The Southern New Guinea freshwater swamp forests is a tropical moist forest

ecoregion An ecoregion (ecological region) is an ecological and geographic area that exists on multiple different levels, defined by type, quality, and quantity of environmental resources. Ecoregions cover relatively large areas of land or water, and c ...

in southern

New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; , fossilized , also known as Papua or historically ) is the List of islands by area, world's second-largest island, with an area of . Located in Melanesia in the southwestern Pacific Ocean, the island is ...

. The ecoregion includes the extensive swamp forests of southern and western New Guinea.

Geography

New Guinea is home to extensive swamp forests. These forests are permanently waterlogged or seasonally inundated during the rainy season. The Southern New Guinea freshwater swamp forests extend from the western

Bird's Head Peninsula The Bird's Head Peninsula ( Indonesian: , , meaning Bird's Head in Indonesian and Dutch) or Doberai Peninsula (''Semenanjung Doberai'') is a large peninsula that makes up the northwest portion of the island of New Guinea, comprising the Indones ...

to the

Papuan Peninsula The Papuan Peninsula, also known as the Bird's Tail Peninsula, is a large peninsula in Papua New Guinea, southeast of the city of Lae, that makes up the southeastern portion of the island of New Guinea. The peninsula is the easternmost extent of ...

in the southeast. The forests lie in the lower reaches of the rivers that drain New Guinea's highlands. The most extensive swamp forests are in the basin of the

Fly River The Fly River is the third longest river on the island of New Guinea, after the Sepik and Mamberamo, with a total length of . It is the largest by volume of discharge in Oceania, the largest in the world without a single dam in its catchment, an ...

. The Southern New Guinea lowland rain forests and Vogelkop-Aru lowland rain forests ecoregions occupy the adjacent lowlands. Near the coast the freshwater swamp forests transition to New Guinea mangroves as the waters become brackish or salt.

Climate

The ecoregion has a humid

tropical climate Tropical climate is the first of the five major climate groups in the Köppen climate classification identified with the letter A. Tropical climates are defined by a monthly average temperature of or higher in the coolest month, featuring hot te ...

Flora

The freshwater swamp forests support diverse habitats, from open water to grass swamps of several types (dominated by ''

Leersia ''Leersia'' is a genus of plants in the grass family which includes species known generally as cutgrasses. The genus is widespread across many countries on all the inhabited continents. It was named for the German botanist Johann Daniel Leers ...

'', ''

Saccharum ''Saccharum'' is a genus of tall perennial plants of the broomsedge tribe within the grass family. The genus is widespread across tropical, subtropical, and warm temperate regions in Africa, Eurasia, Australia, the Americas, and assorted ocean ...

Phragmites ''Phragmites'' () is a genus of four species of large perennial plant, perennial reed (plant), reed Poaceae, grasses found in wetlands throughout temperate and tropical regions of the world. Taxonomy The World Checklist of Selected Plant Famili ...

'', '' Pseudoraphis'', or mixed swamps with no dominant plant), swamp savannas (''

Melaleuca ''Melaleuca'' () is a genus of nearly 300 species of plants in the myrtle family, Myrtaceae, commonly known as paperbarks, honey-myrtles, bottlebrushes or tea-trees (although the last name is also applied to species of '' Leptospermum''). They ...

''-dominated or mixed), swamp woodlands (dominated by sago palm (''Metroxylon sagu''), ''

Pandanus ''Pandanus'' is a genus of monocots with about 578 accepted species. They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics. Common names include pandan, screw palm and screw pine. The genus is classified ...

'', or mixed), and swamp forests dominated by '' Campnosperma,

Terminalia Terminalia may refer to: * Terminalia (festival) Terminalia () was an ancient Roman festival in honour of the god Terminus, who presided over boundaries. His statue was merely a stone or post stuck in the ground to distinguish between propert ...

'', or ''Melaleuca''.

Fauna

The ecoregion is home to fifty mammal species, including

marsupial Marsupials are a diverse group of mammals belonging to the infraclass Marsupialia. They are natively found in Australasia, Wallacea, and the Americas. One of marsupials' unique features is their reproductive strategy: the young are born in a r ...

bat Bats are flying mammals of the order Chiroptera (). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out ...

s, and murid rodents. There is one

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

mammal species, the Fly River water rat (''Leptomys signatus''). The ecoregion has 339 species of birds, including resident and

migratory birds Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Migration is inherently risky, due to predation and mortality. The ...

. The ecoregion's lakes and wetlands support large populations of water birds.

Protected areas

A 2017 assessment found that 8,583 km², or 9%, of the ecoregion is in protected areas. Over 80% of the ecoregion has relatively intact vegetation.Eric Dinerstein, David Olson, et al. (2017). An Ecoregion-Based Approach to Protecting Half the Terrestrial Realm, BioScience, Volume 67, Issue 6, June 2017, Pages 534–545; Supplemental material 2 table S1b

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External links

References

{{reflist Australasian ecoregions Ecoregions of Indonesia Ecoregions of New Guinea Ecoregions of Papua New Guinea Tropical and subtropical moist broadleaf forests