虽然安第斯高地的人民参与了这种网络，但他们主要依靠在尽可能多的生态区维持自主的生产力。
Although the peoples of the Andean highlands participated in such networks, they relied primarily on the maintenance of autonomous production forces in as many ecological zones as possible.
在赤道上升流区，浮游植物的生产力很少有季节性变化。
In the equatorial upwelling zone, there is very little seasonal change in phytoplankton productivity.
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