Forest Distribution in India

The official assessment of forest resources in India is conducted biennially by the Forest Survey of India (FSI), an organization under the Ministry of Environment, Forest and Climate Change (MoEFCC). The India State of Forest Report (ISFR) utilizes remote sensing data to categorize land cover based on canopy density.

• Very Dense Forest (VDF): All lands with tree canopy density of 70% and above.
• Moderately Dense Forest (MDF): All lands with tree canopy density of 40% and more but less than 70%.
• Open Forest (OF): All lands with tree canopy density of 10% and more but less than 40%.
• Scrub: Degraded forest lands with canopy density less than 10%.
• Non-Forest: Lands not included in any of the above classes.

Legal Classification of Forests

Forests in India are legally categorized under the Indian Forest Act, 1927, which determines the degree of state protection and community rights.

• Reserved Forests: The most restricted category where all activities like grazing and hunting are prohibited unless explicit permission is granted by the state government.
• Protected Forests: The state retains ownership, but local communities are permitted to exercise rights such as fuel-wood collection and timber harvesting for personal use, provided they do not cause structural damage.
• Unclassed Forests: Consist of areas that are recorded as forest land but are not classified as reserved or protected. These are largely managed by local communities or clans, particularly in Northeast India.

Key Macro-Statistics for Forest Cover

The geographical distribution of forest cover exhibits immense regional variation driven by administrative boundaries and localized eco-zones.

Champion and Seth Classification of Forest Types

The foundational classification framework for Indian forests, devised by Sir H.G. Champion and S.K. Seth (1968), divides the country’s vegetation into 16 major groups based on temperature, rainfall, soil type, and topographic variations.

Tropical Wet Evergreen Forests

These forests thrive in regions experiencing high temperatures and heavy annual rainfall exceeding 250 cm. They lack a distinct dry season and feature a multi-tiered canopy architecture.

• Geographical Distribution: Western slopes of the Western Ghats (Kerala, Karnataka, Maharashtra), Lakshadweep and Andaman & Nicobar Islands, and the upper Brahmaputra valley of Northeast India (Assam, Arunachal Pradesh).
• Key Floral Species: Dipterocarpus macrocarpus (Hollong), Mesua ferrea (Nahor), Calamus rotang (Rattan cane), Hopea parviflora, and Artocarpus hirsutus.
• Ecological Trivia: Epiphyte and orchid diversity is highest in this zone. The forests are structurally complex, preventing sunlight from reaching the forest floor.

Tropical Semi-Evergreen Forests

Representing a transitional stage between wet evergreen and moist deciduous types, these forests occur in areas with an annual rainfall of 200 cm to 250 cm.

• Geographical Distribution: Western coast, Northeast India, and the Eastern Himalayas.
• Key Floral Species: Terminalia bialata (White Chuglam), Salmalia malabarica (Semul), Albizia procera (White Siris), and Cedrela toona (Toon).

Tropical Moist Deciduous Forests

This is the second most widespread forest type in India, flourishing in regions with rainfall between 100 cm and 200 cm and a clear dry summer season.

• Geographical Distribution: Foothills of the Himalayas (Terai-Duar region), eastern slopes of the Western Ghats, Chota Nagpur Plateau, Odisha, Chhattisgarh, and parts of the eastern plains of Madhya Pradesh.
• Key Floral Species: Tectona grandis (Teak), Shorea robusta (Sal), Dalbergia sissoo (Shisham), Terminalia tomentosa (Asan), and Santalum album (Sandalwood).
• Ecological Fact: Teak is predominantly found in the central and southern regions, while Sal dominates the northern and eastern sub-Himalayan zones.

Tropical Dry Deciduous Forests

This is the single most extensive forest type in India by percentage area, occurring where annual rainfall ranges between 70 cm and 100 cm.

• Geographical Distribution: Across the vast interior plains of the Indian Peninsula, stretching through Uttar Pradesh, Bihar, Madhya Pradesh, Maharashtra, Gujarat, Andhra Pradesh, and Tamil Nadu.
• Key Floral Species: Anogeissus latifolia (Axlewood / Dhau), Diospyros melanoxylon (Tendu), Butea monosperma (Flame of the Forest), Madhuca longifolia (Mahua), and Acacia catechu (Khair).
• Ecological Fact: These forests shed their leaves entirely during the dry summer months, giving the landscape an open, barren look.

Tropical Thorn Forests

These xerophytic formations are restricted to arid and semi-arid tracts where the annual rainfall is less than 50 cm.

• Geographical Distribution: Semi-arid areas of Southwest Punjab, Haryana, West Rajasthan, Upper Gujarat, and the rain-shadow regions of the Deccan Plateau.
• Key Floral Species: Prosopis cineraria (Khejri), Acacia nilotica (Babool), Ziziphus mauritiana (Ber), and various succulent Euphorbia species.
• Cultural Trivia: The Khejri tree holds sacred status among the Bishnoi community of Rajasthan and is the state tree of Rajasthan.

