Posted: June 5, 2012 by Wildcat in Uncategorized
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Many phytoplankton share a common feature with their larger non-aquatic cousins, the land plants: chloroplasts. Therefore they are also united in their ability to photosynthesize and their environmental requirement of sunlight. Phytoplankton occupy the surface waters of our oceans where sunlight can penetrate. They account for more photosynthesis, carbon dioxide fixation and oxygen production than all the worlds rainforests combined. As the primary producers of the oceans they provide the basis of the oceanic food chain and have contributed to the evolution of the largest living creatures on earth. Phytoplankton feed zooplankton and these minute organisms in their billions make up the diets of hundred ton whales, alongside other filter feeders. Many predatory fish such as mackerel and tuna feed upon these filter feeders, which we humans in turn enjoy. (via The Enormous Influence of Microscopic Marine Plants – AoB Blog)

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