Plankton and Why We Need Them

   Plankton are important for many reasons. One reason plankton are important is because they are the base of oceans food chain. Another reason plankton are important to us are because they produce 70%-80% of the entire world's oxygen which keeps many living things alive. One last reason plankton are important is because a change in the population of planton is the first sign of change in the oceanic ecosystem.
     Plankton also come in different types. Diatoms and dinoflagellates are both photosynthetic protists. Diatoms, however, have silica cell walls and dinoflagellates have flagella.