# What does the logistic growth model describe?

## What does the logistic growth model describe?

In logistic growth, a population’s per capita growth rate gets smaller and smaller as population size approaches a maximum imposed by limited resources in the environment, known as the carrying capacity ( K). Exponential growth produces a J-shaped curve, while logistic growth produces an S-shaped curve.

### What shape does a logistic growth pattern take?

S-shaped curve

As competition increases and resources become increasingly scarce, populations reach the carrying capacity (K) of their environment, causing their growth rate to slow nearly to zero. This produces an S-shaped curve of population growth known as the logistic curve (right).

#### How do you calculate logistic growth?

We use the variable K to denote the carrying capacity. The growth rate is represented by the variable r. Using these variables, we can define the logistic differential equation. dPdt=rP(1−PK).

**What are the 3 phases of logistic growth in order?**

The growth curve of a population growing according to logistic growth is typically characterized by three phases: an initial establishment phase in which growth is slow, a rapid expansion phase in which the population grows relatively quickly, and a a long entrenchment stage in which the population is close to its …

**What does J shaped curve indicate?**

A J-curve is a trendline that shows an initial loss immediately followed by a dramatic gain. In a chart, this pattern of activity would follow the shape of a capital “J”.

## How many phases does logistic growth have?

The four phases of such growth (Initiation/Birth, Acceleration/Growth, Deceleration/Maturing, Saturation) can be seen in the logistic growth curve at right.

### What is the effect of logistic growth phase 1?

In the first phase, the population growth rate increases. In the second phase, the growth rate decreases and eventually reaches 0. The image below contrasts exponential growth (no carrying capacity) and logistic growth (with carrying capacity).