So here is a suggestion that the thoughtless introduction of one species has led to the decline and perhaps eventual extinction of at least three others.
(here; is; a suggestion that the thoughtless introduction of one species has led to the decline and perhaps eventual extinction of at least three others) (the thoughtless introduction of one species; has led; to the decline and perhaps eventual extinction of at least three others)
here the thoughtless introduction of one species
is has led
a suggestion that the thoughtless introduction of one species has led to the decline and perhaps eventual extinction of at least three others
to the decline and perhaps eventual extinction of at least three others