Flashcards in Limits To Population Growth Deck (12)
What is intraspecific competition?
Within members of the same species
What is the carrying capacity (K)?
The upper sustainable limit of a population, if it goes beyond the carrying capacity then the population becomes unstable
Describe the 4 key characteristics of intraspecific competition described by Begon et al. (1996):
1. There’s decreased contribution of individuals to subsequent generations
2. The resource they’re competing for must be in limiting supply
3. Reciprocity must be present- those competing are essentially the same
4. It is density dependent
Give an example of decreased contribution to subsequent generations:
Song sparrows on mandarte island
The higher the number of breeding females in the island, the lower the number of offspring
Give an example of where reciprocity may not be present
Many bird of prey chicks because there is usually a runt
Arizona Spadefoot toads: have an omnivorous and carnivorous morph to reduce competition
What is intraspecific competition closely linked with?
What is the equilibrium level also known as?
Carrying capacity (K)
What usually happens to population numbers around the carrying capacity?
What other factors can affect density dependence?
Competition for food, space etc.
What symbol is used to represent reproduction rate when working out population growth?
How can you calculate the carrying capacity of a population using a graph?
Where birth rate and death rate meet on the graph is the carrying capacity