BIOL 202 Lecture Notes - Lecture 18: California Quail, Exponential Growth, Time Point
8 Apr 2017
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Document Summary
Use geometric growth model- species that breed single point in time (tree frogs) Use exponential- species that breeds continuously (humans) We see spurts in population growth througout years. If plotted geometric growth onto this line, it would be the red dots. Pulse of increase in population numbers as opposed to continuous increase in numbers. A population can grow forever (become infinitely large in population size) This is never true because eventually we hit our caring capacity. There are some instances where modeling exponential or geometric growth is useful in a short term. When a population starts with low population numbers (if recovering or introduced to a new environment), then the population can seem exponential or geometric. Reindeer population that was introduced to st. paul island in 1910: Reindeer population grew exponentially for first 25 years (started with very small population) Whooping cranes decreased to population size of just 15 individuals in 1940s:
