NASA picture of Niau Atoll
|Area||33 km2 (13 sq mi) (lagoon)|
20 km2 (8 sq mi) (above water)
|Length||8 km (5 mi)|
|Overseas collectivity||French Polynesia|
|Administrative subdivision||Îles Tuamotu-Gambier|
Niau's lagoon is swampy, hypersaline and entirely enclosed. The narrow strip of land surrounding the lagoon is covered by marsh vegetation. The enclosed lagoon area is 33 km², making the land size at 20 km². The lagoon has an unusual green color.
Niau is one of the few locations where the original Tuamotu tropical moist forest ecosystem (known locally as feo) has been preserved. This mixed broadleaf forest ecosystem has disappeared on almost all other atolls. The forest has been preserved in the central parts of the island. It contains several endemic species of plants and animals.
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