The early bloom period and the ability to withstand competition have helped the New England occurrences survive, but, as their habitats become more forested, some thinning of the tree cover will probably be needed to help these plants thrive.
(The early bloom period and the ability; have helped; the New England occurrences survive) Context(The early bloom period and the ability have helped,List([0, 75))):(the New England occurrences; survive; ) (their habitats; become; more forested) (some thinning of the tree cover; will probably be needed; to help these plants thrive)
The early bloom period and the ability have helped,List([0, 75))
The early bloom period and the ability the New England occurrences their habitats some thinning of the tree cover
have helped survive become will probably be needed
the New England occurrences survive
more forested
to help these plants thrive