Why are phytoplankton so important?
These small plants are the beginning of the food
chain for most of the planet. As phytoplankton
grow and multiply, small fish and other animals
eat them as food. Larger animals then eat
these smaller ones. The ocean fishing
industry finds good fishing spots by
looking at ocean color images to
locate areas rich in phytoplankton.
Phytoplankton, as
revealed by ocean color, frequently show scientists
where ocean currents
provide nutrients for
plant growth.
ln addition, the plants show where pollutants poison the ocean and prevent plant growth, and where subtle changes in the climate-warmer or colder more saline or less saline-affect phytoplankton growth. Since phytoplankton depend upon specific conditions for growth, they frequently become the first indicator of a change in their environment.
SeaWiFS Teacher's Guide and Activities