October 8, 2008

Scientists Record Hundreds Of New Marine Species

Australian scientists reported Wednesday hundreds of new marine species as well as previously uncharted undersea mountains and canyons have been discovered in the depths of the Southern Ocean.

The researchers recorded a total of 274 species of fish, ancient corals, mollusks, crustaceans and sponges new to science which were found in icy waters up to 3,000 meters (9,800 feet) deep among extinct volcanoes.

The government's Commonwealth Scientific and Industrial Research Organization (CSIRO) said the scientists mapped undersea mountains up to 500 meters high and canyons larger than the Grand Canyon for the first time.

Using new sonar and video technology as well as seafloor sampling, the finds were made in marine reserves 100 nautical miles south of the Australian island of Tasmania during two CSIRO voyages in November 2006 and April 2007.

More was known about the surface of Mars than the depths of the world's oceans, CSIRO scientist Kate Wilson said in the Tasmanian capital Hobart.

"In Australian waters, for example, more than 40 percent of the creatures brought to the surface by our scientists on a voyage of discovery have never been seen before," she said.

CSIRO specialist Nic Bax said a total of 123 underwater mountains were found, noting they were home to thousands of deep-sea animals.

"They're really what we call the rainforests of the deep, they provide an area where we get a very wide range of species collected and that's really unique in the deep sea environment," he said.

Bax said in the cold depths of the Southern Ocean "things grow quite slowly so when you're looking at a coral which is maybe two meters high, it may also be 300 years old or more."

"So you end up seeing some very old things down there. You can see corals which probably existed 2,000 years ago down there."

Only a tiny proportion of Australia's oceans had been explored in such a way and they could only speculate on the biodiversity hidden under the water, scientists said.

"We have no idea how many species there are, and most of the species we get we only catch once," Bax said.

"It's an amazing day for Australian science," Environment Minister Peter Garrett said of the discoveries.

"It's extraordinary to think that we've put someone on the moon and we're very familiar with lots of parts of the planet, we've got Google Earth and yet here we are, we've got parts of the planet that have never been sighted or explored before," Garrett said.

The research will help the effort to conserve Australia's ocean biodiversity.

"It'll greatly inform scientists as they deepen their understanding about likely climate change impacts, water currents, and impacts of water temperature on the diversity of species," Garrett said.


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