This is a powerpoint showing Malthusian theory of population and the Demographic Transition Model
This video adds a lot to the lesson as a whole
https://www.youtube.com/watch?v=QAkW_i0bDpQ&feature=em-subs_digest
This theory throws light on changes in birth and death rate and consequently on the growth rate of population. The relationship between birth and death rate changes with economic development and a country has to pass through different stages of population growth. This theory depicts the four stages of demographic transition that a country has to pass.
This theory throws light on changes in birth and death rate and consequently on the growth rate of population. The relationship between birth and death rate changes with economic development and a country has to pass through different stages of population growth. This theory depicts the four stages of demographic transition that a country has to pass.
A Brief Discussion on demographic transition theory.Rizwan Khan
Demographic transition (DT) refers to the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.
IT IS GIVEN BY: FrankW. Notestein. Frank Wallace Notestein (August 16, 1902 – February 19, 1983)
The demographic transition theory is a generalized description of the changing pattern of mortality, fertility and growth rates as societies move from one demographic regime to another.
The whole number of people or inhabitants in a country or region” -(Webster’s dictionary)
In sociology, population refers to a collection of human beings.
There are two laws of thermodynamics. On the other hand in our universe sun is the source of energy. Green plants are the only producer. Plants make their own food by sunlight with the help of water and carbon dioxide. Other animals get energy by consuming green plants, plant products and other animals. Hence the energy is cycle. So the ecosystem proves the two laws of thermodynamics.
The full Crash Course Ecology Series- now in Note-Form! I've added my own little 'twists' on the notes, and have added some pictures to make studying easier.
A Brief Discussion on demographic transition theory.Rizwan Khan
Demographic transition (DT) refers to the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.
IT IS GIVEN BY: FrankW. Notestein. Frank Wallace Notestein (August 16, 1902 – February 19, 1983)
The demographic transition theory is a generalized description of the changing pattern of mortality, fertility and growth rates as societies move from one demographic regime to another.
The whole number of people or inhabitants in a country or region” -(Webster’s dictionary)
In sociology, population refers to a collection of human beings.
There are two laws of thermodynamics. On the other hand in our universe sun is the source of energy. Green plants are the only producer. Plants make their own food by sunlight with the help of water and carbon dioxide. Other animals get energy by consuming green plants, plant products and other animals. Hence the energy is cycle. So the ecosystem proves the two laws of thermodynamics.
The full Crash Course Ecology Series- now in Note-Form! I've added my own little 'twists' on the notes, and have added some pictures to make studying easier.
Population ecology theory postulates and lessons for strategic managementJack Onyisi Abebe
The diversity of organizations in society depends on the both the number of organizational forms and the distribution of organizations over forms".
This is a dynamic process, with new forms being created, some orgs changing into other forms, and some forms going away. Organizations are created and disbanded or merged. organization that cannot change strategy and structure as quickly as their environments can change.
This PowerPoint was one very small part of my Ecology Interactions Unit from the website http://sciencepowerpoint.com/index.html .This unit includes a 3 part 2000+ Slide PowerPoint loaded with activities, project ideas, critical class notes (red slides), review opportunities, challenge questions with answers, 3 PowerPoint review games (125 slides each) and much more. A bundled homework package and detailed unit notes chronologically follow the PowerPoint slideshow.
Areas of Focus within The Ecology Interactions Unit: Levels of Biological Organization (Ecology), Parts of the Biosphere, Habitat, Ecological Niche, Types of Competition, Competitive Exclusion Theory, Animal Interactions, Food Webs, Predator Prey Relationships, Camouflage, Population Sampling, Abundance, Relative Abundance, Diversity, Mimicry, Batesian Mimicry, Mullerian Mimicry, Symbiosis, Parasitism, Mutualism, Commensalism, Plant and Animal Interactions, Coevolution, Animal Strategies to Eat Plants, Plant Defense Mechanisms, Exotic Species, Impacts of Invasive Exotic Species.
If you have any questions please feel free to contact me. Thank you again and best wishes.
