emily Chapter 53

emily Chapter 53 - Type I survivorship curve-humans, who...

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Chapter 53 Many populations cannot be counted due to large population size or a wide range In the mark-recapture method, individuals are marked and then let free and then re-evaluated later IMmigration-IN Clumped disperson-due to a resource, eg. a plant in one area that has lots of water and no plants in an area that lacks water; individuals have to be near each other to mate Uniform dispersion-eg. birds perched evenly spaced on a phone line Random dispersion-when dispersion isn’t really based on anything, eg. dandelions in a field; not very common Example of a cohort-students in our bio class
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Unformatted text preview: Type I survivorship curve-humans, who have lots of parental care early in life Type II survivorship curve-squirrels Type III survivorship curve-mussels, who have lots of offspring because only a few will survive Agave plant lives for many years, and its environment is very arid but not extreme. After a rain storm, the plant shoots up a stalk with its seeds and then dies. Exponential growth is limited by resources such as food and space Some populations grow past the carrying capacity and then have a high death rate to reach K...
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