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Home → Science → News

Underwater volcano found off Australian coast may act as superhighway for whales

The chain of seamounts is brimming with underwater life.

Tibi Puiu by Tibi Puiu
October 10, 2018
in Animals, Biology, Discoveries, Environment, Geology, News, Oceanography

Researchres found a chain of underwater volcanoes 400 kilometers (250 miles) east of Tasmania. Credit: CSIRO.
Researchers found a chain of underwater volcanoes 400 kilometers (250 miles) east of Tasmania. Credit: CSIRO.

Completely by chance, researchers have come across a striking underwater chain of volcanoes rising amid the deep ocean. The ancient, extinct volcanoes tower 3 kilometers (1.9 miles) above the ocean floor, but, despite their massive size, they’ve stayed concealed from our prying eyes due to a 2 km-thick (1.2-mile) layer of water.

Researchers think that this diverse landscape is a perfect breeding ground for all sorts of lifeforms, likely hosting an array of yet-undescribed new species. The seamounts may also act as ‘signposts’ on the migratory highway for humpback whales that move from their winter breeding to summer feeding grounds.

These seamounts are likely the geological remnants of the ancient split off between Australia, Australia, and Tasmania, which took place about 30 million years ago.

Australian researchers at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian National University were responsible for the discovery. The team’s research vessel Investigator was busy monitoring nutrient and phytoplankton levels in the East Australian Current when the ship’s sonar detected unusual contours beneath the ocean, 250 miles (400 kilometers) east of Tasmania.

It didn’t take long for the researchers to realize that the submerged mountains were brimming with life. Right as the ship was sailing above the uncharted terrain, the researchers detected a huge spike in phytoplankton activity — the bottom of the food chain that ensures the livelihoods of

“While we were over the chain of seamounts, the ship was visited by large numbers of humpback and long-finned pilot whales,” said Dr. Eric Woehler from BirdLife Tasmania, who was on the Investigator with a team surveying seabirds and marine mammals.

“We estimated that at least 28 individual humpback whales visited us on one day, followed by a pod of 60-80 long-finned pilot whales the next.

“We also saw large numbers of seabirds in the area including four species of albatross and four species of petrel.”

Credit: Wikimedia Commons.
Credit: Wikimedia Commons.

Investigator will return to the region for two more research voyages in November and December. During these times, they will use deep water cameras to film marine life living on the seamounts. They will also collect rock samples in order to gain a better understanding of the region’s geological origin and evolution.

“We expect that these seamounts will be a biological hotspot year round, and the summer visit will give us another opportunity to uncover the mysteries of the marine life they support,” said Dr. Woehler.

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Tags: humpback whaleunderwater volcanowhale

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