5.3 Population Dynamics. Population : A group of individual of the same species living in a defined area that have the potential to interbreed and produce fertile offspring. IB 5.3 Assessment Statements.
Population: A group of individual of the same species living in a defined area
that have the potential to interbreed and produce fertile offspring.
5.3.1 Outline how population size is affected by natality,
immigration, mortality, and emigration.
5.3.2 Draw and label a graph showing a sigmoid (S-shaped)
population growth curve.
5.3.3 Explain the reasons for the exponential growth phase, the
plateau phase, and the transitional phase between these
5.3.4 List three factors that set limits to population increase.
In ecosystems, population sizes fluctuate (change) over time for a variety of reasons:
1. Natality: Birth Rate
2. Mortality: Death Rate
3. Immigration: Members arriving from other places.
4. Emigration: Members leave the population.
Density independent and Density dependent variables can affect population sizes in addition to the aforementioned factors.
What’s the difference?
add labels to a diagram.
An illustration of the power of exponential growth
Populations cannot continue to grow and grow forever. Population numbers will eventually stabilize.
Carrying Capacity (K): The maximum number of individuals that
a particular habitat can support.
Limiting Factors: Those factors in an environment/
ecosystem that set limits to population growth.
Examples of limiting factors for ANIMAL populations
Examples of limiting factors for PLANT populations