Model Answer

Wetlands are transitional ecosystems where land is saturated with water either permanently or seasonally. They include marshes, swamps, mangroves, floodplains, lakes and estuaries. Wetlands are among the most productive ecosystems and play a crucial role in maintaining ecological balance and supporting sustainable development.

Role of Wetlands in Ecological Balance and Sustainable Development

1. Biodiversity Hotspots

Wetlands provide habitat, breeding and feeding grounds for numerous species of birds, fish, amphibians and aquatic plants. For example, Keoladeo National Park supports thousands of migratory birds.

2. Flood Control and Water Regulation

Wetlands act like natural sponges by absorbing excess rainwater and reducing flood intensity. They regulate river flow and recharge groundwater.

3. Water Purification

Wetlands filter pollutants, sediments and toxic substances through natural biological processes, thereby improving water quality.

4. Climate Regulation

Mangroves, peatlands and marshes store large amounts of carbon and help mitigate climate change by acting as carbon sinks.

5. Livelihood Support

Millions of people depend on wetlands for fishing, agriculture, tourism and collection of forest products. Chilika Lake supports the livelihood of local fishing communities.

6. Coastal Protection

Coastal wetlands and mangroves protect shorelines from cyclones, tsunamis and coastal erosion.

Major Threats to Wetlands in India

1. Urbanisation and Encroachment

Rapid expansion of cities has led to reclamation and destruction of wetlands for infrastructure and real estate projects.

2. Pollution

Discharge of untreated sewage, industrial effluents and agricultural runoff causes eutrophication and loss of aquatic biodiversity.

3. Climate Change

Rising temperatures, irregular rainfall and sea-level rise threaten the ecological character of wetlands.

4. Overexploitation of Resources

Excessive fishing, sand mining and extraction of groundwater disturb wetland ecosystems.

5. Invasive Species

Species such as water hyacinth reduce oxygen levels and affect native flora and fauna.

6. Weak Governance and Lack of Awareness

Poor implementation of conservation laws and lack of community participation contribute to degradation.

Measures for Conservation

1. Effective Implementation of Wetland Rules

Proper enforcement of the Wetlands (Conservation and Management) Rules, 2017 is necessary.

2. Ramsar Site Protection

India should strengthen protection and monitoring of Ramsar wetlands. Ramsar Convention provides an international framework for wetland conservation.

3. Community Participation

Local communities should be involved in restoration and sustainable management practices.

4. Scientific Mapping and Monitoring

Use of GIS, remote sensing and ecological assessments can help identify vulnerable wetlands.

5. Pollution Control Measures

Treatment of sewage and regulation of industrial discharge are essential.

6. Restoration Programmes

Degraded wetlands should be restored through afforestation, desiltation and biodiversity conservation initiatives.

Conclusion

Wetlands are ecological lifelines that ensure biodiversity conservation, water security and climate resilience. Their protection is essential not only for environmental sustainability but also for achieving sustainable development goals. A combination of strong policy implementation, scientific management and public participation is necessary to conserve these valuable ecosystems for future generations.