At pH 5.5, bottom-dwelling bacterial decomposers begin to die and leave undecomposed leaf litter and other organic debris to collect on the bottom.
(bottom-dwelling bacterial decomposers; begin; L:At pH 5.5) (bottom-dwelling bacterial decomposers; to die; ) (bottom-dwelling bacterial decomposers; to leave; undecomposed leaf litter and other organic debris)
bottom-dwelling bacterial decomposers bottom-dwelling bacterial decomposers bottom-dwelling bacterial decomposers
begin to die to leave
L:At pH 5.5
undecomposed leaf litter and other organic debris