Topic 8.3 - Population Ecology 𖦹⋆｡°✩ Flashcards
what does the size of populations largely depend on
depends on upon availability of resources
how does food less food energy affect a population
༻ population decreases
༻ reproduction rates decrease
༻ offspring survivability decreases
what happens to a population when food is readily available
༻ reproduction rates increase
༻ more food for offspring
༻ survival rates increase
what do species have that aid in survival when energy availability changes and provide examples
different species have adaptations
༻ storage of fat during winter months
༻ losing/growing leaves during different seasons
༻ migrating in response to changes in food availability
what factors can affect population growth
༻ age at reproductive maturity
༻ number of offspring produced
༻ frequency of reproduction
༻ survivorship of offspring to reproductive maturity
✩POPULATION GROWTH EQUATION✩
what is exponential growth
a sharp increase in the growth of a population
when does exponential growth occur
under ideal conditions when resources are abundant
what happens to a population experiencing exponential growth
༻ the number of organisms added in each generation increases as the population gets larger
༻ more individuals are reproducing
༻ rate of offspring production stays the same
what does an exponential growth graph look like
represented as a J-shaped curve
✩EXPONENTIAL GROWTH EQUATION✩
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