Montane Ecosystems
Montane
Forests
Tropical upper montane rain forests
occupy areas above 1500 m. in the wet zone. This area is characterized
by an average temperatureof less that 16 degrees in the coldest
month of the year and annual average rainfall of about 200 mm without
any regular dry season. Unlike lowland rainforests, montane forests
consist of two tree layers: a canopy and a under storey reaching
around 13 m only. Both these layers contain a dense growth of epiphytes.
The most important
characteristic of this vegetation is that it protects the catchments
of major rivers by minimizing soil erosion through the interception
of rain drops and facilitating infiltration.
These eco-systems
are an integral and essential part in the hill areas in preventing
land slides, which tend to occur often in denuded and eroded slopes.
Montane forest is also characterised by a high degree of endemism
in both flora and fauna as in the case of lowland rain forests.
These forests
are under continuous threat as a result of human settlements and
agriculture due to increasing population pressure and most importantly,
clearing for tea plantations. At present only around 3000 ha of
these forests are intact although in tiny fragmented patches.
Information from Forest
Department
Coordinated by Duminda Sanjeewa Balasooriya
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