PPT-Population Growth

Graphs amp 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. By: Shaheen L. & 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?. 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. and projections. For many years people have written about the “why’s” and “how’s” of population growth. Optimists have concentrated on how the people adapt to the demands of population. Pessimists write about the problems that population growth has caused or may cause. 1.3. Starter. Recap:. Definitions of:. Population?. Abiotic. ?. Biotic?. Learning Objectives. State what factors determine the size of a population. Describe the . abiotic. factors that affect the size of a population. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . Population ecologists are primarily interested in . understanding how biotic and abiotic factors . influence the density, distribution, size, and age structure of populations.. the overall vitality of a population of organisms.. 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.. Chapter 2 Key Issue 3. Earth. ’. s Population History. 1 billion reached circa 1830. 2 billion reached 1930 (100 years later). 3 billion reached 1959 (29 years later). 4 billion reached 1974 (15 years later). 5-1: How Populations Grow. What is a population?. . Group of individuals of the same species in a given area.. 5-1: How Populations Grow. Characteristics of Populations:. Geographic Distribution (Range). Solutions. Global pop Growth Rate: Sample 1. Population growth rate – . Population growth rate – . (20 - 8). 10. Worldwide, there were 20 births and 8 deaths per 1,000 in 2009. Calculate the growth rate of the . Exponential Growth. (J-shaped curve). Logistic Growth. (S-shaped curve). Population ecology. Population ecology is the study of populations.. Population . = group of individuals of the same species occupying a common geographical area. 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. 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. G. rowth be Achieved under Capitalism?. Workshop: De-Growth, Zero Growth and / or Green Growth? Macroeconomic Implications of Ecological Constraints. September 23 and 24, 2021. Hansjörg Herr. Berlin School .