Sincerely,
Ryan Murphy M.Ed
www.sciencepowerpoint@gmail.com
natural resources, introduction, ganga action plan,pollution,stake holders of forest, 3 rs,reduce,recycle,reuse,People ‘s participation in management of resources,
Importance of forests :- Chipko movement
done by rt vinay and his group
crpf public school 10 class
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
3. The Core Principles of Malthus:
¤ Food is necessary for human
existence
¤ Human population tends to grow
faster than the power in the
earth to produce subsistence
¤ The effects of these two
unequal powers must be kept
equal
¤ Since humans tend not to limit
their population size voluntarily -
“preventive checks” in Malthus’
terminology would be needed
Old dead guy
4. Malthus believed that when the
population level rose above the
food supply – then nature would
cause it to decline due to:
PESTILENCE
PLAGUE
FAMINE
WAR
Malthus suggested that
population growth should be
limited by people marrying later
– and abstaining from sex
before and outside of marriage.
5. Malthus recognised that population if
unchecked, grows at a geometric rate:
1 2 4 8 16 32
However, food only increases at an
arithmetic rate, as land is finite.
1 2 3 4 5 6
6. The ‘carrying capacity’ is the potential
of an area to support life long-term.
The area must be able to provide:
• Food and water
• Space for living and shelter
• Essential resources for life
• Able to absorb waste and pollution
If a population rises above
the ‘carrying capacity’ of
an environment – it will
struggle to survive. There
is much debate about
what the carrying capacity
of Planet Earth is.
7. Malthus (cont.)
Population grows
geometrically….
Population exceeds
carrying capacity…
Population is kept in
“check”– preventative
and/or positive checks
8. and therefore he said….
Malthusian Catastrophe
food population
TIME
9.
10.
11.
12.
13. The Demographic Transition Model
The model of demographic transition suggested that a population's
mortality and fertility would decline as a result of social and
economic development. It predicted that all countries would over
time go through four demographic transition stages.
14. STAGE 1– High Stationary or Pre-
Industrial
HIGH BIRTH RATES
Little or no family planning
Parents have many children because few survive
Many children are needed to work the land
Children are a sign of virility
Some religious beliefs and cultural traditions encourage large families
HIGH DEATH RATES
Disease and plague (e.g. bubonic, cholera, kwashiorkor)
Famine , uncertain food supplies, and poor diet
Poor hygiene, no piped clean water or sewage disposal
POPULATION GROWTH-- SLOW
15. STAGE 1 Pyramid
Due to high birth rates, the pyramid shape would have
a wide base;
Due to high death rates, the pyramid would be very
short in height; concave shape indicates low life
expectancy.
16. STAGE 2– Early Expanding or Early
Industrial
(Rapid population growth)
Ehrlich described this stage as the “population explosion”
HIGH BIRTH RATES
As STAGE 1
FALLING DEATH RATES
Improved medical care e.g. vaccinations , hospitals, doctors, new drugs, and
scientific inventions
Improved sanitation and water supply
Improvements in food production in terms of quality and quantity
Improved transport to move food and doctors
A decrease in child mortality
POPULATION GROWTH-- RAPID
17. STAGE 2 Pyramid
As death rates are addressed, the population explosion begins;
The height of the pyramid grows to reflect the prevention of more
deaths; shape becomes less concave as life expectancy increases;
The width of the base remains large due to the ongoing high birth
rates
18. STAGE 3– Late Expanding or Late
Industrial
FALLING BIRTH RATES
Family Planning utilized; contraceptives, abortions, sterilization, and other
government incentives adopted
A lower infant mortality rates means less pressure to have children
Increased mechanization and industrialization means less need for labour
Increased desire for material possessions and less desire for large families
Emancipation of women
DEATH RATES LOW
As Stage 2
POPULATION GROWTH– STILL GROWING BUT SLOWING
19. STAGE 3 Pyramid
As birth rates begin to be addressed, the base
begins to stabilize and eventually narrow;
Death rates are low and stabilized, meaning that
the pyramid continues to grow higher.
20. STAGE 4– Low Stationary or Low
Fluctuating
BIRTH RATES LOW
Fertility rates plunge to below replacement rate (2.1 children per woman)
because:
Valuation of women beyond childbearing and motherhood becomes important
Increasing value is placed on material goods over family size in modern
industrialized society
Widespread choice of contraception by families
DEATH RATES LOW
Child mortality reduced and life expectancy increased due to:
Capital ($$$) investment in medical technology
Widespread knowledge of healthy diet and lifestyle
POPULATION GROWTH– SLOW OR DECLINING (due to aging
societies)
21. STAGE 4 Pyramid
Birth rates and death rates are low; as fertility continues to
decline, an AGING SOCIETY emerges.
Pyramid seems to “invert”…
