Now you will examine the biodiversity crisis using the Hawaiian Islands as a case study. This archipelago is geographically diverse in size, elevation, and habitat type and is historically rich in biodiversity.
Hawaii's variety of plants and animals is an example of how isolation can lead to the emergence of new
species. This has produced many very specialized species, most of which are endemic, meaning they are
found nowhere else on Earth. Though there is a variety of species, these species are particularly
vulnerable to the effects of introduced species, habitat loss and fragmentation.
What does the article mean by "these species are particularly vulnerable"?