A high-altitude Sri Lankan plateau holds secrets of ancient cultures and modern ecological mysteries.
In short: Perched 2,100 meters above sea level, Horton Plains is a rare cloud forest sanctuary. Once a colonial hunting ground, this biodiversity hotspot now faces unique threats, from mysterious forest dieback to the impact of invasive species, challenging conservationists to protect its delicate balance of endemic plants and endangered primates.
The Horton Plains, known locally as Maha Eliya, sits on a southern plateau within Sri Lanka’s central highlands. While stone tools from the prehistoric Balangoda culture reveal ancient human activity, the area was later renamed during the British colonial era to honor Sir Robert Wilmot-Horton, who served as governor of Ceylon between 1831 and 1837. By the late 19th century, concerns over deforestation led to protective measures, and the region was eventually designated a national park in 1988.
The park is a vital hydrological hub, serving as the headwaters for major rivers including the Mahaweli, Kelani, and Walawe. Its landscape is a complex mosaic of wet grasslands and subtropical montane evergreen forests, home to a high concentration of endemic species. Among its most elusive inhabitants is the Horton Plains slender loris, a primate so rare it was not photographed by researchers until 2010. The park also supports a large population of sambar deer, which often exceed the natural carrying capacity of the plains.
Despite its protected status, the ecosystem faces significant pressures. A persistent phenomenon known as forest dieback, first noted in 1978, has severely impacted vegetation, particularly Calophyllum walkeri trees. Scientists suspect a combination of factors, including soil acidification, nutrient leaching, and increased drought frequency. Furthermore, the introduction of non-native species like rainbow trout and various invasive plants continues to threaten the park's fragile biodiversity. Managing these challenges requires an integrated approach that extends beyond the park's borders to ensure the survival of its unique wildlife, such as the leopard populations that frequently roam outside the designated boundaries.
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- Summary by Intellect · source: Horton Plains National Park
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