New Guinea Highlands

The New Guinea Highlands, also called the Central Range or Central Cordillera, is a long chain of mountain ranges on the island of New Guinea. It includes the highest peak on the island, Puncak Jaya, which stands at 16,024 feet. This makes it the tallest mountain in Oceania.

Many river valleys lie between these mountains, and they help people grow food and live comfortably. The highlands stretch from east to west across the whole island. The island is divided into two countries: Indonesia to the west and Papua New Guinea to the east.

The mountains begin at the Weyland Mountains near Wondama Bay Regency and continue all the way to the Milne Bay Province in the east. This area is important because it shapes the land and helps people live there.

Geography

The Central Cordillera is a chain of mountains with some peaks covered in ice. It includes the Central Highlands and Eastern Highlands of Papua New Guinea, the Owen Stanley Range with its highest point Mount Victoria, and the Bismarck Range with Mount Wilhelm as its highest peak. Other ranges include the Star Mountains on the border of Papua New Guinea and Indonesia, and the Maoke Mountains in Indonesia, home to Puncak Jaya, the highest peak in Oceania.

Many valleys in these mountains are used for farming and have villages where people live. Important towns in the highlands include Mount Hagen, Goroka, and Tabubil. The region is also where several major rivers, like the Sepik River and Fly River, begin.

Geology

The New Guinea Highlands keep growing because the Australian Plate is pushing into other plates. This movement causes earthquakes. The mountains are made from changed rocks that came from deep inside the Earth. These rocks were once ocean sediments and were pushed up and folded millions of years ago. There are also old volcanoes in the highlands, like Mount Hagen and Mount Giluwe.

History

The Highlands have been home to people for a very long time. Artifacts found in the Ivane Valley show that people lived there about 50,000 years ago. These early people moved around and looked for food, but about 10,000 years ago, they began to farm.

Before a new food called the sweet potato was introduced, people in different areas had different ways of living. In the Eastern Highlands, men hunted and farmed while women gathered food and took care of crops. In the Western Highlands, women grew a lot of taro, and men took care of animals and traded with others. The sweet potato changed things because it could be used to feed pigs without cooking. This allowed people to raise many pigs quickly, which became important for trading with nearby groups.

Western explorers first visited the Highlands in the 1930s. During World War II, important battles happened in the eastern highlands. Different groups of people in the Highlands have also had long histories of having difficulties with one another.

Ecology

The New Guinea Highlands have many different plants and animals, special to this area. They are different from the lowlands around them. These mountain areas have forests and grasslands, each with unique wildlife. Some animals and plants live only on certain mountains.

The montane rain forests grow between 1,000 to 3,000 meters. These forests change with height. Lower forests have trees like Castanopsis and Lithocarpus. Higher up, moss-covered trees like Nothofagus grow. The highest forests have thin trees and bushes.

These forests are home to many special animals, including birds and mammals found nowhere else. Some animals are in danger because of logging and road building. About 20% of these forests are protected, mostly in Indonesia, including Lorentz National Park.

Above 3,000 meters, the landscape changes to grasslands with special plants like Rhododendron and Cyathea. Fewer animals live here, but some are unique to this area. These grasslands are mostly protected and in good condition, though more people are visiting them.

Main article: Central Range montane rain forests

Main article: Central Range sub-alpine grasslands

Protected areas

The New Guinea Highlands have several special places where nature is protected. Some of these places include Enarotali Nature Reserve, Jimi (Ruti) Valley National Park, Lake Kutubu Wildlife Management Area, Lorentz National Park, Memberamo Foja Wildlife Reserve, Mount Wilhelm National Park, and Weyland Mountains (Pegunungan Wayland) Nature Reserve. These areas help keep the beautiful landscapes and wildlife safe for everyone to enjoy.