PPT-Population Growth Factors When Studying Populations

Size 2 Density 3 Growth rate 4 Survivorship 5 Age structure Each population has a density a dispersion and a reproductive strategy Populations Population density is a measurement of the number of individuals living in a defined space. April. . 18th/2012. Adapted. . from. : . Taylor, S. (. 2010). . . Populations (Presentation. ). . Science Video Resources. . [Online] . Wordpress. . Retrieved from . http://. i-biology.net/ibdpbio/populations/. https://. www.youtube.com/watch?v=PXiO1JMo5F4&index=11&list=PL2AyX6LWJkplnbmhZ1Km6bg3kdwGT3fVj. https://. www.youtube.com/watch?v=XnaC9iOumVA. https://www.youtube.com/watch?v=U10PSZETLY0. . . 8. . POPULATION ECOLOGY. THE WOLF WATCHERS. Endangered gray wolves return to the American West. . THE . WOLF WATCHERS. . . Endangered . gray wolves return to the American West. Rates That Affect Population Size. Natality-. the birth rate; the number of births over time. Mortality-. the death rate; the number of deaths over time. Rates That Affect Population Size. Immigration-. April. . 18th/2012. Adapted. . from. : . Taylor, S. (. 2010). . . Populations (Presentation. ). . Science Video Resources. . [Online] . Wordpress. . Retrieved from . http://. i-biology.net/ibdpbio/populations/. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . Bell Work. Students will address how populations are distributed.. Students will describe how populations are sustained over time.. Today’s Objectives. Describing Populations. Geographic range- . the area inhabited by a population. April. . 18th/2012. Adapted. . from. : . Taylor, S. (. 2010). . . Populations (Presentation. ). . Science Video Resources. . [Online] . Wordpress. . Retrieved from . http://. i-biology.net/ibdpbio/populations/. 3.. A . population. is a group of individuals of the same species living in an . area. Distribution Patterns. Uniform . distribution . results from intense competition or antagonism between individuals. A . population. . is a group of organisms of the . same. species that live in a specific geographical area and . interbreed. .. A population is a . reproductive. group because organisms usually breed with members of . 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. Factors. Remember, primary productivity of an ecosystem can be reduced by limiting nutrients. Limiting . factors can . determine carry capacity. Density Dependent Factors. Density Independent Factors. 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. Nicole . Tunbridge. and. Kathleen Fitzpatrick. Turtle Tracks. Population ecology explores how biotic and abiotic factors influence density, distribution, size, and age structure of populations. For example, the number of loggerhead turtle hatchlings that survive their first journey to the ocean is affected by both biotic and abiotic factors.