If temperatures had dropped below freezing when I was gone last week, the impatiens in my garden would have died  If the impatiens had died, they obviously could not continue to bloom
However, since the impatiens in my garden are still in bloom today, temperatures did not drop below freezing last week
If a species is highly adaptable, it will thrive when introduced into a new environment. If a species thrives in its new environment, it will have an adverse effect on species already existing in that environment. But, since this species has not had an adverse effect on any species already existing in its new environment, it is not highly adaptable.