India's Ponds: Diverse Ecosystems Teeming With Life
Indian ponds, known by various regional names like 'pukur' and 'johad', are vital ecosystems supporting a wide array of aquatic and terrestrial life. Their diverse characteristics influence the specific flora and fauna found within and around them.
Key takeaways
- Traditional Indian ponds, known by various regional names, are diverse ecosystems influenced by their physical characteristics and water sources.
- These ponds support a wide range of life, from microscopic organisms and insects to fish, amphibians, reptiles, and birds.
- Examples like West Bengal's pukurs and Rajasthan's johads illustrate how these water bodies function as complete food chains and vital water sources.
- Seasonal changes in water levels in ponds like Tamil Nadu's eris create dynamic habitats for different species.
Across India, bodies of water known by distinct regional names such as 'pukur' in Bengal, 'johad' in Rajasthan, 'eri' and 'kulam' in Tamil Nadu, 'kere' in Karnataka, 'pokhari' in Odisha, 'talao', and 'beel' in Assam serve as vibrant ecosystems. These ponds, varying in water source, depth, and seasonal water retention, shape the diverse life they host, including fish, frogs, insects, reptiles, and birds.
What Happened
The report details the ecological significance of various types of traditional Indian ponds, highlighting the life they support. In West Bengal, 'pukurs' demonstrate a complete food chain, from algae and plankton to fish, frogs, and predatory birds like egrets and kingfishers. In Rajasthan, 'johads' collect monsoon runoff, creating temporary pools that allow tadpoles to develop and frogs to breed, while also providing drinking water and food sources for birds and other animals in arid regions. Tamil Nadu's 'eris' are irrigation tanks whose water levels fluctuate with rainfall and usage, creating varied habitats for fish, frogs, insects, and a range of wading birds. Karnataka's 'keres' are historical water storage systems that support fish, insects, frogs, and birds through their open water, plants, and shallow edges. Odisha's 'pokharis' are traditional village tanks that collect runoff, serving as communal spaces where land, water, plants, and animals converge. In Tamil Nadu, connected 'kulams' function as networks of tanks and canals, storing water for agriculture and providing habitats for aquatic life.
Key Facts
- Indian ponds have distinct regional names, including pukur (Bengal), johad (Rajasthan), eri and kulam (Tamil Nadu), kere (Karnataka), pokhari (Odisha), talao, and beel (Assam).
- These ponds differ in water source, depth, water retention, and seasonal changes, which influence the types of life they support.
- In West Bengal, pukurs contain fish that feed on algae and smaller organisms, frogs that hunt insects, and underwater life including dragonfly larvae and snails.
- Predators like water snakes and birds such as kingfishers and egrets inhabit these ponds.
- A conservation pond in the Sundarbans has recorded native fish, frogs, snakes, birds, and dozens of dragonfly and damselfly species.
- Rajasthan's johads collect monsoon runoff, creating temporary pools for tadpoles and breeding frogs, and attracting birds for drinking and feeding.
- Tamil Nadu's eris, used for irrigation, support fish, frogs, and insects when water levels are high, and become feeding grounds for birds like egrets, herons, and storks as water recedes.
- Karnataka's keres are water harvesting systems supporting fish, insects, frogs, and birds.
- Odisha's pokharis are village tanks integrated into the local ecosystem where people, land, water, and animals coexist.
- Tamil Nadu's kulams can form connected systems with canals and sluices, storing water and supporting aquatic life.
Sources reviewed
Project Chintan independently synthesized and analyzed information cross-checked across the sources listed above.
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