BIS 2B Lecture Notes - Lecture 6: Exponential Growth, Logistic Function, Negative Number

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

Document Summary

Population: number of individuals of the same species in a given time and place (from a evolutionary standpoint: interbreeding) Population density: number of individuals per unit area. Number of individuals in a population (n) Factors influencing whether populations grow or shrink. Exponential growth and how we write that mathematically. Population demography population dynamics smaller, or even go extinct (cid:840)how n is changing through time(cid:841) : we want to be able to predict if a population will grow, stay the same, get. = # of emigrants (cid:840)decreases population si e thru dispersal(cid:841) I(cid:300) o(cid:300)e locatio(cid:300), i. e. a local but open population. Open population: population in addition to births and deaths. Numbers change due to immigration and emigration from outside the. : numbers change only due to births and deaths. N t+1 = n t + b - d + i - e.