The Price of Predation
The price of predation explains how the size of a consumer population determines its caloric needs, and a larger consumer population must eat more organisms from the resource population, directly increasing deaths among the prey. In Amplify Science (California) Grade 7, Chapter 2: Energy and Changes to Populations, students analyze how predator population size drives changes in prey death rates.
Key Concepts
The size of a consumer population determines its caloric needs. A larger consumer population requires more energy, which means they must eat more organisms from the resource population .
This increased consumption leads to an increase in deaths among the resource population.
Common Questions
How does predator population size affect prey death rates?
A larger predator population needs more energy, so it must eat more prey. This increased consumption directly raises the death rate in the prey (resource) population.
What is the relationship between consumer population size and resource consumption?
Larger consumer populations require more energy storage molecules, meaning they consume more organisms from the resource population. This creates a direct link between consumer size and prey death rates.
Why can a large predator population cause prey decline?
When a predator population grows large, it collectively eats so many prey that the prey death rate exceeds the birth rate, causing the prey population to decline.
Where is the price of predation covered in Amplify Science Grade 7?
The price of predation is covered in Amplify Science (California) Grade 7, Chapter 2: Energy and Changes to Populations.