Archive · 3 Dec 2025
Bengaluru Lakes Ecosystems Threatened by Pollution and Invasive Species
Bengaluru's lakes, once home to unique ecosystems, are now facing serious problems.
Pollution and invasive species like tilapia and water hyacinth are causing harm.
These invaders take over the lakes, making it hard for native plants and animals to survive.
Experts say that if things don't change, these ecosystems might disappear.
The lakes were built by locals long ago to collect rainwater, but now they are filled with wastewater and dredged to a uniform depth, which disrupts the natural balance.
This has led to the loss of many native species and the spread of invasive ones, which are better at surviving in polluted water.
The situation is critical, and immediate action is needed to save these important water bodies.
Hundreds of fish and birds died recently in Doddagubbi Lake due to suspected water contamination.
Bengaluru's lakes, once diverse ecosystems, are now threatened by pollution and invasive species.
Invasive species like tilapia, African catfish, walking catfish, and mosquitofish are outcompeting native species.
Water hyacinth, an invasive plant, is displacing traditional aquatic vegetation and affecting oxygen levels.
Experts warn that ongoing pollution and development could lead to the disappearance of these ecosystems.
- Who
- Residents, experts, and invasive species affecting Bengaluru's lakes
- What
- Ecological threats to Bengaluru's lakes due to pollution and invasive species
- When
- Ongoing issue, recent fish and bird deaths reported
- Where
- Bengaluru, India, specifically Doddagubbi Lake
- Why
- Pollution, invasive species, and ecological disruption
- Location
- Bengaluru, India
- Affected Lake
- Doddagubbi Lake
- Invasive Species
- Tilapia, African catfish, walking catfish, mosquitofish
- Historical Vegetation
- Eichhornia, Ludwigia, Marsilia, Salvinia, Azolla, duckweed, Typha, Scirpus, Cyperus, Polygonum, Ipomoea, lotus, lily
- Current Dominant Vegetation
- Water hyacinth
- Study Institution
- Indian Institute of Science (IISC)
- Study Year
- 2022