Over twenty distinct species of salmon have been declared threatened or endangered because of decreasing populations caused by clearcutting and logging around streams, human development, decreased water quality, and loss of habitat from dams and water withdrawals.
(Over twenty distinct species of salmon; have been declared; ) (Over twenty distinct species of salmon; endangered; because of decreasing populations) (decreasing populations; caused; by clearcutting and logging around streams)
Over twenty distinct species of salmon Over twenty distinct species of salmon decreasing populations
have been declared endangered caused
because of decreasing populations
by clearcutting and logging around streams