Because it’s out of the Caribbean’s hurricane belt,
Bonaire has ducked some major storms over the years. Not
so in October, when Hurricane Omar hit the island. Marine
park staff surveyed the reefs a few days later and reported
a lot of overturned corals, significant silting, and rubble in
shallower areas along the west coast.
Undercurrent readers who visited Bonaire afterwards report
serious damage. “Omar stripped all life down to 25 feet so no
snorkeling left; you have to go below 30 feet to see reef life,”
said Larry Polster (Martinsville, IN), who went in February.
“It also took out most docks. At Town Pier, they had to
scrape the pilings to inspect damage, so the famous night
dive there is gone.” Hal Berson (New York, NY), who visited
last month, had the same observations. “Much of the coral
was dead and most of the fish were juvenile. These were
magnificent reefs but the truth is they will take quite some
time to return.”
The marine park survey stated damage is most evident
on west coast sites and down to 50-foot depths. Shallows in
the dive sites between Sabarieco and 1,000 Steps got the
heaviest impact. The east coast, protected from the westerly
winds, didn’t get any damage. Omar was the biggest storm
to hit since “Wrong Way Lenny,” which moved west to east
across the Caribbean in 1999, but the later storm had more
impact. Omar’s waves were more intense and came in a
west-to-northwest direction instead of the typical southwest
pattern, hitting the reefs directly and devastating some shoreside
buildings.
Dee Scarr, owner of Bonaire dive operation Touching
the Sea, told the Bonaire Reporter that while she saw less coral
damage than expected, divers can help coral most by gently
freeing them of debris, and reporting large obstructions to
the marine park staff for removal. Now the most important
thing to do is dust off the significant amount of silt resting
atop sponges. Because sponges get oxygen and food by pulling
in and filtering seawater, silt layers hinder the process.
For visiting divers who happen to see silty sponges, here’s
Dee’s advice: “First, you must be a skilled enough diver to
avoid making contact with the reef and live coral. Fan with
your hand for best control, but don’t touch the sponge. After
the sponge is cleared of silt, look to see where the silt went.
If it landed on living coral, gently fan it off without making
contact. Be especially cautious when you’re fanning close to
the sand bottom, because the water movement that fans the
sand off the sponge also lifts it off the bottom and on top of
everything around it.”
One upside is Omar may have flushed away the reason
why Bonaire eels were turning up dead since last summer.
Jerry Ligon, resident naturalist at Bonaire Dive & Adventure,
had recorded 50 moray deaths by October, mostly spotted,
green and viper morays. Two marine biologists from the
University of Puerto Rico investigated and concluded the eels
were affected by a bacteria called vibrio. One species of this
genus is the primary agent in human cholera, so it’s a gruesome
bacteria for any creature to be infected with, liquefying
stomach contents and causing abdominal pain and bleeding
in the gastrointestinal tract and, obviously, death. Its presence
in the water is a direct result of untreated sewage.
Luckily, Omar’s heavy surf may have cleared away the
vibrio source, “because since Omar, no more dead eels,”
Ligon reports. On dives in December and January, he saw
mostly juvenile but healthy morays, which indicates to him
that this generation is vibrio-free.
“Omar also cleaned out all the thick reddish algae that
was covering the bottom and sections of coral rubble along
the entire western coast and many sections of Klein Bonaire,”
says Ligon. “This algae was determined to be a death warrant
for Bonaire’s reefs.” To prevent its return, resorts have
been reminded to stop their sewage from accumulating and
overflowing into coastal reefs. Now they are supposed to have
their septic collection systems pumped out and hauled to the
island center by “honey trucks” on a regular schedule, until
Bonaire gets its sewage treatment plant built in 2012.