An ecological island is a term used in New Zealand, and increasingly in Australia, to refer to an area of land (not necessarily an actual island) isolated by natural or artificial means from the surrounding land, where a natural micro-habitat exists amidst a larger differing ecosystem. In New Zealand the term is used to refer to one of several types of nationally protected areas.
In artificial ecological islands (also known as mainland islands):
The Chatham Islands (/ˈtʃætəm/ CHAT-əm; Moriori: Rēkohu, lit. 'Misty Sun'; Māori: Wharekauri) are an archipelago in the Pacific Ocean about 800 km (430 nmi) east of New Zealand's South Island, administered as part of New Zealand, and consisting of about 10 islands within an approximate 60 km (30 nmi) radius, the largest of which are Chatham Island and Pitt Island (Rangiauria). They include New Zealand's easternmost point, the Forty-Fours. Some of the islands, formerly cleared for farming, are now preserved as nature reserves to conserve some of the unique flora and fauna.
The islands were uninhabited when the Moriori people arrived around the year 1500 and developed a peaceful way of life. In 1835, members of the Ngāti Mutunga and Ngāti Tama Māori iwi from the North Island of New Zealand invaded the islands and nearly exterminated the Moriori, enslaving the survivors.
View the full Wikipedia page for Chatham Islands