# AP Bio 53

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1. population
a group of individuals of a single species living in the same general area
2. the density of a population
is the number of individuals per unit area or volume(aka water living things)
3. Dispersion
is the pattern of spacing among individuals within the boundaries of the population
4. what are the 4 ways # of population can change
Birth, Death (mortality), Immigration, and emigration (going away)
5. territoriality
the defense of a bounded physical space against encroachment by other individuals
6. Demography
the study of the vital statistics of populations and how they change over time
7. life tables
age-specific summaries of the survival pattern of a population
8. cohort
a group of individuals of the same age
9. survivorship curve
• a graphic method of representing some of the data in a life table. it is a plot of the proportion or number in a cohort still alive at each age
10. reproductive table(fertility schedule)
is an age specific summary of the reproductive rates in a population
11. what does N t  ^N and ^t represent
population size, time, change in population size, and the time interval over which we are evaluating population growth.
12. what does B and D repreasent
births in a population and deaths in a population
13. equation for change in population size in a given time
14. per capita death rate (symbolized by m) and equation
an ables us to calculate the expected number of deaths per unit time in a population of any size. D=mN per year
15. per capita birth rate (symbolized by b) and equation
the number of offspring produced per unit time by average member of the population. B=bN per year
16. population growth equation using per capita birth and death
17. per capita rate of increase or r
r=b-m
18. Zero population growth (ZPG)
occurs when the per capita birth and death rates are equal (r=0)
19. exponential population growth
also shown a  or  extra credit question? Which on of the equations above will grow faster? (page 1177)
20. carrying capacity
symbolized by as the maximum population size that a particular environment can sustain
21. logistic population growth model def and equation
the per capita rate of increase approaches zero as the carrying capacity is reached
22. Allee affect (named after W.C. Allee of the University of Chicago who first described it)
in which individuals may have a more difficalt time surviving or reproducing if the population size is too small
23. life history def
the traits that affect an organism's schedule of reproduction and survival
24. life history's 3 main variables
when reproduction begins, how often the organism reproduces, and how many offspring are produced per reproductive epsiode
25. semelparity
"one-shot" pattern of big-bang reproduction examples of speacies that do this is the Pacific salmon and seasonal plants
26. iteroparity
repeated reproduction aka US this spiecise tipicaly care for their young
27. K-selection
selection traits that are sensitive to population density and are favored at high densities or density-dependent (close to carrying capasity)
28. r-selection
selection for traits that maximize reproductive success in uncrowded environments or density-independent (below carrying capacity)
29. density independent
a birth rate or death rate that does NOT change with population size or density
30. density dependent
a death rate that rises as population density rises as is a birth rate that falls with rising density
31. Mechanisms of Density Depedent regulations
see page 1183 cause i'm lazy
32. population dynamics
population fluctuations from year to year or place to place are influenced by many factors and in turn affect other species including our own
33. demographic transition
the movement from high birth and death rates toward low birth and death rates
 Author: doctorwhogirl998 ID: 169445 Card Set: AP Bio 53 Updated: 2012-09-08 16:25:17 Tags: AP Bio 53 Folders: Description: AP Bio chapter 53 Show Answers: