Unit - 4, Biodiversity and Environment

 Unit - 4

Biodiversity and Environment

(3) Answer the Following Questions

a. Write the importance of biodiversity:
Biodiversity is important because:

1. It supports ecosystem stability and resilience.
2. It provides essential resources like food, medicine, and raw materials.
3. It maintains ecological balance and supports life cycles.
4. It offers aesthetic and cultural value to humans.

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b. How can we maintain ecosystem balance?
To maintain ecosystem balance:

1. Protect wildlife habitats and prevent deforestation.
2. Promote sustainable use of natural resources.
3. Minimize pollution and control the use of harmful chemicals.
4. Encourage biodiversity conservation programs and public awareness.

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c. What is a wetland?
A wetland is a natural or artificial area of land saturated with water, either permanently or seasonally. Wetlands are important ecosystems that support diverse plant and animal life. Examples include swamps, marshes, and bogs.

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d. Why are water reservoirs important?
Water reservoirs are important because:

1. They store water for drinking, irrigation, and industrial use.
2. They help in flood control and groundwater recharge.
3. They support aquatic ecosystems and biodiversity.
4. They can generate hydroelectric power.

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e. Mention major methods of solid waste management:

1. Reduce, Reuse, Recycle: Minimize waste production and recycle materials.
2. Composting: Turn organic waste into fertilizer.
3. Landfilling: Dispose of non-recyclable waste in landfills.
4. Incineration: Burn waste to generate energy.
5. Waste segregation: Separate biodegradable and non-biodegradable waste.

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f. How does the extensive use of chemical fertilizers and insecticides deplete natural resources?
The extensive use of chemical fertilizers and insecticides depletes natural resources by:

1. Soil degradation: Overuse reduces soil fertility and causes erosion.
2. Water pollution: Chemicals leach into water sources, harming aquatic ecosystems.
3. Loss of biodiversity: Harmful chemicals kill beneficial organisms, reducing biodiversity.
4. Air pollution: Excessive use releases harmful gases, contributing to pollution.

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g. Explain the importance of wetlands:
Wetlands are important because:

1. They act as natural water filters, removing pollutants.
2. They provide habitats for diverse plants and animals.
3. They help control floods by absorbing excess water.
4. They play a key role in carbon storage, mitigating climate change.
5. They support livelihoods through fishing and farming.

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h. "Nepal is rich in biodiversity." Justify the statement:
Nepal is rich in biodiversity due to:

1. Diverse geography: Nepal has a wide range of altitudes, from the lowland Terai to the Himalayan peaks.
2. Varied ecosystems: It includes forests, grasslands, wetlands, and alpine regions.
3. Climate variation: Different climatic zones support a variety of flora and fauna.
4. Unique species: Nepal is home to rare species like the red panda, snow leopard, and rhododendrons.
5. Protected areas: Numerous national parks and conservation areas safeguard biodiversity.
   This makes Nepal a biodiversity hotspot of global significance.

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