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POPULATION ECOLOGY

POPULATION ECOLOGY.  Kathy DeWet-Oleson / NOAA. Steve Lonhart / NOAA MBNMS . Steve Lonhart / NOAA MBNMS . LEVELS OF ECOLOGY. Population = all the individuals of a species that live in the same area. M/Y/D/S Animal Graphics. POPULATION SIZE. Steve Choy / NOAA MBNMS. CA Fish & Game.

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POPULATION ECOLOGY

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  1. POPULATION ECOLOGY  Kathy DeWet-Oleson / NOAA Steve Lonhart / NOAA MBNMS  Steve Lonhart / NOAA MBNMS 

  2. LEVELS OF ECOLOGY Population = all the individuals of a species that live in the same area M/Y/D/S Animal Graphics

  3. POPULATION SIZE Steve Choy / NOAA MBNMS CA Fish & Game I E How does population size change? Births Deaths Immigration Emigration

  4. POPULATION SIZE + - + - Steve Choy / NOAA MBNMS CA Fish & Game Nt+1= NtBDIE

  5. POPULATION SIZE + Nt+1= NtBDIE - + - 2,813 +328 – 430 + 0 - 0 = 2,711 Information from Otter Project & USGS Scientists observed 2,813 sea otters along the Central Coast in 2009. 430 otters died and 328 pups were born. If there is no immigration or emigration, how many sea otters were there in 2010?

  6. POPULATION SIZE + Nt+1= NtBDIE - + - 2,711+2-10=2,703 If 10 sea otters leave the Central Coast population and 2 enter, what would the 2010 population be?

  7. POPULATION SIZE Steve Choy / NOAA MBNMS US Geological Survey

  8. POPULATION GROWTH

  9. POPULATION GROWTH Exponential Growth Population Size Time

  10. POPULATION GROWTH Why don’t populations usually grow exponentially? Limited resources – light, water, nutrients, food, space Disease Predation

  11. POPULATION GROWTH Exponential Growth Carrying Capacity K Population Size Logistic Growth Time

  12. POPULATION GROWTH Carrying capacity Elephant Seals Number of pups born Year Photos by Kristin McCully http://www.nmfs.noaa.gov/pr/pdfs/sars/po2007sene-ca.pdf

  13. ACTIVITY Map of Average Annual Population Growth Rate, 1980-1998 (http://www.worldbank.org/depweb/english/modules/social/pgr/)

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