Irrawaddy dry forests


The Irrawaddy dry forests is a tropical dry broadleaf forest ecoregion in central Myanmar. The ecoregion occupies portions of the Irrawaddy, Sittaung, and Salween river basins, in areas with less than 800 mm of annual rainfall.

Geography

The Irrawaddy dry forests occupy an area of 34,988 km². The ecoregion consists of several enclaves in the basins of Irrawaddy, upper Sittaung, and lower Salween rivers. The dry forests are bounded by the Irrawaddy moist deciduous forests.

Flora

Dry mixed decidous forest, also called Than Dahat forest, is predominantly teak, with Terminalia oliveri, Senegalia catechu, and Bauhinia racemosa.
Dry deciduous dipterocarp forest, known as Indaing, is an open-canopied woodland with an understory of herbs and grasses. Dipterocarps are predominant, including Dipterocarpus tuberculatus, Shorea siamensis, Shorea obtusa, and Shorea oblongifolia. Trees in the pea family are also present, including species of Afzelia, Pterocarpus, Dalbergia, Xylia, and Sindora. High Indaing is woodland with trees up to 20 meters high. Low Indaing is made up of high shrubs and low trees, and is often the result of repeated cutting and burning of high Indaing.

Fauna

The ecoregion is home several medium-sized and small mammals, including Indian muntjac, Eld's deer, sambar deer, Indian hog deer, Indian jackal, rhesus macaque, western hoolock gibbon, and jungle cat. Larger mammals, including Indian elephant and tiger, have been extirpated from the ecoregion.

Protected areas

A 2017 assessment found that only 167 km², or less than 1%, of the ecoregion is in protected areas. Another 9% is forested but outside of protected areas. Protected areas in the ecoregion include Popa Mountain National Park and Lawkananda Wildlife Sanctuary.