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What does the model look like?

Below is a STELLA model of the Southern Pine Beetle infestation in pine forests.  This image map will allow you to click on each icon for a description of that particular part of the model.  After you have investigated the model, you may download the model and run it on your computer.  To do this, click the link to the left, "Run the model."
Stock - Eggs that will develop into adults in 6 weeks Flow - Eggs being laid Flow - Eggs 1 week old moving to next stage Converter - Percent of eggs that develop in 6 weeks Stock - Eggs that will develop into adults in 5 weeks Flow - Eggs being laid Converter - Percent of eggs that develop in 5 weeks Flow - Eggs or larva moving to next weekly stage Stock - Eggs that will develop into adults in 4 weeks Flow - Eggs being laid Converter - Percent of eggs that develop in 4 weeks Flow - Eggs or larva moving to next weekly stage Stock - Eggs that will develop into adults in 3 weeks Flow - Eggs being laid Converter - Percent of eggs that develop in 3 weeks Flow - Eggs or larva moving to next weekly stage Stock - Larva and pupa developing into adults Flow - Beetle move to adult stage and attack Converter - Between tree survival rate Stock - Attacking beetles Flow - Adults reemerging after 1 week to attack again Flow - Adults reemerging after 2 weeks to attack again Flow - Adults staying in tree Stock - Adults not emerging in the first week Flow - Adults no longer attacking Converter - Between tree survival rate Converter - Reproduction rate Converter - Number of eggs

 
Developed by the SC2000 team of teachers
from Wartburg Central High School, Tennessee
Copyright © 2001
NSF logo
This project is supported, in part,
by the

National Science Foundation

Opinions expressed are those of the authors
and not necessarily those of the National Science Foundation.