Question

Give an account on population regulation.

Hint:

Remember: Population control = Density-dependent + Independent factors.

Answer 1

Concept: Population regulation refers to the control of population size by various factors to maintain ecological balance.
Step 1: Definition.
Population regulation is the process by which population size is maintained within limits by environmental and biological factors.
Step 2: Types of factors.

• Density-dependent factors:
  • Competition for food and space
  • Predation
  • Diseases and parasites
• Density-independent factors:
  • Climate changes (temperature, rainfall)
  • Natural disasters (floods, droughts)

Step 3: Biotic potential and environmental resistance.

• Biotic potential $\rightarrow$ Maximum reproductive capacity
• Environmental resistance $\rightarrow$ Factors limiting population growth

Step 4: Growth patterns.

• Exponential growth (J-shaped curve)
• Logistic growth (S-shaped curve with carrying capacity)

Step 5: Conclusion.
Thus, population regulation maintains ecological balance through interaction of various biotic and abiotic factors.