a reduction in competition
I'd also add:
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.
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 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.
An increase in predation pressure or a decrease in food availability are factors most likely to result in a decrease in the size of a specific population. These factors can lead to increased mortality rates and reduced reproductive success, ultimately causing the population to decline in numbers.
The population size of predator species is typically controlled by the availability of prey, competition with other predators, and environmental factors like habitat and climate. The population size can fluctuate based on these factors, leading to dynamic predator-prey relationships.
Increase: Survival and Immigration Decrease: Death and Emigration
limiting factors
Temperature
the main ones are birth and death
Limiting factors whose effects increase as the size of the population increases are known as density-dependent factors. Competition is an example of a density-dependent limiting factor.
A increase in birth rates and increase in immigration or the death rate decreases.
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.
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.
Environmental factors such as food availability, habitat quality, predation, diseases, and climate can be limiting factors that are not controlled by the size of a population. These factors can impact population growth and survival independent of the population size.
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.
the gold rush caused a rapid increase in the population after 1851.
An increase in predation pressure or a decrease in food availability are factors most likely to result in a decrease in the size of a specific population. These factors can lead to increased mortality rates and reduced reproductive success, ultimately causing the population to decline in numbers.