Population structure and population pyramid

population structure & population pyramid

• DTM (Demographic Transition Model) means population change model.
• it can change in 2 ways: 1. change over space and change over time.
• it has 4 to 5 stages.
• 
• Caption: DEMOGRAPHIC TRANSITION MODEL

THE STAGES OF DTM:

• STAGE 1:
• Both BR and DR are high and fluctuating.
• This results in stable or low population growth
• Reason of High BR :- Early Marriage
• Lack of family Planning,
• Religious belief and some family need
• children to work on the farm.
• Natural increase (population growth) is low because both birth rate and death rate are HIGH / small gap between birth rate and death rate.

Slide 3

• Stage 2: