What is Conservation of Plants and Animals Class 8: Complete Guide

Understanding Conservation of Plants and Animals

Conservation of plants and animals means protecting and preserving species and their habitats to prevent their extinction. It involves managing natural resources wisely to maintain biodiversity. Biodiversity refers to the variety of life forms on Earth, including plants, animals, and microorganisms. Conservation helps sustain the balance of ecosystems, which is vital for human survival.

In Class 8 NCERT Science, this topic highlights the importance of conserving plants and animals due to threats like habitat destruction, pollution, and poaching. Conservation ensures that future generations can enjoy and benefit from nature's resources.

Why is Conservation Important for Our Environment?

Conservation is crucial because plants and animals play specific roles in ecosystems:

• Plants produce oxygen and food through photosynthesis.
• Animals help in pollination, seed dispersal, and controlling pests.
• Both contribute to soil fertility and water purification.

When species disappear, ecosystems become unstable, leading to problems like soil erosion, climate change, and loss of resources. For example, cutting down forests reduces oxygen and increases carbon dioxide, affecting air quality.

Thus, conserving plants and animals helps maintain ecological balance and supports human needs such as food, medicine, and clean air.

Methods of Conservation Explained

There are two main methods of conservation:

1. In-situ Conservation: Protecting plants and animals in their natural habitats.

• Examples: National parks, wildlife sanctuaries, biosphere reserves.
• Benefits: Species live freely and ecosystems remain intact.

2. Ex-situ Conservation: Protecting species outside their natural habitats.

• Examples: Zoos, botanical gardens, seed banks.
• Benefits: Helps endangered species survive and multiply.

Both methods work together to conserve biodiversity effectively.

Threats to Plants and Animals in India

India is rich in biodiversity but faces many threats:

• Deforestation: Cutting trees destroys animal homes.
• Poaching: Illegal hunting endangers species like tigers and elephants.
• Pollution: Contaminates water and soil, harming life.
• Urbanisation: Expands cities, reducing natural habitats.
• Climate Change: Alters habitats and food availability.

These threats cause many species to become endangered or extinct. Class 8 students must understand these dangers to appreciate the need for conservation.

Role of People in Conservation Efforts

Everyone can help conserve plants and animals by:

• Avoiding littering and pollution.
• Planting trees and protecting forests.
• Supporting wildlife protection laws.
• Using resources like water and paper wisely.
• Educating others about the importance of biodiversity.

Government and NGOs also run awareness campaigns and create protected areas. Students can participate in tree plantation drives and wildlife clubs to contribute actively.

Worked Example: Calculating Forest Area Loss

Suppose a forest area of 1000 sq km loses 2% area every year due to deforestation. Calculate the forest area left after 3 years.

Solution:

Initial forest area = 1000 sq km Annual loss = 2% of 1000 = 20 sq km

After 1 year: 1000 - 20 = 980 sq km After 2 years: 980 - (2% of 980) = 980 - 19.6 = 960.4 sq km After 3 years: 960.4 - (2% of 960.4) = 960.4 - 19.208 = 941.192 sq km

So, after 3 years, approximately 941.2 sq km forest remains.

This example shows how deforestation steadily reduces forest cover, stressing the need for conservation.