The food supply of the predator population depends entirely on the size of the prey population. ![]() Suitable for projection or presentation while teaching these activities. The LotkaVolterra predator-prey model makes a number of assumptions about the environment and biology of the predator and prey populations: The prey population finds ample food at all times. Presentation Graphics Used in this ModuleĪll graphics presented in the Teacher Pages/Activity Instructions.The worksheets are made available as printable HTML pages.Īll the Next Generation Science Standards - Disciplinary Core Ideas, Cross Cutting Concepts, and Science & Engineering Principles - aligned to this module’s activities and linked to the NGSS Website. Predators are animals that hunt and kill other animals for food, while the prey is animals that are hunted and killed by predators for food. Worksheets needed by students to carry out the module activities. ![]() (This tutorial is the same as Activity I in each of the three modules.) The worksheets are made available as printable HTML pages. You are going to use a simulator to observe how changes in. When there are many predators, the number of prey declines, causing a decline in the prey population as shown in the graph below. As prey numbers go up, predator numbers also go up. This tutorial introduces students to the capabilities and navigation of the VES-V software through a virtual dive. In a stable ecosystem, the number of predators and the number of prey cycle. All instructions are made available as printable HTML pages. Notice that the predator population stops increasing when the. The following are all the resources for implementing this module:ĭetailed instructions to the eight activities making up this module. If you look at the line graph you will see the oscillations of the prey and predator populations. If the prey is represented by the variable x and the predators by y, the equations are. They will gather biomass data for predators and their prey in complex marine food webs and compare changes over time to the behaviors of the simpler systems with just a single predator and its lone prey. Lotka-Volterra equations, or predator-prey equations, are a pair of first-order nonlinear differential equations describing the interaction between a food source and its consumers. Then, students will collect data on “virtual dives” in simulated marine habitats. Create a graph modeling the predator-prey population cycle. ![]() They will compare the population graphs produced by the model with actual historical data from a similar, simple predator-prey system. The relationship of predator populations and prey populations is very cyclical. Students will analyze a simple predator-prey system, optionally building and “running” a simple, spreadsheet based model. This module introduces students to models used to predict populations of organisms within an ecosystem.
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