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Scientists Discover New Life Forms In The Arctic Ocean

The picture shows a picobiliphyta cell under a fluorescent microscope. The cell nucleus is coloured in blue, the cytoplasm in green and the plastide, which is responsible for photosynthesis, is coloured in red. The cell measures two by five micrometres. Photo courtesy Fabrice Not/Station Biologique de Roscoff
by Staff Writers
Quebec City, Canada (SPX) Jan 15, 2007
An international team of scientists including Universite Laval biologist Connie Lovejoy has discovered new life forms in the Arctic Ocean. The team's findings are reported in the January 12 edition of the journal Science.

The researchers have discovered a new group of microscopic organisms, which they have baptized "picobiliphytes": pico because of their extremely small size, measured in millionths of a meter, bili because they contain biliproteins, highly fluorescent substances that transform light into biomass, and phyte meaning they are plants.

The discovery came from carefully analyzing DNA sequences belonging to vast communities of micro-organisms living in the ocean. "There was one group of sequences that just didn't line up with any of the known groups," explains Dr. Lovejoy. "In fact, the divergence of this group from known organisms is as great as the difference between land plants and animals," adds the scientist.

Over this last year the team has been scouring data bases, verifying their results and applying new techniques to their samples. They can now confirm that these new life forms are abundantly distributed throughout northern seas. They have yet to be brought into culture, but can be seen using advanced microscopy techniques.

"It's a very exciting discovery," comments Dr. Lovejoy. "The ocean covers 70% of planet earth and we are only now coming to appreciate its rich and complex biodiversity."

The other members of the team responsible for this discovery are Fabrice Not, Khadidja Romari, and Daniel Vaulot from Universite Pierre et Marie Curie (France); Klaus Valentin, Kerstin Tobe, and Linda Medlin from the Alfred Wegener Institute for Polar and Marine Research (Germany); and Ramon Massana from Institut de Ci�ncies del Mar (Spain).

Related Links
Department of biology at Universite Laval
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