Cardamom Hills, Location, Peaks, Biodiversity, Conservation

The Cardamom Hills are also known as Yela Mala. They form an important mountain range in southern India within the Western Ghats. They cover about 2,800 km² and are globally significant for biodiversity and spice cultivation. The hills derive their name from the spice cardamom grown in their cool, moist climate and are part of a UNESCO World Heritage region.

Cardamom Hills Features

The Cardamom Hills exhibit complex geography, climate and economic features shaping their importance in southern India.

• Location: They are Located mainly in Idukki district of Kerala.The hills lie around the continuous mountainous system in southern Western Ghats. 
• Extent: They cover about 2,800 km² of area and connect with Anaimalai, Palani and Pothigai ranges.
• Relief and Elevation: Elevation ranges from 300 to 2,700 metres, with Anamudi at 2,695 metres, the highest peak south of the Himalayas, located in Eravikulam National Park.
• River Systems: The hills form a watershed for west flowing rivers like Periyar, Mullayar and Pamba. These rivers support irrigation, hydropower and ecological systems across Kerala.
• Climate Characteristics: Temperatures range from 15°C in winter to 31°C in summer. Rainfall varies between 2,000 to 3,000 mm in western areas and below 1,500 mm in eastern rain shadow zones.
• Monsoon Influence: The southwest monsoon provides two-thirds of rainfall between June and September, while northeast monsoon and pre-monsoon showers add seasonal precipitation diversity.
• Major Peaks: Important peaks above 2,000 metres include Meesapulimala (2,640 m), Kattumala (2,552 m), Devimala (2,523 m) and Kumarikkal Mala (2,522 m).
• Plantation Economy: The region supports large scale cultivation of cardamom, pepper, tea and coffee, benefiting from humid slopes and fertile soils suited for plantation agriculture.

Cardamom Hills Biodiversity

The Cardamom Hills represent a biodiversity rich ecosystem with endemic species and protected forest zones.

• Forest Types: Tropical evergreen forests dominate mid elevations, while higher regions have montane and shola forests. Lower slopes show semi evergreen and moist deciduous vegetation influenced by rainfall gradients.
• Floral Diversity: Around 392 plant taxa are recorded with dominant species like Persea macrantha, Cullenia exarillata and Palaquium ellipticum. About 56% of tree species are endemic.
• Mammalian Fauna: The region supports over 60 mammal species including Bengal tiger, Indian elephant, gaur, sambar deer and leopard, many facing habitat pressure and conservation concerns.
• Avian and Reptilian Diversity: Around 265 bird species and 45 reptile species are found, including endemic Nilgiri wood pigeon and rare reptiles like the Cardamom Hills earth snake.
• Endemic Species: Species such as lion tailed macaque, Nilgiri tahr, slender loris and purple frog highlight high endemism and ecological uniqueness of the region.

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Cardamom Hills Significance

The Cardamom Hills hold ecological, economic and hydrological importance in southern India.

• Biodiversity Hotspot: As part of the Western Ghats, they fall within one of the world’s major biodiversity hotspots, supporting rare and endemic species with global conservation importance.
• Spice Production Hub: The Cardamom Hill Reserve contributes about 70% of India’s cardamom production, making it a major centre for spice cultivation and export economy.
• Hydrological Importance: Rivers originating here support irrigation, drinking water and hydroelectric projects like Idukki and Mullaperiyar dams, sustaining regional livelihoods.
• Ecotourism: Areas like Periyar attract large scale tourism, including wildlife safaris, trekking and plantation tours, contributing to local economy and conservation awareness.
• Agricultural Diversity: The region produces tea, coffee, pepper, teak and bamboo, creating a diversified plantation economy beyond cardamom cultivation.
• Cultural Importance: Cardamom has culinary, medicinal and religious significance in India, enhancing the socio-cultural value of the region’s agricultural output.
• Strategic Location: Acting as a natural boundary between Kerala and Tamil Nadu, the hills influence climate, vegetation and river systems across both states.

Cardamom Hills Challenges

The Cardamom Hills region faces multiple environmental and administrative challenges due to human activities and climate variability.

• Deforestation: Forest cover declined drastically due to plantation expansion, reducing ecological stability and disrupting natural habitats across the hills over decades.
• Illegal Encroachment: Unauthorized land use, illegal cultivation and land sales in the Cardamom Hill Reserve violate forest laws and accelerate ecological degradation.
• Biodiversity Loss: Intensive farming and habitat fragmentation threaten endemic species, disrupt wildlife corridors and reduce species diversity significantly.
• Soil and Water Degradation: Heavy pesticide use and deforestation lead to soil erosion, reduced fertility and contamination of water bodies affecting ecosystem health.
• Climate Variability: Declining rainfall trends and erratic monsoons have reduced agricultural productivity, including cardamom yields by up to 60% to 70% during drought periods.
• Landslides and Floods: Deforestation and slope instability increase vulnerability to landslips and flash floods, especially in steep terrain regions like Idukki.

Cardamom Hills Conservation

Various conservation initiatives aim to balance ecological protection with sustainable development in the region of Cardamom Hills as highlighted below:

• Protected Areas: The Periyar Tiger Reserve covers 777 km², with a 350 km² core national park, forming the central conservation zone of the hills.
• Protected Area Network: The Periyar Tiger Reserve and adjoining forest divisions like Ranni, Konni and Achankovil protect large contiguous forest areas and wildlife habitats.
• Cardamom Hill Reserve(CHR): Declared under Travancore in 1897, CHR spans about 334 sq miles and serves as a regulated zone for cultivation and forest conservation.
• Community Based Conservation: Participatory Forest Management programs involve local communities in afforestation, watershed protection and monitoring illegal activities.
• Wildlife Protection: Conservation focuses on species like tiger, elephant, Nilgiri tahr and hornbill through habitat restoration and anti poaching measures.
• Ecological Corridors: The hills act as wildlife corridors linking Anaimalai and Palani ranges, ensuring species movement and genetic diversity conservation.
• Legal Interventions: The Supreme Court appointed committees have highlighted violations in CHR and recommended strict enforcement of Forest (Conservation) Act 1980 to prevent further degradation.