Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Heard and McDonald Islands' has mentioned 'Introduced species' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The large populations of marine birds and mammals, combined with a virtual absence of introduced species, provide a unique arena for the maintenance of biological and evolutionary processes. | UNESCO |
| As the only sub-Antarctic islands virtually free of introduced species and with negligible modification by humans, they are a classic example of a sub-Antarctic island group with large populations of marine birds and mammals numbering in the millions, but low species diversity. | UNESCO |