Anamalai Hills

Anamalai Hills
Name	Anamalai Hills
Other name	Anaimalai Hills
Country	India
State	Kerala; Tamil Nadu
Highest	Anamudi
Elevation m	2695
Range	Western Ghats
Coordinates	10°13′N 76°51′E

Anamalai Hills are a range of mountains in the southern Western Ghats straddling the states of Kerala and Tamil Nadu in India. The hills form a key ecological and hydrological block linking Periyar Tiger Reserve to Eravikulam National Park and influencing river systems such as the Noyyal River and the Amaravathi River. They contain a mosaic of montane shola forests, grasslands, and plantations that support endemic flora and fauna, and host communities including Malayarayan and Muthuvar peoples.

Geography and Geology

The range lies within the Western Ghats near the Nilgiri complex and includes peaks such as Anamudi and ranges contiguous with Anaimalai Hills Wildlife Sanctuary and High Range (Kerala). Geologically the hills are composed of Precambrian charnockite and gneiss formations associated with the South Indian Shield and the Deccan Traps influence further north, producing lateritic soils that influence vegetation zonation. Tectonic uplift linked to the Indian Plate history and the Colachel earthquake-era adjustments shaped ridgelines; erosion by tributaries of the Cauvery River and Periyar River carved valleys and created escarpments analogous to those in the Nilgiri Biosphere Reserve. Important passes connect to Palakkad Gap and routes historically used by traders to Madurai and Coimbatore.

Ecology and Biodiversity

The hills form part of the Western Ghats biodiversity hotspot and support species also found in Silent Valley National Park, Bandipur National Park, and Kudremukh National Park. Vegetation includes montane shola forests and grasslands comparable to Eravikulam and Mukurthi National Park, with endemic plants related to genera in Dipterocarpaceae, Rubiaceae, and Myrtaceae. Fauna includes large mammals recorded in surveys alongside Asian elephant, tiger, Indian leopard, and gaur, as well as endemic small mammals akin to species from Nilgiri tahr studies and rodents documented in Nilgiri biosphere research. Avifauna overlaps with records from Annaimala-adjacent sites and includes species also reported in Silent Valley and Kalakkad Mundanthurai Tiger Reserve; herpetofauna shows endemism comparable to those in Wayanad and Agasthyamalai. Invertebrate diversity mirrors findings from Karnataka Western Ghats and includes pollinators significant to adjacent Cardamom Hills agroecosystems.

Climate and Hydrology

Monsoon-driven precipitation from the Southwest Monsoon and Northeast Monsoon feeds catchments that supply the Bhavani River, Amaravathi Dam, and irrigation systems serving Coimbatore and Pollachi. Elevational gradients produce temperate montane climates similar to Ooty and Munnar, with orographic rainfall influencing cloud forests studied alongside Kodaikanal microclimates. Hydrologically the hills contribute to reservoirs and hydroelectric schemes connected to Parambikulam-Aliyar Project and to perennial streams supporting wetlands comparable to those in Vellayani Lake and Kolleru Lake basins.

Human History and Culture

The region has been occupied by indigenous groups such as Malayarayan and Muthuvar whose cultural practices resonate with those recorded among communities in Palani Hills and Coonoor. Colonial-era developments include British Raj plantations of tea, coffee, and rubber established by entrepreneurs linked to Madras Presidency networks and by firms that also operated in Nilgiri estates and High Range tea gardens. Trade routes connected to Madurai and Coimbatore facilitated cultural exchange with temples in Palani and markets in Pollachi, while missionary and forestry institutions from the Imperial Forest Service era influenced land management. Contemporary cultural festivals and artisanal traditions show continuity with practices documented in Idukki and Theni districts.

Conservation and Protected Areas

Protected areas include reserves contiguous with Periyar Tiger Reserve, Anamalai Tiger Reserve, and landscape corridors linking to Eravikulam National Park and Silent Valley National Park. Conservation efforts involve collaborations between Wildlife Institute of India, Zoological Survey of India, and non-governmental groups active in the Western Ghats conservation network, echoing programs also run in Sundarbans and Nagarhole National Park. Threats from invasive species, plantation expansion, and infrastructure projects have prompted environmental impact assessments similar to those conducted for the Bhavani Sagar Dam and debates paralleling litigation seen in T.N. Godavarman Thirumulpad cases. Community-based conservation models have been trialed drawing on experiences from Vulture Conservation Breeding Centre initiatives and landscape planning with agencies such as the Ministry of Environment, Forest and Climate Change.

Economy and Land Use

Land use is a mosaic of protected forest, government-managed plantations, private estates of tea and coffee, and smallholder agriculture producing cardamom, pepper, and tapioca for markets in Coimbatore and Thrissur. Timber extraction history links to colonial-era companies and contemporary supply chains serving furniture industries in Kochi and Tiruppur. Hydroelectric and irrigation infrastructure adjacent to the hills supports textile and agro-industrial centers in Coimbatore and Madurai while eco-tourism, trekking, and wildlife tourism attract visitors to sites promoted alongside Munnar and Ooty circuits. Conservation-economy conflicts echo land-rights disputes addressed in tribunals and policy forums involving stakeholders such as state forest departments of Kerala and Tamil Nadu.

Category:Mountain ranges of India