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Definition of Nature-based Solutions (NBS)

Nature-based Solutions (NBS) refer to the sustainable management, protection, and restoration of natural or modified ecosystems to address societal needs while enhancing environmental and economic resilience. NBS include practices such as increasing green cover through forestry, constructing green roofs, and developing rain gardens. These solutions integrate nature into urban planning and disaster risk reduction, aiming to solve environmental, social, and economic challenges.

How NBS Assist in Adapting to Hazards

NBS can play a crucial role in adapting to a range of natural hazards:

1. Coastal Hazards: By protecting and restoring coral reefs, NBS can help safeguard coastal communities from flooding, storm surges, and erosion. Additionally, increasing mangrove density is effective in mitigating the impacts of rising sea levels and coastal erosion.
2. Flooding and Stormwater Management: In urban areas, NBS like green roofs, rain gardens, and constructed wetlands absorb stormwater, reducing flood risks. These solutions also help preserve freshwater ecosystems by managing runoff and reducing pollution.
3. Urban Heat Stress: Expanding green spaces in cities helps mitigate the urban heat island effect, reducing the risk of heat stress and improving overall urban resilience.
4. Climate Change Mitigation: Forests play a critical role in sequestering carbon, thus aiding in climate change mitigation. Preventing deforestation and degradation can reduce carbon emissions, which in turn helps mitigate the impacts of global warming.
5. Soil and Water Management: NBS such as forest management help stabilize soil and reduce water runoff, mitigating risks of landslides, soil erosion, and siltation. Agroforestry improves soil moisture retention, helping to adapt to droughts, crop failures, and livestock losses.
6. Water Treatment: Wetlands, recognized for their ability to filter water, are effective in wastewater treatment and serve as carbon sinks. Additionally, enhancing riparian ecosystems can help protect watersheds and regulate river flow, especially in regions experiencing drought.

Challenges and Opportunities in India

To fully harness the potential of NBS, India needs to increase investment, improve governance, and empower local communities. Regional and international cooperation is also crucial for the effective implementation of these solutions.

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Ethnic and indigenous communities in India, comprising around 68 million people, play a pivotal role in the conservation of biodiversity. Living in proximity to forests, they have developed sustainable practices that help preserve the natural environment over generations.

1. Cultural and Religious Integration Many tribal communities integrate conservation into their cultural beliefs, often treating certain plants or animals as sacred. For example, the Gond tribe in the Western Ghats protects sacred groves of the mango tree (Mangifera Indica) due to their belief in the tree being the abode of deities. This cultural reverence helps maintain biodiversity by preventing the destruction of these ecosystems.

2. Use of Traditional Knowledge Indigenous communities possess traditional ecological knowledge, passed down through generations. This knowledge enables them to utilize a wide range of plant species without overexploiting them. For example, tribes in southern India use up to 1,500 plant species, compared to the 100-150 species typically relied upon by others. This diversity helps prevent overharvesting of any single species and promotes ecosystem balance.

3. Sustainable Practices in Agriculture Tribal communities in India follow sustainable agricultural practices that ensure species conservation. For instance, the Kadars in Tamil Nadu selectively harvest mature yam plants, and the Gaddi and Gujjar tribes practice controlled grazing to prevent the overgrowth of wild grasses. These methods contribute to maintaining the health of local ecosystems.

4. Species-Specific Conservation Some indigenous tribes avoid hunting certain species they consider sacred. The Adi tribe in Arunachal Pradesh, for example, does not hunt tigers, sparrows, or pangolins, believing these creatures bring good fortune. Such species-specific taboos contribute to species preservation.

5. Environmental Movements and Collective Responsibility Indigenous communities have initiated numerous environmental movements to protect ecosystems, such as the Bishnoi movement in Rajasthan and the Jungle Bachao Andolan in Bihar. Furthermore, they practice collective responsibility by ensuring that saplings are not destroyed and only necessary resources are collected from nature.

6. Collaboration with Government Many tribal communities collaborate with governmental bodies and NGOs in conservation efforts. The Singchung Bagun Village Community Reserve in Arunachal Pradesh, for instance, was created to protect a rare bird species through a joint effort between the Bagun tribe, researchers, and the forest department.

In conclusion, ethnic and indigenous communities have developed an in-depth understanding of local ecosystems, contributing significantly to the conservation of biodiversity in India. Recognizing their vital role and adopting a rights-based approach can greatly enhance India’s conservation efforts.

Model Answer

1. Globalization and Trade: Increased international trade, transportation, and tourism have facilitated the movement of non-native species. For example, the Argentine ant has become a significant threat to native Hawaiian arthropods due to global shipping routesIllegal Wildlife Trade: The trade of exotic plants and animals contributes to the spread of IAS. Species such as tree squirrels have been introduced worldwide, mainly through the international pet trade .
2. Natural Predators: When IAS are introduced into new environments, they often lack natural predators, allowing them to proliferate uncontrollably. A case in point is the brown tree snake in Guam, which caused the extinction of several bird species due to the absence of predators .
3. *High Surv: Certain IAS, like the Senna plant, possess high reproductive rates and rapid growth, enabling them to dominate ecosystems and outcompete native species .

Harmful Effects India

1. Threats to Natural Systems: Around 66% of India’s natural ecosystems are threatened by IAS. For instance, the Nilgiri Biosphere Reserve in the Western Ghats is heavily impacted by the invasion of species like Lantana camara, Prosopis juliflora, and Chromolaena odorata .
2. Economic Losses: IAS posecant economic threat. The loss of ecosystem services due to IAS affects forestry, agriculture, fisheries, and other natural systems, costing the Indian economy an estimated $182.6 billion .
3. Biodiversity Threats: IAS suppressodiversity and cause local extinctions. For example, the spread of Prosopis juliflora in Tamil Nadu has altered agricultural lands and grazing commons, forcing local communities to seek new livelihoods .
4. Health Risks: Some IAS, such as the Asian tito, are vectors of diseases like Dengue and Chikungunya, posing significant health threats to humans .

In summary, the spread of IAS is driven by globalizati and a lack of natural predators, which disrupt ecosystems, economies, and human health. Addressing this challenge is crucial for India’s biodiversity conservation and sustainable development efforts.