图7：成群的磷虾是整个南极动物食物链的基础。 它们以浮游生物为食，生长在海冰的上层。
Photo 7 ：Swarms of krill, a cornerstone of the entire Antarctic food chain, feed on phytoplankton that grows on the underside of sea ice.
图7：成群的磷虾是整个南极动物食物链的基础。 它们以浮游生物为食，生长在海冰的上层。
Photo 7 ：Swarms of krill, a cornerstone of the entire Antarctic food chain, feed on phytoplankton that grows on the underside of sea ice.
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