# Does exponential growth depend on birth and death rates?

## Does exponential growth depend on birth and death rates?

In these simple models of exponential growth, birth and death rates stay the same through time, regardless of population size. They are density-independent.

**What is the relationship between birth rate death rate and growth rate?**

Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow.

**What is the relationship between birth and death rates during exponential growth and when carrying capacity is reached?**

In real populations, a growing population often overshoots its carrying capacity, and the death rate increases beyond the birth rate causing the population size to decline back to the carrying capacity or below it.

### What happens when a population has exponential growth?

In exponential growth, a population’s per capita (per individual) growth rate stays the same regardless of population size, making the population grow faster and faster as it gets larger.

**What is meant by birth rate and death rate and how do they affect the population?**

Luckily, understanding these two stats is fairly simple: birth rate refers to the number of births that occur per thousand people, per year. Similarly, death rate refers to the number of deaths per thousand people, per year.

**What causes exponential growth?**

Exponential growth is a process that increases quantity over time. It occurs when the instantaneous rate of change (that is, the derivative) of a quantity with respect to time is proportional to the quantity itself.

#### When can exponential growth occur in a population?

Exponential growth may occur in environments where there are few individuals and plentiful resources, but when the number of individuals gets large enough, resources will be depleted and the growth rate will slow down. Eventually, the growth rate will plateau or level off (Figure 1).

**Is population growth exponential or linear?**

The article I looked at claims that despite popular opinion, the global population is not growing exponentially, but rather is growing in a straight line. Exponential growth is described as the growth rate of the population, as a fraction of the population’s size, and is constant.