Question map
Consider the following States : 1. Arunachal Pradesh 2. Himachal Pradesh 3. Mizoram In which of the above States do 'Tropical Wet Evergreen Forests' occur?
Explanation
Tropical Wet Evergreen Forests are found along the Western Ghats, the Nicobar and Andaman Islands, and all along the north-eastern region.[2] These forests occur in North-East India, parts of Western Ghats, the Andaman and Nicobar, upper Assam, lower slopes of Eastern Himalayas, Odisha, along the foot-hills of Himalayas, Bhabhar and Tarai regions.[4]
Both **Arunachal Pradesh** and **Mizoram** are part of the north-eastern region of India, where these forests naturally occur. Tropical Evergreen forests are mainly found in areas recording over 150 cm of average annual rainfall where the temperature varies between 20Β°C to 27Β°C.[4]
**Himachal Pradesh**, located in the western Himalayas, does not have the climatic conditions suitable for Tropical Wet Evergreen Forests. Instead, it features temperate and alpine vegetation types due to its higher altitude and cooler climate. The warm and humid conditions with high rainfall required for tropical wet evergreen forests are absent in Himachal Pradesh.
Therefore, among the given states, only Arunachal Pradesh (1) and Mizoram (3) have Tropical Wet Evergreen Forests, making option C the correct answer.
Sources- [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > Ro.R.R. Tropical Wet Evergreen Forests > p. 161
- [2] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > Ro.R.R. Tropical Wet Evergreen Forests > p. 161
- [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 14
- [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 14
PROVENANCE & STUDY PATTERN
Full viewThis is a classic 'Climatic Logic' question sourced directly from NCERT Class XI (India Physical Environment). It tests if you can distinguish between the 'Tropical' foothills of the North East and the 'Temperate' high-altitude belts of the Western Himalayas.
This question can be broken into the following sub-statements. Tap a statement sentence to jump into its detailed analysis.
- Explicitly states wet evergreen forests occur 'all along the north-eastern region', indicating presence in the northeastern states.
- Describes typical species and structure for wet evergreen forests found in that region, supporting the forest-type occurrence there.
- Classifies 'Tropical Evergreen' forests and lists 'North-East India' as a primary location for this forest type.
- Provides a direct linkage between the forest type (tropical evergreen) and the broader northeastern region of India.
- Names Arunachal Pradesh explicitly in the context of Himalayan forest zones, locating the state within northern/northeastern forest regions.
- Helps connect the general 'north-eastern region' references in other snippets to Arunachal Pradesh specifically (geographic placement).
Gives the canonical geographic distribution of Tropical Wet Evergreen Forests: Western Ghats, Andaman & Nicobar, and the north-eastern region.
A student could compare this list to a map showing Himachal Pradesh's location (northern Himalaya) to judge if Himachal lies within those regions.
Defines the climatic requirements: warm, humid areas with annual precipitation over 200 cm and mean annual temperature above 22Β°C for tropical evergreen forests.
A student can check Himachal's climate (altitude-driven lower temperatures and rainfall patterns) to see if it meets these temperature and precipitation thresholds.
Describes the Himalayan altitudinal succession: tropical at foothills, then wet temperate (1,000β2,000 m) and higher montane zones β indicating different forest types with altitude in the Himalaya.
A student could use Himachal's elevation profile to infer which altitudinal vegetation zones predominate there and whether lowland tropical evergreen conditions are present.
Lists Himalayan forest types found in Himachal (e.g., Himalayan Dry Temperate, montane wet temperate) and names coniferous/temperate species rather than tropical evergreen species.
Compare species and forest types listed for Himachal with species typical of tropical wet evergreen forests to evaluate overlap or absence.
Provides another authoritative enumeration of states/UTs where Tropical Wet-evergreen Forests occur (Andaman & Nicobar and Western Ghats) and lists characteristic species.
A student could check whether those characteristic species (e.g., betel-nut palm, jackfruit) are native or reported from Himachal; absence would argue against tropical evergreen presence.
- Explicitly states "Wet evergreen forests... all along the north-eastern region."
- If wet evergreen forests occur all along the north-eastern region, that supports their presence in states of that region (including Mizoram).
- Says these forests are found in the "hills of the northeastern region."
- Hills of the NE region are the typical terrain of many north-eastern states, consistent with occurrence in Mizoram.
- Lists "North-East India" among areas where tropical evergreen forests are found.
- Inclusion of North-East India as a distribution area reinforces that north-eastern states (such as Mizoram) are within the range.
- [THE VERDICT]: Sitter. Directly solvable from NCERT Class XI, Chapter 5 (Natural Vegetation).
- [THE CONCEPTUAL TRIGGER]: The link between 'Latitude + Altitude' and Vegetation. You must map the 200cm+ rainfall isohyets to state boundaries.
