiksilver Crossing are
vital elements in this network. Reef
Check and coral reefs thank them all. Go
to Reef Check's website (www.ReefCheck.org)
and the organizations online newsletter,
The Transect Line, to see and read more
about Reef Check's recent
accomplishments and upcoming events.
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