What Is Responsible for Smaller Shrimp Catches?
ES2206  Seasonal Changes in Chlorophyll Concentration

Living phytoplankton are the main source of chlorophyll in the ocean. The map below shows annual average chlorophyll concentration in micrograms per liter (µg/l) at the surface.

  !   Click the buttons to see chlorophyll concentration for each season. Examine the maps and the color code to interpret how chlorophyll levels changed through the year. Focus on changes in the Gulf of Mexico.

NOAA

6. Describe how concentrations change through the year.

7. Describe any relationship you observe between changes in oxygen levels and changes in nitrate and chlorophyll.


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