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Motu One (Marquesan for "Sand Island"; (フランス語:Îlot de Sable)) is the name of a small sandbank with no vegetation located on the western edge of a coral reef. The reef is approximately in diameter and the islet or islets are less than a hectare in surface, rising only a few feet above sea level and changing shape regularly owing to the action of the currents.〔(Status of Coral Reefs in French Polynesia )〕 Motu One is the northernmost of the Marquesas Islands, located about northeast of Eïao and northeast of Hatutu. It is also the only island in the group that is not made of exposed volcanic material, being a calcareous coral reef on a volcanic plug.〔(Status of Coral Reefs in French Polynesia )〕 Motu One is administratively part of the commune (municipality) of Nuku-Hiva, itself in the administrative subdivision of the Marquesas. Although Motu One was reportedly visited by Marquesans, primarily on egg-collecting missions, there is no archaeological evidence that they were ever inhabited. The first Westerners to sight the islet were on the 1813-1814 voyage of the American commander Commodore David Porter, who named it ''Lincoln Island''. Subsequent explorers also called it ''Sand Island''. ==Ecology== Green sea turtles nest on Motu One. There is a large stand of ''Porolithon (Hydrolithon)'' that is unique in French Polynesia.〔(Status of Coral Reefs in French Polynesia )〕 There is as well as a wide variety of pelagic birds nesting in the islets; a subspecies of the Marquesan Reed-warbler, ''Acrocephalus mendanae consobrina'' (Murphy & Mathews, 1928), is found on Motu One.〔(Marquesan Reed-warbler ''(Acrocephalus mendanae)'' )〕 Since 1992, the whole reef and island ecosystem have been protected as the Motu One Reserve.〔(Biodiversité et Conservation en Outre-mer - Polynésie française )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Motu One (Marquesas Islands)」の詳細全文を読む スポンサード リンク
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