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Conservation of Plants and Animals Class 8 Science Free Notes and Mind Map (Free PDF Download)

conservation

Our planet’s plants and animals form the delicate web of life that sustains all living beings. From the oxygen we breathe to the food we eat, biodiversity provides essential resources for human survival. However, human activities like deforestation, urbanization, and pollution are threatening this balance at an alarming rate. Every year, we lose approximately 10 million hectares of forests – equivalent to 27 soccer fields every minute. Conservation of Plants and Animals is important for survival of humans.


1. Deforestation: Causes and Consequences

What is Deforestation?

The large-scale removal of forest cover primarily for:

Major Causes of Deforestation

CauseExamplesImpact
AgricultureCattle ranching, palm oil plantations80% of deforestation globally
LoggingFurniture, paper productionLoss of 15 billion trees annually
UrbanizationRoads, housing projectsFragments wildlife habitats
MiningCoal, iron ore extractionPermanent ecosystem damage

Devastating Consequences

1. Climate Change

2. Water Cycle Disruption

3. Soil Degradation

4. Biodiversity Loss

5. Economic Impact


2. Conservation Strategies

Protected Areas Comparison

TypePurposeHuman ActivityExamples
Biosphere ReserveProtect biodiversity + local cultureLimitedPachmarhi (India)
National ParkPreserve ecosystemsRestrictedSatpura (India), Yellowstone (USA)
Wildlife SanctuaryProtect specific speciesSome permittedKaziranga (Rhinos), Periyar (Elephants)

Key Features:


3. Biodiversity Hotspots

Flora and Fauna of Pachmarhi Biosphere Reserve

CategorySpeciesSpecial Characteristics
FloraSal, Teak, Wild MangoEndemic to Central India
FaunaGiant Squirrel, Leopard, BarasinghaMany endangered species
BirdsHornbills, Migratory speciesWinter visitors from Siberia

Did You Know? The Giant Squirrel of Pachmarhi can grow up to 1 meter long!


4. Endangered Species Protection

Red Data Book Categories

StatusDefinitionIndian Examples
Critically EndangeredExtremely high extinction riskGreat Indian Bustard
EndangeredVery high risk in near futureBengal Tiger
VulnerableHigh risk in medium-termAsian Elephant

Conservation Success Stories:


5. Solutions and Actions

Reforestation Methods

MethodProcessBenefits
Natural RegenerationLetting forests regrow naturallyLow-cost, high biodiversity
AfforestationPlanting new treesQuick results, controlled species
AgroforestryCombining crops with treesSustainable land use

Paper Recycling Process

  1. Collection of waste paper
  2. Pulping and cleaning
  3. Removal of inks/contaminants
  4. Sheet formation and drying

Impact:


6. Frequently Asked Questions

Q: Why can’t we just keep animals in zoos instead of sanctuaries?
A: Zoos have limited space and can’t maintain natural behaviors. Sanctuaries preserve entire ecosystems.

Q: How does migration help conservation?
A: Tracking migratory patterns helps identify critical habitats needing protection across borders.

Q: What can students do to help?
A: Simple actions matter:


7. Summary

✔ Deforestation has cascading environmental impacts
✔ Protected areas follow different conservation approaches
✔ Endemic species require special protection efforts
✔ Every individual can contribute to solutions

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