REM 311 Chapter Notes - Chapter 3: Exponential Growth, Density Dependence, Equilibrium Point
13 Apr 2018
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Available resources shared unequally -> certain individuals receive enough resources for survival & reproduction at the expense of others. Recruitment curve curve reaches certain level and remains there (unlike contest where it"s a hump & drop) No matter how high population density is, population in the next time step will not be below carrying capacity (not decline) -> continuously competing with others. Exponential growth in n until carrying capacity and remains at that level. Stabilizes around the carrying capacity -> acts as population ceiling: population cannot surpass k by a lot, population may be pushed below k frequently. Summary: 3 types of density dependence share common characteristic. N growth rate declines with increasing density (regular) N growth rate declines with decreasing density (inverse) -> allee effect. Factors that cause growth rate ( r ) of a small n to decrease as n decreases are allee.
