What factors influence population trends? Population growth rate is affected by
birth rates, death rates, immigration, and emigration
. If a population is given unlimited amounts of food, moisture, and oxygen, and other environmental factors, it will show exponential growth.
What are the five causes of population growth?
- Falling Mortality Rate. The primary (and perhaps most obvious) cause of population growth is an imbalance between births and deaths. …
- Underutilized Contraception. …
- Lack of Female Education. …
- Ecological Degradation. …
- Increased Conflicts. …
- Higher Risk of Disasters and Pandemics.
What are the 3 types of population growth?
- An exponential growth pattern (J curve) occurs in an ideal, unlimited environment.
- A logistic growth pattern (S curve) occurs when environmental pressures slow the rate of growth.
What are the five factors that affect population?
- Age of organisms at first reproduction.
- How often an organism reproduces.
- The number of offspring of an organism.
- The presence or absence of parental care.
- How long an organism is able to reproduce.
- The death rate of offspring.
What are the 6 factors that affect population size?
- Economic development. …
- Education. …
- Quality of children. …
- Welfare payments/State pensions. …
- Social and cultural factors. …
- Availability of family planning. …
- Female labour market participation. …
- Death rates – Level of medical provision.
The two factors that increase the size of a population are
natality, which is the number of individuals that are added to the population over a period of time due to reproduction, and immigration, which is the migration of an individual into a place
.
Several factors are responsible for the rapid growth:
a drop in mortality rates, a young population, improved standards of living, and attitudes and practices which favor high fertility
.
This rapid growth increase was mainly caused by a
decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age
. By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.
Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size.
With a positive relationship, these limiting factors increase with the size of the population and limit growth as population size increases
.
1. What factors contribute to the increase/decrease of a population? Abiotic factors (temperature, water, sunlight, nutrients in soil), biotic factors (predators, prey, competitors, predators, parasites, disease, etc.), and intrinsic factors (adaptations) affect the population size.
- Age of organisms at first reproduction.
- How often an organism reproduces.
- The number of offspring of an organism.
- The presence or absence of parental care.
- How long an organism is able to reproduce.
- The death rate of offspring.
Factors affecting populations. Populations are affected by many factors, the main natural ones being
birth rates and death rates
which affect the level of natural change (increase or decrease) within the population.
