List of ecoregions in Papua New Guinea

Terrestrial ecoregions

[Tropical and subtropical moist broadleaf forests]

• Admiralty Islands lowland rain forests
• Central Range montane rain forests
• Huon Peninsula montane rain forests
• Louisiade Archipelago rain forests
• New Britain-New Ireland lowland rain forests
• New Britain-New Ireland montane rain forests
• Northern New Guinea lowland rain and freshwater swamp forests
• Northern New Guinea montane rain forests
• Solomon Islands rain forests
• Southeastern Papuan rain forests
• Southern New Guinea freshwater swamp forests
• Southern New Guinea lowland rain forests
• Trobriand Islands rain forests

  [Tropical and [subtropical grasslands, savannas, and shrublands]]

• Trans-Fly savanna and grasslands

  [Montane [grasslands and shrublands]]

• Central Range sub-alpine grasslands

  [Mangrove] ecoregions

• New Guinea mangroves

  Freshwater ecoregions

• Bismark Archipelago
• New Guinea Central Mountains
• New Guinea North Coast
• Papuan Peninsula
• Solomon Islands
• Southwest New Guinea – Trans-Fly Lowland

  Marine ecoregions

Eastern [Coral Triangle]

• Bismarck Sea
• Solomon archipelago
• Solomon Sea
• Southeast Papua New Guinea

  Sahul shelf

• Gulf of Papua
• Arafura Sea