01:119:115 Lecture Notes - Lecture 29: Exponential Growth, Resistance 2, Natural Selection

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: G Transue

Document Summary

Individuals within populations : share gene pool, affected by selection, drift, etc. b) (1) rely on & compete for same resources (2) influenced by similar environmental factors. Study of change in populations: population ecology: population dynamics, population dynamics: , population size: (1) # of individuals (2) meaningful only when considered within specific areas, population density: . = n(b-m) (c) r (per capita rate of increase) (d) n/ t : possible situations r= b-m. = rn (i) (1) if r > 0 (cid:314) population growing (2) if r < 0 (cid:314)population shrinking (3) if r = 0 (cid:314) no net change. Instead of finding the linear relation, find the instantaneous. (n) = instantaneous change in population size a: dn/dt=r inst n (1) r inst (2) r inst . = r max: j-shaped curve, you can have periods of exponential growth but will always hit. [(k-n)/k] (cid:314) reflects slowed growth as n approaches k. Ays in which organisms maximize survival & reproduction.