Students will graph the two population curves (one for the predator, one for the prey) over time and observe that both populations rise and fall in a cycle. Students will “run” this model for several simulated years by filling in successive spreadsheet rows with each monthly population value for the predator and its prey, using the model’s equations. Students will enter the simple equations that govern a predator-prey system into the spreadsheet. Students will construct the predator-prey model using a spreadsheet program. Students will then use these equations to build a simple mathematical model of a predator-prey system. Students will learn about a few simple equations that can be used to model these concepts about predator and prey populations. Students will discuss factors that might influence the birth rate, death rate, and population size for each of the two species. That simple system includes a single species of predator, and a single species of prey. Students will first learn about interactions between populations of creatures by studying a simple system with just two organisms. The numbers and types of fish and other aquatic creatures displayed in different locations in the VES-V simulations are based on actual abundances of marine creatures. VES-V displays marine environments as though one was SCUBA diving in those habitats. Students will explore a simulated marine environment using a computer-based virtual reality (VR) data visualization tool called VES-V (Virtual Ecosystem Scenario Viewer). This module introduces students to models used to predict populations of organisms within an ecosystem. Each activity will require 1-2 class periods (assuming 50-minute class periods) to complete. Presentation Graphics Used in this Module (click to download).
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