BIOL 111 Lecture Notes - Lecture 5: Generation Time, Carrying Capacity, Song Sparrow
Document Summary
Readings: chapter 19: 406-411; lester brown interview world in the balance linked in week 5. Midterm friday oct 9th from 12:00 to 12:50 in your normal lecture room. Individuals of the same species living in the same geographic area at the same time. The rate at which populations grow is determined by 4 key factors: The younger the age of the parents when they reproduce . Individuals with more resources for growth (and reproduction) . can delay reproduction and spend more time growing eg long-lived trees. Individuals with few resources are less healthy . increases death rate . and they have less energy for birthing healthy offspring. If resources are limiting . organisms may put available resources into reproduction and then die shortly afterward (big-bang reproduction eg weedy plants) Effect on population size increase decrease increase decrease. We should consider the typical pattern of growth and reproduction for an individual species first (its life history) and then consider the available resources second.
