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What happens to population when the death rate is very close to the birth rate?
It achieves what used to be called "ZPG" - zero population growth. Births and deaths are essentially equal. The population sustains itself where it is, but does not grow or shrink.
How is population size in an ecosystem determined by the relative rates of birth immigration emigration and death?
Birth and immigration both add individuals to a population, increasing the population size. Similarly, deaths and emigration remove individuals, reducing the population. So growth would be equal to the sum of immigration and births, minus the sum of emigration and deaths.
What does it mean if a population is in equilibrium?
The birth rate and the Death rate are equal, providing there is no immigration/emigration of the population.
Assuming that other factors are equal how are the birthrate and death rate related in a stable population?
In a stable population, the birthrate and death rate are closely related as they tend to be balanced. When the birthrate equals the death rate, the population remains relatively constant over time, neither growing nor shrinking. If the birthrate exceeds the death rate, the population will increase, while if the death rate surpasses the birthrate, the population will decline. This balance is essential for maintaining a stable demographic structure.
Does birth and death rates remain constant in a population in a dynamic balance?
In a dynamic balance, birth and death rates do not remain constant; they fluctuate based on various factors such as environmental conditions, resource availability, and social dynamics. While a population may reach a stable equilibrium where births roughly equal deaths over time, the rates can change due to external influences like disease outbreaks, changes in food supply, or migration patterns. Thus, while a balance may be observed, it is dynamic and subject to continuous change.
What happens as the population decreases?
As a population decreases the death rate is higher or equal to the birthrate.
What happens to population when the death rate is very close to the birth rate?
It achieves what used to be called "ZPG" - zero population growth. Births and deaths are essentially equal. The population sustains itself where it is, but does not grow or shrink.
When does a population not change?
When the death toll and birth rate of people are equal around the world.
What will happen to population size if the birth rate and the death rate are equal?
It doesn't change.
What is the stationarity population in population study?
In demographics stationary population is when the death rate and birth rate are equal therefore the population is neither decreasing or increasing but it is stationary.
What is the model of population growth that states the growth rate remains constant because birth and death rates are equal?
The model of population growth that states the growth rate remains constant because birth and death rates are equal is called zero population growth or ZPG. In this scenario, the population size does not increase or decrease over time due to the balance between births and deaths.
What are the three types of population pyramids?
Expansive population pyramid: wide base and narrow top, indicating high birth and death rates. Constrictive population pyramid: narrow base and wider top, showing low birth and death rates. Stationary population pyramid: nearly equal widths at all age groups, suggesting stable birth and death rates.
Comparison between crude birth rate and death birth rate?
simple thing.. no of death is equal to 4 times larger than the no of birth....
How is population size in an ecosystem determined by the relative rates of birth immigration emigration and death?
Birth and immigration both add individuals to a population, increasing the population size. Similarly, deaths and emigration remove individuals, reducing the population. So growth would be equal to the sum of immigration and births, minus the sum of emigration and deaths.
What must be true for a population to remain constant over time?
For a population to remain constant over time, the birth rate must equal the death rate, ensuring that the number of individuals being born is equal to the number of individuals dying. Additionally, there should be no migration in or out of the population, as this can also impact population size.
What does it mean if a population is in equilibrium?
The birth rate and the Death rate are equal, providing there is no immigration/emigration of the population.
Zero population growth can be achieved when?
When the death rate and the birth rate are equal. This basically means that the amount of people that are dying are being replaced by babies being born. But no extra babies are being born so there is no population growth.
