Measuring Growth Flashcards
1
Q
Density (Dp)
A
the number of individuals in a given unit of area (land) or volume (air or water)
Dp = N/A or Dp = N/V
2
Q
Growth rate (gr)
A
the change in the number of individuals in a unit of time
gr = ΔN/Δt = (final pop - initial pop)/change in time
3
Q
Per capita growth rate
A
the rate of change per individual
cgr = ΔN/N or
cgr = (Nfinal - Ninitial)/Ninitial
cgr can also be positive or negative depending on whether the initial N is
4
Q
Clumped distribution
A
organisms grouped together; occurs in highly competitive environments
5
Q
Random distribution
A
no pattern exists in organism distribution; occurs in environments with little competition
