BIS 2B Lecture Notes - Lecture 8: Resource Depletion, Paramecium, Carrying Capacity

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: Mark Schwartz; Sharon Strauss

Document Summary

Population= number of individuals in a given area and time with interbreeding. Population density = number of individuals per unit area. B = # of births (increases population size) D= # of deaths (decreases population size) I = # immigrants (increases population size) E = # emigrants (decreases population size through dispersal) N t+1 = nt + b - d + i - e. Exponential or geometric: the per individual or per-capita growth rate is constant or density independent. No matter the size of the population, the birth and death rate is constant. The growth rate is not dependent on population size. B-d = (birth rate - death rate) = the instantaneous rate of increase. Lets call this r, the intrinsic growth rate of the population, or intrinsic rate of increase. Dn/dt = rn (not great for prediction) Integrate from 0 to time t to predict population size at time t: Intuitively, a population increases in size when .