Plankton discoveries vastly increase ocean biodiversity

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A team of scientists will detail their discovery of more than one million new species of plankton during a two-and-a-half-year, 70,000 mile, expedition.

The team from the Tara research vessel, whose mission was to study the impact of climate change on marine ecosystems and biodiversity, say 90% of the species they detected were previously unknown.

Jenny Hill reports.

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