在之前的20世纪90年代，这个种类的浮游植物只在夏季水华中偶然现身，大多与低氧水体上涌现象同时发生。

Prior to the late 1990s, this type of phytoplankton showed up only sporadically during summer blooms, usually in conjunction with the upwelling of low-oxygen waters.

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反之，在夏季，色彩到处都是，从金色的阳光到翠绿的植物，或者植物的背景。

Conversely, in summer, colour is just about everywhere, from golden light to verdant green or floral backdrops.

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相比之下，亚热带海洋的浮游植物的种群数量在夏季回落。

In the subtropical oceans, by contrast, phytoplankton populations drop off in summer.

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