Intrinsic growth rate

Definition

Intrinsic growth rate is the maximum rate at which a microbial population increases in size under optimal environmental conditions. It reflects the inherent capacity of the microbe to reproduce.

5 Must Know Facts For Your Next Test

1. Intrinsic growth rate is denoted by the symbol 'r'.
2. It is determined under conditions where nutrients and other environmental factors are not limiting.
3. Temperature, pH, and availability of resources significantly impact the intrinsic growth rate.
4. The intrinsic growth rate can be derived from the exponential phase of a microbial growth curve.
5. Understanding intrinsic growth rate helps in predicting microbial behavior in natural and artificial environments.

Review Questions

• What symbol is commonly used to represent intrinsic growth rate?
• Under what conditions is the intrinsic growth rate measured?
• Why is it important to understand the intrinsic growth rate of microbes?

Related terms

Exponential Growth Phase: A phase in bacterial growth where cells divide at a constant and rapid rate.

Carrying Capacity: The maximum population size that an environment can sustain indefinitely.

Lag Phase: The initial period of adjustment for microbes before they start dividing rapidly.