2.1 bio Flashcards
(13 cards)
Population
a group of individuals of the same species in the same area at the same time.
Population density
The number of individuals/ 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
Clumped spacing
A certain fish species tends to gather in large groups to avoid being singled out and eaten by predators
random spacing
The seeds of a plant species are distributed by wind in a field where conditions are uniform
uniform spacing
Resources are scarce and as a result species are very territorial
why clumped
Due to resource location or social behavior
why random
positions of independent of other individuals
why uniform
put in that position ex) apple orchard
Population density formula
Number of individuals/ unit area
Random sample formula
area of sample
=
total # of organisms
—————————-
total area
Mark and recapture formula
of organisms total # of recapture
——————– = ————————-
total marked # recapture w/marks
