Rare freshwater swamps in the Western Ghats
Why in News?
A recent study warns that rare freshwater “Myristica swamps” of the Western Ghats are on the cusp of extinction due to habitat loss, drainage for agriculture, logging, and climate variability.
Key Features & Adaptations
- Ancient Genetic History: Dating back over 500 million years, these are primitive surviving flowering ecosystems.
- Nutmeg Family Dominance: Dominated by wild nutmeg species of the Myristicaceae family like Gymnacranthera canarica and Myristica fatua.
- Unique Root & Branching Systems: Equipped with knee-like breathing roots (pneumatophores) for anaerobic conditions, stilt/prop roots for stability, and tiered pagoda branching for light capture.
Ecological & Hydrological Importance
- Hydrological Role: Act as natural landscape sponges to absorb monsoonal floods and gradually recharge local water streams during dry periods.
- Carbon Storage: Serve as massive carbon sinks with higher biomass density than surrounding evergreen forests.
- Species Sanctuary: Harbor over 600 faunal species, including endemic reptiles and amphibians such as the Malabar pit viper, Gunther's supple skink, and the Myristica Swamp Treefrog.
Major Threats & Recent Status
- Isolation: Reduced from vast coastal ranges to tiny pockets across Kerala, Karnataka, Goa, and Maharashtra.
- Human and Climatic Pressures: Threatened by agricultural conversion for rubber, tea, and areca nut plantations, alongside climate-driven shifts in monsoon patterns that disrupt seed germination.
