对于赫德岛和麦克唐纳群岛与众不同的保护价值在于，该群岛保留了世界罕见的早期岛屿生态系统，它从未受到过来自本生态系统外的生物影响，也没有受到过人类的影响。
The distinctive conservation value of Heard and McDonald – one of the world's rare pristine island ecosystems – lies in the complete absence of alien plants and animals, as well as human impact.
十年前，这座岛屿的生态系统陷入混乱。
当不同的生态系统出现时，我们可以这样解释：不同的生态系统形成的部分原因是岛屿形成过程的结果。
When varied ecosystems are present, they can be explained as resulting in part from the process that formed the islands.
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