- [THE HORIZONTAL EXPANSION]: Memorize the specific locations of: 1) Tropical Dry Evergreen (Tamil Nadu Coast - Winter Rain), 2) Shola Forests (Nilgiris/Anamalais - Temperate in Tropics), 3) Montane Wet Temperate (Eastern Himalayas vs Western Himalayas), and 4) The 'Sal' vs 'Teak' dividing line in Central India.
- [THE STRATEGIC METACOGNITION]: Do not just memorize 'North East = Evergreen'. Differentiate between the 'Tropical' foothills (Arunachal/Assam) and the 'Temperate' upper reaches. The keyword 'Tropical' eliminates high-latitude/high-altitude states like Himachal immediately.
Several references map tropical wet/evergreen forests to the Western Ghats, Andaman & Nicobar and the north-eastern region β the core issue behind the statement.
High-yield for physical geography and environment questions; knowing regional distributions helps answer location-based and conservation questions. Connects to biodiversity, climatic controls on vegetation, and state-level forest profiles. Study by comparing lists/maps in standard sources and practicing location-identification questions.
- Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > Ro.R.R. Tropical Wet Evergreen Forests > p. 161
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Tropical Evergreen and Semi Evergreen Forests > p. 42
- Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 14
References contrast tropical evergreen with semi-evergreen and moist deciduous types and list their typical states and species.
Frequently tested in UPSC (definitions, distinguishing features, state-wise occurrence). Helps in map-based and concept questions on vegetation and climate. Prepare by memorizing key features, species examples, and regional occurrences; use comparative tables.
- Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 4: BIODIVERSITY > social relevance of forests > p. 21
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Tropical Evergreen and Semi Evergreen Forests > p. 42
- Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 15
References place Arunachal Pradesh in Himalayan montane forest contexts (montane wet temperate), useful to link the state to broader north-eastern forest distributions.
Important for questions linking physiography, altitude belts, and forest types in the Himalaya. It enables reasoning about which forest types can occur in which states. Study altitudeβvegetation relationships and state examples; use sketch maps to cement spatial links.
- Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > rb.1.1r. Montane Wet temperate forests > p. 163
- Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 18
Several references specify the locations where tropical wet evergreen forests occur (Western Ghats, Andaman & Nicobar, north-eastern region).
High-yield for UPSC geography: knowing the precise regional distribution of major forest types helps answer location-based and ecosystem questions. It connects to climate, rainfall patterns and regional biogeography. Prepare by memorizing forest-type maps and cross-linking with rainfall/temperature requirements.
- Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > Ro.R.R. Tropical Wet Evergreen Forests > p. 161
- Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 4: BIODIVERSITY > social relevance of forests > p. 21
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Tropical Evergreen and Semi Evergreen Forests > p. 42
References contrast tropical evergreen forest characteristics and locations with montane/wet temperate forest belts in the Himalayas.
Useful for questions comparing forest types and for eliminating options (e.g., confusing Himalayan montane forests with tropical evergreen). It links vegetation to altitude and climate; revise definitions, climatic thresholds, and typical species to answer comparative and applied questions.
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Tropical Evergreen and Semi Evergreen Forests > p. 42
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Montane Forests > p. 45
Evidence describes succession of vegetation from tropical/foothill deciduous to wet temperate and dry temperate types in Himalayan states (including Himachal Pradesh).
Frequently tested in UPSC for Himalayan ecology and state-wise vegetation patterns. Master zoning by altitude, associated forest types and representative states to tackle map-based and descriptive questions; use diagrams and state examples for retention.
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Montane Forests > p. 45
- Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 18
Multiple references specify the Western Ghats, Andaman & Nicobar and the north-eastern region as core areas for tropical wet evergreen forests.
High-yield for UPSC geography: questions often ask where different forest types occur. Mastering regional distribution helps in map questions, environment essays and prelim MCQs. Study strategy: memorize region lists from NCERTs and practice locating them on maps.
- Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 10: Indian Forest > Ro.R.R. Tropical Wet Evergreen Forests > p. 161
- INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 5: Natural Vegetation > Tropical Evergreen and Semi Evergreen Forests > p. 42
- Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > Table 5.5 > p. 14
The 'Tropical Dry Evergreen Forest'. It is the only forest type found on the Coromandel Coast (Tamil Nadu/Andhra) due to the North-East Monsoon. UPSC often flips the question to ask which forest type is unique to the East Coast.
Apply the 'Latitude Filter'. Himachal Pradesh lies between 30Β°N and 33Β°N. 'Tropical' forests generally require conditions found between 0Β° and 23.5Β°N (Tropic of Cancer). While 'Sub-tropical' forests exist in Himachal, 'Tropical Wet Evergreen' (Rainforests) are climatically impossible there due to cold winters. Eliminate Option 2.
Mains GS-3 (Disaster Management): The replacement of 'Wet Evergreen' broad-leaved species with 'Chir Pine' (coniferous) in the Himalayas is a major reason for increased Forest Fires and lower soil moisture retention, linking vegetation types to disaster vulnerability.