plankton populations
浮游生物的数量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Pseudonitzschia at first accounted for a small fraction of algae and plankton in the water, but soon made up 80 percent of some tank populations.
刚开始这种藻浮游在水里，在水池中并不起眼，但是很快其数量激增到整个水池藻类的80%。
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This allowed the populations of plankton-eating fish to stage a recovery and compete with the jellyfish for the zooplankton.
BBC: NEWS | Science/Nature | Fishing 'destabilises Black Sea'
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