Subtropical Pine Forests

These open-canopy coniferous forests are dominated by a single pine species and occur in the subtropical altitudinal belt of 1,000 meters to 1,800 meters.

• Geographical Distribution: Along the entire length of the Central and Western Himalayas (Jammu & Kashmir, Himachal Pradesh, Uttarakhand) and the Khasi Hills of Meghalaya.
• Key Floral Species: Pinus roxburghii (Chir Pine) and Pinus wallichiana (Blue Pine).
• Ecological Risk: Chir pine forests are highly prone to devastating forest fires during the pre-monsoon summer due to the accumulation of highly inflammable dry pine needles on the forest floor.

Montane Wet Temperate Forests

These are closed-canopy, low-stature forests found at an altitude of 1,500 meters to 3,000 meters in regions with high rainfall and cool temperatures.

• Geographical Distribution: Higher reaches of the Nilgiri and Palani hills in the South, and the Eastern Himalayas (West Bengal, Sikkim, Arunachal Pradesh).
• Key Floral Species: Northern zone features Quercus (Oak), Castanopsis (Chestnut), and Acer (Maple). Southern zone features Rhododendron nilagiricum, Syzygium, and Michelia.
• Eco-Zonal Terminology: In the Southern Western Ghats, these temperate forest patches growing in wind-sheltered valleys are known locally as Sholas, which exist in a natural mosaic with rolling grasslands.

Himalayan Moist and Dry Temperate Forests

Occurring between 1,500 meters and 3,300 meters, the moist variant covers the outer Himalayas with moderate to high rainfall, while the dry variant is restricted to the inner, rain-shadow valleys.

• Geographical Distribution: Kashmir, Himachal Pradesh, Uttarakhand, Sikkim, and Arunachal Pradesh.
• Key Floral Species: Cedrus deodara (Deodar), Picea smithiana (Spruce), Abies pindrow (Silver Fir), and Cupressus torulosa (Cypress).
• Timber Fact: Deodar is highly valued for its durable, rot-resistant wood, historically utilized for railway sleepers and structural construction.

Alpine and Sub-Alpine Forests

These represent the highest altitudinal forest zone, transitioning into alpine scrub and meadows near the permanent snow line (>3,000 meters).

• Geographical Distribution: High-altitude zones of both the Western and Eastern Himalayas.
• Key Floral Species: Betula utilis (Bhojpatra / Himalayan Birch), Juniperus communis (Juniper), and dwarf Rhododendron species.
• Historical Trivia: The bark of Betula utilis (Bhojpatra) was used in ancient India as writing paper for composing manuscripts.

Littoral and Swamp Forests

These specialized wetland ecosystems develop along river deltas, estuaries, saline flats, and fresh-water swamps.

• Geographical Distribution: Major river deltas (Ganga-Brahmaputra, Mahanadi, Godavari, Krishna) and the Andaman & Nicobar coastlines.
• Key Floral Species: Heritiera fomes (Sundari), Rhizophora mucronata, and Avicennia marina.

Constitutional, Legal, and Institutional Framework

Constitutional Provisions

• Article 48A (Directive Principles of State Policy): Mandates that the State shall endeavor to protect and improve the environment and to safeguard the forests and wildlife of the country.
• Article 51A(g) (Fundamental Duties): Obligates every citizen of India to protect and improve the natural environment including forests, lakes, rivers, and wildlife.
• Seventh Schedule Allocation: Forests were moved from the State List to the Concurrent List via the 42nd Constitutional Amendment Act of 1976, empowering both the Central and State governments to legislate on the subject.

Core Legislation and Policy Interventions

• Indian Forest Act, 1927: Provides the legal framework for declaration of Reserved and Protected forests and regulates the transit of forest produce.
• Forest (Conservation) Act, 1980: Prohibits the de-reservation of forests or use of forest land for non-forest purposes without prior approval from the Central Government. The Act mandates Compensatory Afforestation when forest land is diverted.
• National Forest Policy, 1988: Shifts the focus from commercial timber exploitation to environmental stability and ecological balance. It sets a national target of achieving a minimum of 33% of total geographical area under forest and tree cover (67% in mountainous regions).
• Scheduled Tribes and Other Traditional Forest Dwellers (Recognition of Forest Rights) Act, 2006 (FRA): Recognizes and vests the forest rights and occupation in forest land for Forest Dwelling Scheduled Tribes (FDST) and Other Traditional Forest Dwellers (OTFD). It empowers the Gram Sabha to protect, regenerate, and manage Community Forest Resources (CFR).