BIOE 370 1st Edition Lecture 19Outline of Last Lecture II. Population DynamicsIII. Population Growth ModelsOutline of Current Lecture IV. Density-dependent population growthV. Verhulst-Pearl Model Current LectureSerengeti Wildebeest: Density-dependent population growth- Annual migration driven by rainfall and resource availability in Serengeti National Park- Dry season vegetation type = long grass & open woodland- Wet season vegetation type = short grass plains (productivity, nutrients) - Synchronized birth pulse, precocial offspring (can run within minutes of birth)- RPV Virus – evolved outside of Africa, Italian army brought the virus in to Africa with cattle and many ungulates died o Is a morbilivirus that only affects ruminants (so didn’t affect zebra, but killed a lot of wildebeests) - Carrying capacity: the population that the resources available can sustain - K=fn(Rain) carrying capacity of Serengeti Wildebeests Verhulst-Pearl Model- Logistic population growth- Density dependent population growth- Intraspecific competition for resources (as competition increases, growth rate slows down)As N rises, pop growth slows (1) Due to increases competition for resources
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