Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Redwood National and State Parks' has mentioned 'Exotic species' in the following places:
Occurrence Sentence Text Source
Currently, there are over 200 exotic species known to live in Redwood National and State Parks.
Exotic species currently account for about a quarter of the total flora in the parks.
Only about one percent of plant growth in old-growth areas are of exotic species, while areas such as the Bald Hills prairies have a relative cover of fifty to seventy-five percent exotic.
Prescribed controlled fires are currently part of the fire management plan and helps to eliminate exotic species of plants and allows a more fertile and natural ecosystem.