High chlorophyll concentrations indicate the presence of tiny plant-like organisms, called phytoplankton. The plants can both nourish and destroy a marine ecosystem. Phytoplankton are a major source of food for many marine animals, but if they overgrow, the decomposition of so much organic material robs the water of oxygen. Satellite images such as this Aqua MODIS image help monitor phytoplankton concentrations in the world’s oceans.
Published Feb 26, 2005
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