PPT-World Population Growth: Benefits and Drawbacks

By Shaheen L amp Vasudha A Background Info Definition of Population Growth An increase in the number of people that reside in a country state country or city Why are we passionate. Michael Ward. London and the Nation Conference. Birkbeck, 10 July 2015. Which London? . Summary. 1 diagram – population change. 1 policy change: from an old to a new consensus . Issues for the future. The author is Senior Economist with the Economic Policy Department, PREM Network, The World Bank, 1818 H Street, NW, Washington DC 20433; email worldbank.org . This paper has not undergone the review Photo of introduced (exotic) rabbits at “plague proportions” in Australia from Wikimedia Commons.. Life Cycle Diagram. 0. 1. 2. 3. 0.3. 0.8. 0. 2. 4. seed. 1 to 2 . yr. old . adult. 2. to 3 . yr. Factors Affecting Population Growth. Populations grow and shrink in response to abiotic and biotic factors.. Abiotic. – physical & chemical factors such as water & light availability, soil structure, salinity, pH, etc.. Graphs & Histograms. When conditions are . ideal. for growth and reproduction, a population will experience a rapid . increase. in size. . Initially the population grows . slowly. , but the larger the population gets, the faster it grows. As more offspring survive and reproduce, even more offspring are born.. As told by Dr. F. Elwell. World Population. In the six seconds it takes you to read this sentence, 24 people will be added to the earth's population.. Within an hour, 11,000 will be added.. By day's end...260,000.. SHEN KE. Course. . description. Study of . demography. : . the systematic and scientific study of human populations. . Origin of the word . demography. The term . demography . was first used in 1855 by the Belgian statistician Achille Guillard in his book . Global pop Growth Rate: Sample 1. Worldwide, there were 20 births and 8 deaths per 1,000 in 2009. Calculate the growth rate of the . world . in 2009.. Global pop Growth Rate: Sample 1. Population growth rate – . Global pop Growth Rate: Sample 1. Worldwide, there were 20 births and 8 deaths per 1,000 in 2009. Calculate the growth rate of the . world . in 2009.. Global pop Growth Rate: Sample 1. Population growth rate – . Benefits. Hugely productive (for 60 years only). Agricultural Systems. Conventional. Benefits. Hugely productive (for sixty years). It’s traditional—everyone understands it. Agricultural Systems. An interbreeding group of the . same species. living in the same general area. may be distinguished by natural or . . arbitrary boundaries. Population Density vs Dispersion. the number of individuals per unit area or volume. Planning to install carpet on stairs? Read our article and know the benefits and drawbacks of using carpet on staircase at your home. Most . populations . live together in clumps or patches.. Populations can grow, shrink, or remain stable. Population Dynamics. Age Structure. – proportions of individuals at various ages. Population Density. SW: discuss with their groups how estimating a population could be used in a real world situation.. Population Ecology. Measuring a population. Growth Curves. Biotic Potential vs. Environmental. Resistance.