The researchers found the most notable phytoplankton declines in waters near the poles and in the tropics, as well as the open ocean.
研究人员发现，在两极附近的水域和热带地区浮游植物的跌幅最为显著，在开阔的海洋也是如此。
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In this open water, sunlight provides the fuel and various current systems provide nutrients from deeper waters to form blooms that can stretch 100 to 200 kilometers (60 to 120 miles).