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Lecture 13

BIO205H5 Lecture Notes - Lecture 13: Metapopulation, Spatial Analysis, Carrying Capacity

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Christopher Richter

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BIO205 Lecture 13
Population dynamics
Populations are structured spatially
We explore what spatial characteristics influence population dynamics
Spatial models explain extinction and are important for conservation
Habitat comes in patches
Patchy habitat influences dynamics within a population
Movement is saturated in one area
Do these chipmunks belong to one population?
Subpopulation: subset of a larger population
Metapopulation: spatially separated population sets of the same species
The Rocky Mountain Parnassians butterfly population is spread across patchy habitat
What influences these patches
Why are there patches and what are some general patterns to predict what
factors are crucial to predict whether one patch is a large patch or small patch
We can use a basic model to describe metapopulation dynamics
How many available patches have animals in them?
What influences whether a patch is influenced or not?
What could increase # of occupied patches?
Animals moving in - and decreasing would be animals moving out
E = probability of extinction
C = probability of colonization (animals moving in)
Not all patches are created equally
What are some important factors to determine what patches are occupied and by
how many?
What patch characteristics might determine its likelihood to be colonized?
Size of patch
Carrying capacity
Patch isolation
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