Increase: Survival and Immigration Decrease: Death and Emigration
the gold rush caused a rapid increase in the population after 1851.
From Hans Rosling TED talked, how has the wordl's population. Changed since 1960,both in size and wealth?
Temperature
Population change refers to any increase or decrease in the size of a population, whereas population growth specifically refers to the overall increase in the population size over a given period, often expressed as a percentage. Population change can be influenced by factors such as births, deaths, immigration, and emigration, while population growth focuses on the net increase in population size resulting from these factors.
increase in population size
Birthrate > Death Rate
An increase in the availability of food, a decrease in predation pressure, or an improvement in reproductive success are factors that can lead to an increase in the size of an animal population.
The higher population size would also decrease. If the first level population decreased, the higher levels would have less to eat. This would cause the weaker organisms in the higher population group to die.
limiting factors
Births exceed deaths
A increase in birth rates and increase in immigration or the death rate decreases.