Phytoplankton in the Great Lakes

October 7, 2011

The Dynamic Great Lakes


Trophic levels are any of the feeding levels that energy passes
through as it continues through the ecosystem. All energy in a living
system originates with the sun.
From sunlight and nutrients dissolved in water, phytoplankton or
algae, produce food. They are called a fountain of energy, for they
multiply rapidly on sunny days producing food to fuel other living
things and release oxygen in a process called photosynthesis. They
form the broad base of the food pyramid in water in the Great Lakes.
excerpted from The Dynamic Great Lakes.
Read more about trophic levels in my book: The Dynamic Great Lakes.


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