The Decline of Subantarctic Wildlife

Populations of rockhopper penguins, elephant seals, and grey-headed albatrosses in the subantarctic have declined quite markedly in recent decades.

NIWA seabird ecologist Dr David Thompson describes how scientists have narrowed down the possible causes for one species: the rockhopper penguin. Using stable isotope analyses, they've identified a decline in ocean productivity as the most likely factor, although the underlying causes of this remain unknown. (7:19) 

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