population dynamics Flashcards
what is population
a group of organisms living in a certain area
density def
number of individuals in a given area
measuring population
size density biomass and composition
r selection
reproduce and colonies quick
rapid increase and decline
carrying capacity
max population that can be supported
k selection
controlled slower growth need constant predictable conditions
composition def
the amount of measurable characteristics in a population/environment
distribution types
clumped: groups of individuals
uniform: individuals evenly spaced
random: irregular spacing
density equation
total individuals/ (area x number of quadrants)
population growth equations
(br - im) - (dr - em)
arial photography
drone takes photos to directly observe
quadrants
fame used to mark an area to sample non moving organisms
transects
a line through an area to determine changes in community composition
radio tracking
determining info from signals from devices attached to animals
gps
tracking animals via a satalite
biological population control
a biological agent is used to control a population
general and specialised predators
parasites and microbial diseases
chemical population control
the use of pesticides and other chemicals to control populations
culling
removing and killing organisms to control their population
reintroduced populations
breeding organisms in captivity to reintroduce into the environment
