The New Zealand Sub-Antarctic Islands consist of five island groups located in the Pacific sector of the Southern Ocean off the south-eastern coast of New Zealand. Along with the Macquarie Island World Heritage site in Australia, the five islands form the only subantarctic island group in the region. The islands lie between latitudes of 47º and 52º south and include the Snares, Bounty Islands, Antipodes Islands, Auckland Islands and Campbell Islands. Total land area is 76,458 ha. The site includes a marine component extending 12 km from each island group.
Few hours of sunshine and high humidity
The islands lie on the shallow continental shelf and three of the groups are eroded remnants of Pliocene volcanoes. Rivers are short with precipitous streams. The lakes are few and generally shallow and small. Quaternary glaciers have left shallow cirques, moraines and fjords on some islands. Cool equable temperatures, strong westerly winds, a few hours of sunshine and high humidity prevail.With the exception of the Bounty Islands which have no higher plants, the remaining islands together with neighbouring Macquarie Island, constitute a Centre of Plant Diversity and have the richest flora of all the subantarctic islands. The Snares and two of the Auckland Islands are especially important in that their vegetation has not been modified by human or alien species. The terrestrial flora of the islands comprises 233 vascular plants of which 196 are New Zealand Sub-Antarctic Islands (New Zealand) indigenous, six endemic, and 30 are rare. Auckland Islands have the southernmost forests in the region, dominated by a species of myrtle. A particular floral feature of the islands is the 'megaherbs' that contribute to rich and colourful flower gardens.
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