Changes in Populations and Population Dynamics Flashcards
What is a population dynamic?
It is the measurement of the size of the population over time and the factors that can be considered that cause the changes to occur.
What are the four main factors that cause changes in a population?
- Births
- Deaths
- Immigration
- Emigration
What factors determine if a population will rise or fall?
A stable food supply
Animals free from disease
Good ratio of males to females
A large proportion of males and females of breeding age
Availability of habitat (feeding, breeding and nesting areas)
Good weather conditions
Define the term ‘metapopulations’.
A group of populations separated by space but consist of the same species.
Define the term ‘seasonality’.
A characteristic of time in which there are regular and predictable changes that repeat over a one year period.
Define the term ‘growth’.
The increase in a number of individuals in a populations
Define the term ‘dissolution’.
When a breeding pair or a group of animals no longer interact with each other
Define the term ‘dispersal’.
Movement from the birthing site to a breeding site or the movement from one breeding site to another
Define the term ‘genetic variability’.
The likelihood of different genetic characteristics existing within a population
Define the term ‘continuity of time’.
A habitat or population with a long uninterrupted presence
Define the term ‘fecundity’.
The fertility within a population and its ability to create an abundance of offspring
Define the term ‘natality’.
The birth rate of a population in comparison to the size of the population
Define the term ‘mortality’.
Death rate, measured by the number of deaths due to a specific cause
Define the term ‘population shift’.
A change in the relative numbers of the different groups of individuals making up a population
Define the term ‘demes’.
A group of individuals that belongs to the same taxonomic group
