2.1 Flashcards
Random sampling would work BEST if populations are in what distribution?
uniform
population density
of individuals in an area
population size
the total amount of individuals in a population
population distribution
the pattern in which organisms of a population are spread throughout the range
Uniform dispersion
Resources are scarce and as a result species are very territorial
Clumped dispersion
species tends to gather in large groups due to clumped resources or to avoid predators
Random dispersion
The seeds of a plant species are distributed by wind in a field where conditions are uniform
One night, you trap 40 mice, mark them, and let them go. Two nights later, you again trap 40 mice, and 19 of them are marked. What is the total number of mice in the meadow?
84
random sampling formula
amount of individuals counted/area of sample=total amount of individuals/total area
mark and recapture formula
total marked/ total individuals=found marked in recapture/total captured
population density formula
of individuals/ area or volume occupied
difference between pop density and pop distribution
density finds the areas amount but distribution finds the pattern
elephants travel in herds so they will distribute…
clumped
a trees seeds are blown by the wind so they will distribute…
random
penguins with scarce resources and lots of competition will distribute…
uniform
