logging in or signing up Populations dantescience Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 277 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: April 19, 2010 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: pragya_12 (17 month(s) ago) please lemme download it Saving..... Post Reply Close Saving..... Edit Comment Close By: pragya_12 (17 month(s) ago) AWESUM Saving..... Post Reply Close Saving..... Edit Comment Close By: laxmi009 (24 month(s) ago) i realy need this thanks alot it will help me out Saving..... Post Reply Close Saving..... Edit Comment Close By: laxmi009 (24 month(s) ago) i realy need this thanks alot it will help me out Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript POPULATIONS : POPULATIONS 1 M.BREGAR (Dante C.S.S.) What is “Population Size”? : What is “Population Size”? Total number of 1 species in an ecosystem. You can select the ecosystem Example: Population of people in Dante Population of people in Toronto 2 M.BREGAR (Dante C.S.S.) What is a Population? : What is a Population? An ecosystem is made of several populations: Imagine High Park: 3 M.BREGAR (Dante C.S.S.) Slide 4: 4 M.BREGAR (Dante C.S.S.) Populations : Populations M.BREGAR (Dante C.S.S.) 5 Population Growth : Population Growth The rate at which a population size changes. Populations can increases or decrease, but most populations remain stable 6 M.BREGAR (Dante C.S.S.) World Population Growth : World Population Growth 7 M.BREGAR (Dante C.S.S.) Factors Controlling Population Growth : Factors Controlling Population Growth Natality Number of births Immigration Individuals entering an ecosystem Mortality Number of deaths from diseases, being eaten, etc. Emigration Individuals leaving an ecosystem Population Increases Population Decreases 8 M.BREGAR (Dante C.S.S.) Factors Controlling Population Growth : Factors Controlling Population Growth M.BREGAR (Dante C.S.S.) 9 Factors Controlling Population Growth : Factors Controlling Population Growth To measure if how a population grows, we calculate population growth using the following formula: POPULATIONGROWTH = (NATALITY + IMMIGRATION) – (MORTALITY + EMIGRATION) Population Increases Population Decreases 10 M.BREGAR (Dante C.S.S.) Closed Population : Closed Population These are populations in which individuals can NOT enter (immigration) or leave (emigration) Populations change because of births and deaths. Example – Zoo or Fishtank 11 M.BREGAR (Dante C.S.S.) Open Populations : Open Populations These are populations affected by all four factors (birth, death, immigration, and emmigration) Example – natural ecosystem, park 12 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms These provide information about the number of people at different ages Allow us to decide if a population is growing, stable, or on the decline. 13 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Growing Populations More individuals at younger ages Shaped like a pyramid, with a wide base 14 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Stable Populations About the same number of individuals at every age Straight shaped 15 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Declining Populations Wider portions found toward the middle of the population Smaller base 16 M.BREGAR (Dante C.S.S.) J-Curve : J-Curve A population with unlimited resources grows in the form of a J-Curve In the natural world, J-Curve does not occur because resources are LIMITED 17 M.BREGAR (Dante C.S.S.) Human Population Growth : Human Population Growth M.BREGAR (Dante C.S.S.) 18 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Populations dantescience Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 277 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: April 19, 2010 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: pragya_12 (17 month(s) ago) please lemme download it Saving..... Post Reply Close Saving..... Edit Comment Close By: pragya_12 (17 month(s) ago) AWESUM Saving..... Post Reply Close Saving..... Edit Comment Close By: laxmi009 (24 month(s) ago) i realy need this thanks alot it will help me out Saving..... Post Reply Close Saving..... Edit Comment Close By: laxmi009 (24 month(s) ago) i realy need this thanks alot it will help me out Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript POPULATIONS : POPULATIONS 1 M.BREGAR (Dante C.S.S.) What is “Population Size”? : What is “Population Size”? Total number of 1 species in an ecosystem. You can select the ecosystem Example: Population of people in Dante Population of people in Toronto 2 M.BREGAR (Dante C.S.S.) What is a Population? : What is a Population? An ecosystem is made of several populations: Imagine High Park: 3 M.BREGAR (Dante C.S.S.) Slide 4: 4 M.BREGAR (Dante C.S.S.) Populations : Populations M.BREGAR (Dante C.S.S.) 5 Population Growth : Population Growth The rate at which a population size changes. Populations can increases or decrease, but most populations remain stable 6 M.BREGAR (Dante C.S.S.) World Population Growth : World Population Growth 7 M.BREGAR (Dante C.S.S.) Factors Controlling Population Growth : Factors Controlling Population Growth Natality Number of births Immigration Individuals entering an ecosystem Mortality Number of deaths from diseases, being eaten, etc. Emigration Individuals leaving an ecosystem Population Increases Population Decreases 8 M.BREGAR (Dante C.S.S.) Factors Controlling Population Growth : Factors Controlling Population Growth M.BREGAR (Dante C.S.S.) 9 Factors Controlling Population Growth : Factors Controlling Population Growth To measure if how a population grows, we calculate population growth using the following formula: POPULATIONGROWTH = (NATALITY + IMMIGRATION) – (MORTALITY + EMIGRATION) Population Increases Population Decreases 10 M.BREGAR (Dante C.S.S.) Closed Population : Closed Population These are populations in which individuals can NOT enter (immigration) or leave (emigration) Populations change because of births and deaths. Example – Zoo or Fishtank 11 M.BREGAR (Dante C.S.S.) Open Populations : Open Populations These are populations affected by all four factors (birth, death, immigration, and emmigration) Example – natural ecosystem, park 12 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms These provide information about the number of people at different ages Allow us to decide if a population is growing, stable, or on the decline. 13 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Growing Populations More individuals at younger ages Shaped like a pyramid, with a wide base 14 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Stable Populations About the same number of individuals at every age Straight shaped 15 M.BREGAR (Dante C.S.S.) Population Histograms : Population Histograms Declining Populations Wider portions found toward the middle of the population Smaller base 16 M.BREGAR (Dante C.S.S.) J-Curve : J-Curve A population with unlimited resources grows in the form of a J-Curve In the natural world, J-Curve does not occur because resources are LIMITED 17 M.BREGAR (Dante C.S.S.) Human Population Growth : Human Population Growth M.BREGAR (Dante C.S.S.) 18