Western Ghats — Biodiversity & Conservation Status

Biodiversity Profile

  • One of Earth’s eight “hottest hotspots” of biodiversity
  • Endemism rates — species found nowhere else:
CategoryEndemic Share
Tree species54%
Amphibians65%
Reptiles62%
  • Contains at least 325 globally threatened species

Key Endemic Fauna

SpeciesConservation Status
Lion-tailed MacaqueEndangered
Nilgiri TahrEndangered
Purple FrogEndangered
Malabar CivetCritically Endangered

Critical Status Update (2025–2026)

  • IUCN downgraded Western Ghats’ outlook → “Significant Concern” in World Heritage Outlook 4 report (late 2025)
  • Drivers of downgrade: unregulated tourism + invasive species + climate-induced rainfall variability
  • Significance of designation → acts as a “red flag”: site values actively threatened → immediate additional conservation measures required to prevent further loss

Key Threats

Overview

  • UNESCO World Heritage Site + global biodiversity hotspot → now classified “Significant Concern” by IUCN (2025–2026)

Threat Summary Table

#Threat CategoryKey Example
1Climate Change & Altered HydrologyWayanad/Kodagu landslides
2Infrastructure & DevelopmentSillahalla Pumped Storage Project
3Invasive Alien SpeciesLantana camara in Bandipur
4Unregulated Tourism & HWC100–120 conflict incidents/year
5Policy & Governance GapsESA notifications pending/rejected

1. Climate Change & Altered Hydrology

  • Climate change has replaced hunting as the most pervasive threat
  • Endemic birds (Nilgiri flycatcher, black-and-orange flycatcher) → forced to higher altitudes due to rising temperatures
  • Unpredictable rainfall → surge in deadly landslides & floods (notably Wayanad, Kodagu)
  • Projections: evergreen forest cover → 10% by 2029 → potential loss of 33% of regional biodiversity by 2050

2. Infrastructure & Developmental Pressure

  • Unplanned development → fragmentation of wildlife corridors
  • Sillahalla Pumped Storage Project (Nilgiris) — cost ₹5,843 crore → threatens to submerge old-growth forests + disrupt riverine ecosystems
  • Hubbali-Ankola Railway Project — road/rail expansion
  • Urbanisation + monoculture plantations (tea, coffee, rubber) → replacing natural evergreen forest

3. Invasive Alien Species (IAS)

  • IAS form dense thickets → block native flora regeneration → disrupt food chain for elephants, gaur
Invasive SpeciesImpact
Lantana camaraInvaded ~75% of Bandipur NP; decimated native fruit trees
Senna spectabilisDense thickets → no understorey regeneration
Eupatorium spp.Outcompetes native ground flora

4. Unregulated Tourism & Human–Wildlife Conflict

  • Tourism growth exceeds carrying capacity of sensitive zones
  • Garbage from tourist activity → consumed by elephants → health issues + fatal conflicts
  • Shrinking habitat → wildlife incursions into settlements → ~100–120 incidents/year in some parks

5. Policy & Governance Gaps

  • Ghats span 6 states: Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu → conflicting state priorities hinder unified conservation
  • Ecologically Sensitive Area (ESA) draft notifications based on Kasturirangan Committee report → remain pending or rejected by state governments
  • Absence of notified ESAs → no enforceable buffer against developmental encroachment

Western Ghats — Protected Areas Network

Overview

  • Ecological corridor across 6 states13 National Parks + 39 UNESCO-designated protected areas
  • Critical habitat for Bengal tiger and Nilgiri Tahr

Biosphere Reserves

ReserveStatesKey Feature
Nilgiri Biosphere ReserveKarnataka, Kerala, Tamil NaduIndia’s first biosphere reserve; largest contiguous protected forest in India; includes Bandipur, Nagarhole, Mudumalai
Agasthyamala Biosphere ReserveKerala, Tamil NaduSouthern tip of Ghats; includes Kalakad-Mundanthurai Tiger Reserve + Neyyar & Peppara Wildlife Sanctuaries

Tiger Reserves (State-wise)

StateTiger Reserves
KarnatakaBandipur, Bhadra, Kali (Dandeli-Anshi), Nagarhole, BRT
KeralaPeriyar, Parambikulam
Tamil NaduAnamalai, Mudumalai, Sathyamangalam, Kalakad-Mundanthurai, Srivilliputhur-Megamalai
MaharashtraSahyadri
  • Srivilliputhur-Megamalai → recently formed; noteworthy addition to Tamil Nadu’s reserve network

National Parks (State-wise)

StateNational Parks
KeralaSilent Valley (rare virgin rainforest), Eravikulam (Nilgiri Tahr habitat), Anamudi Shola, Mathikettan Shola, Pampadum Shola, Periyar
KarnatakaKudremukh, Nagarhole (Rajiv Gandhi), Bandipur, Anshi, Bannerghatta
Tamil NaduMudumalai, Mukurthi, Indira Gandhi (Anamalai)
MaharashtraChandoli
GoaMollem

Notable Wildlife Sanctuaries

Sanctuaries fill gaps between larger parks → function as vital wildlife corridors