How could a thick layer of algae on the surface of a pond affect producers that live on or near the bottom of the pond?

What if you know Atomic number of an atom if you know the number of neutrons? Is it possible to live on the outer planets? When would you use a light microscope instead of an electron microscope? What is the main characteristic that all the noble gases have in common? What color does caesium burn in a flame test? What is the name of the tallest mountain in Indonesia? What four elements are found in food? Is the burg kalifa the worlds tallest skyscaper? If the same base pairs are used to code for all organisms why is there so much variation among organisms? The capacity to do work or produce light is known as? Is the calories of food energy that you consume each day are transferred to cytosine for use as an energy source for cells? Is Greece the same as greek? What are the differences between the UK and Jamaica? What does the first law of heredity describe? Are fungi useful to humans? Is a lead atom heavier than a helium atom? How many valence electrons does bromine Br atomic no equals 35 have? Why is it necessary to block unoccupied binding sites in the microtiter wells in ELISA test? What are three tasks that an oceanographer does daily? What Cells make up the convoluted tubules?

How could a thick layer of algae on the surface of a pond affect producers that live on or near the bottom of the pond?