From a sample of a population, the properties of the population can be inferred.
Increase: Survival and Immigration Decrease: Death and Emigration
the gold rush caused a rapid increase in the population after 1851.
Temperature
Platonic
increase in population size
Let's put it this way. Say you have a killerwhale and a penguin. Killerwhales are major predators to penguins. Now, say the killerwhale population increases. The penguins would be eaten more by the killerwhales, then causing a population decrease for the penguins. If the population decreases, they're won't be enough penguins, and they most likely will become extinct, as well as causing a population decrease for the killerwhales as well. Whereas, vis versa, they're were a killerwhale population decrease. The penguins would be less hunted, therefore, creating a population increase for the penguins.
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.
Increased immigration can lead to a larger population by adding more individuals to the existing population. This can result in higher birth rates due to increased availability of potential partners and greater genetic diversity.
limiting factors
Births exceed deaths
The biological term for the inherent ability of a population to increase in size is "biotic potential." It refers to the maximum reproductive capacity of a population under ideal environmental conditions, including factors such as birth rate, death rate, and age at first reproduction.