If there is more algae than can be consumed by zooplankton, fish and other organisms, it will ultimately sink to the bottom where it dies and is decomposed by bacteria in a process that depletes the water of oxygen.
(a process; depletes; the water of oxygen) (it; will ultimately sink; to the bottom) (it; dies; ) (it; is decomposed; by bacteria; L:in a process)
a process it it it
depletes will ultimately sink dies is decomposed
the water of oxygen
to the bottom
by bacteria L:in a process