This ecosystem is located in the southwest part of the Sri Lanka. Normally called it as evergreen forest. The elevation extends from sea level to almost 1200 m and uniformly high temperature is the characteristic feature. (Mean Temperature 28o degrees) Mean annual rain fall is 2500 mm - 5000 mm or more during May to August. Relative humidity varies 75% to over 90%. These forest cover 100,000 ha or 8% land area of the wet zone.
The best known tropical rain forest is the Sinharaja forest (covers 11,300 ha) in Sri Lanka reserve, a world Heritage site. Other large reserves within this region are Kanneliya- Dediyagala - Nakiadeniya (11.900 ha) , Bambarabotuwa (5600 ha), Morapitiya - Runakanda (6900 ha) and Gilimale Eratna ( 5000 ha).
The forest shows marked stratification.
Dominance trees are
Dipoterocarpus zeylanicus ( hora)
Dipoterocarpus hispidus ( bu hora)
D. glandulosus ( gorana)
Shorea spp
Doon spp.
The endemic fauna too show high concentrations in the forest. Endemic Fishes, amphibian’s bird and mammals.
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