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Radio Australia: Australian scientists in Hobart are researching one of the smallest marine animals to find out what impact climate change is having on the southern ocean. Linda Hunt reports, krill play an important role in the food web of the Antarctic ecosystem. "The shrimp-like crustacean is abundant in Antarctic waters and it's an important food source, not only for whales, but seals, penguins and fish. Dr Andrew Constable from the Australian Antarctic Division is researching krill and ...