BIO2129 topic 8
what is discrete population growth
occurs when a species reproduces during specific intervals (like once a year), causing population growth to increase in distinct steps rather than continuously.
what is exponential population growth
is continuous reproduction where birth and death rates are occurring at all times, producing a smooth, accelerating increase in population size
what is logistic populaiton growth
when resources are limited, the population growth rate slows as density increases, eventually levelling off as the population reaches its carrying capacity. (K)
what is delayed logistic growth
includes a time lag between when the population becomes large and when the negative effects of density dependence occur. This delay causes the population to overshoot its K and often oscillates around K.
what is the abundance of species
the number of organisms
what is density
abundance per unit area
what can help predict abundance
environmental conditions and environmental factors like climate conditions, habitat types and environmental variability
in other cases population dynamics depend on
biotic interactions e.g human predation like overfishing