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Sri Lanka montane rain forests


The Sri Lanka montane rain forests are an ecoregion found above 1000 m in the central highlands of Sri Lanka. Owing to their rich biodiversity, this region considered a super-hotspot within the endemism hotspot of global importance. These forests are cooler than lowland forests and therefore they have ideal conditions for growth of cloud forests. Half of Sri Lanka's endemic flowering plants and 51 percent of the endemic vertebrates are restricted to these forests. More than 34 percent of Sri Lanka's endemic trees, shrubs, and herbs can only be found in this ecoregion. Twisted, stunted trees are a common sight in these forests, together with many varieties of orchids, mosses and ferns. The trees of montane rain forests grow to a height 10–15 meters, shorter than the lowland rain forest trees. These high altitude forests are the catchment area for most of Sri Lanka's major rivers.

Sri Lanka's montane forests are located above 1220 m. The montane rain forests cover 3099.5 ha in total, or 0.05 percent of Sri Lanka's total area. These forests are found in the mountain tops, such as Pidurutalagala, Kikilimana, Meepilimana, Agrabopaththalawa, Adam's Peak and Hakgala. In lower elevations, at altitudes ranging 1000–1500 m, submontane forests occur; those forests account for 1.04 percent of the nation's area, totalling 65,793.3 ha.

Sri Lanka detached from the Deccan peninsula during the end of the Miocene epoch, but its origin lies within Gondwanaland. According to biogeographic patterns southwestern lowland wet forests became isolated from the nearest wet forests in the mainland soon after the separation when climatic changes created drier, warmer conditions in the lowland. Although the two lands bridged in the subsequently, intervening dry habitat prevented the exchange of wet climate adapted species with wet forests in India. This resulted in southwestern species to evolve and specialize separately, giving rise higher to the higher level of endemism that can be seen today.


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