The Prince Alexander Mountains are a mountain range in Papua New Guinea

Papua New Guinea

Papua New Guinea , officially the Independent State of Papua New Guinea, is a country in Oceania, occupying the eastern half of the island of New Guinea and numerous offshore islands...

. The range is located on the northern coast of New Guinea

New Guinea

New Guinea is the world's second largest island, after Greenland, covering a land area of 786,000 km2. Located in the southwest Pacific Ocean, it lies geographically to the east of the Malay Archipelago, with which it is sometimes included as part of a greater Indo-Australian Archipelago...

. The Torricelli Mountains

Torricelli Mountains

Torricelli Mountains is a mountain range in Sandaun Province, northwestern Papua New Guinea. The highest peak in the range is Mount Sulen at 1650 meters. The Bewani Mountains are located to the west, and the Prince Alexander Mountains are located to the east...

 lie to the west, and the basin of the Sepik River lies to the south. Mount Turu is a notable peak, located towards the eastern end of the range.

Ecology

The portion of the range above 1000 meters elevation is home to the Northern New Guinea montane rain forests ecoregion

Ecoregion

An ecoregion , sometimes called a bioregion, is an ecologically and geographically defined area that is smaller than an ecozone and larger than an ecosystem. Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural...

, which also extends across portions of the neighboring ranges. The slopes below 1000 meters are part of the Northern New Guinea lowland rain and freshwater swamp forests

Northern New Guinea lowland rain and freshwater swamp forests

The Northern New Guinea lowland rain and freshwater swamp forests is a tropical moist broadleaf forest ecoregion of northern New Guinea.-Setting:...

.