Aug 2, 2010 8:57 PM by Alison Haynes

Gulf diversity threatened even before oil spill

WASHINGTON (AP) - The oceans around Australia boast the greatest
diversity of sea life on the planet, but the now oil-threatened
Gulf of Mexico also ranks in the top five regions for variety of
And even before the spill, the Gulf was already listed as
threatened, according to the latest update of the Census of Marine
Life, released Monday.
Mark Costello of the Leigh Marine Laboratory, University of
Auckland, New Zealand, commented that now it seems the Gulf "is
more threatened than we thought it was."
Regions where variety of life is most endangered tended to be
the more enclosed seas, such as the Mediterranean, Gulf of Mexico,
China's offshore shelves, Baltic Sea and Caribbean, the new study,
done before the oil spill, concluded.
"The sea today is in trouble," said biologist Nancy Knowlton
of the Smithsonian Institution, leader of the Census' coral reef
project. "Its citizens have no vote in any national or
international body, but they are suffering and need to be heard."
Researcher Ron O'Dor added that "there is a huge amount of
diversity under the water. The ocean isn't just this blue sheet of
cellophane that spreads out. The oxygen in every second breath we
take is produced in the ocean. We ignore what is going on in the
ocean at our peril."
The decade-long Census is scheduled to release its final report
in London in October. The latest update was published Monday in the
journal PLoS ONE.
The report disclosed that the Gulf of Mexico, where a battle is
under way to clean up a massive oil spill, ranks fifth among 25
regions around the world for diversity of sea life.
The Gulf has 15,374 different species identified so far. That's
an average of just over 10 different species per square kilometer.
That doesn't mean only 10 animals in an area of about
four-tenths of a square mile; it means 10 different kinds of
Australian waters had the most species at 32,889, closely
followed by Japan with 32,777. Then came China, 22,365, and the
Mediterranean, 16,848.
What sort of things have the census researchers found?
Well, Australia has the dragonfish, a banana-sized creature with
a mouth full of sharp teeth - some even on its tongue. It lives
deep in the ocean, and since it may be a long time between meals,
if it finds something to eat it needs to hang on to it.
In the Gulf of Mexico queen angelfish have been seen hanging out
around oil rigs, while the deep regions sport specialized
The Caribbean has the bearded fireworm and nocturnal brittle
stars, while off South Korea lives the Sargassum fish. It has a
trapdoor-like mouth high on the head, and a "fishing lure" formed
by the first dorsal spine on the snout.
And when it comes to what group of sea creatures have the most
different species, it turns out to be crustaceans, such as shrimp,
crabs and lobster.
Overall, the report said crustaceans make up nearly one-fifth of
the species in the ocean - 19 percent. Close behind at 17 percent
were mollusks such as squid, octopus, clams, snails and slugs. Fish
make 12 percent of ocean species, and it's 10 percent each for
protozoa and algae.
Smaller shares go to segmented worms, sea anemones, corals and
jellyfish, flatworms, starfish, sponges and other creatures.


»Topics in this article

Top Videos

1 2 3 4

Most Popular