Lect. 11 pop dynamics web

Lect. 11 pop dynamics web - Population Dynamics How are...

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Population Dynamics How are populations changing over time? ( or or  ) Why are they changing? 1. Individuals are either moving in (immigration) or moving out (emigration) = dispersing 2. Birth rates – Death rates = +,-, or 0
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Rapid Changes in Response to Climate Change 16,000 years ago climate warmed = great northward migration. Preserved pollen in lake sediments. Moved into newly suitable climate. Would this be immigration or emigration?
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Metapopulations linked by dispersal Metapopulation = subpopulations connected by reliable exchange of individuals. Help maintain healthy genetic diversity… Depend on access via corridors Do you think these guys move faster or slower than trees?
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Population Dynamics How are populations changing over time? ( or or  ) Why are they changing? 1. Individuals are either moving in (immigration) or moving out (emigration) = dispersing 2. Birth rates – Death rates = +,-, or 0
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Age Distributions reflect survival history Age distribution = # of individuals in different age groups
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Lect. 11 pop dynamics web - Population Dynamics How are...

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