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Using Esteem-style models to study two-species and three-species interactions in comparison with an in vitro situation
 
 
Authors          Audiences          Overview           Materials          Resources           Future Directions
 

 


Authors


Justine Bell
Champlain - St. Lambert College

 
   
 


Possible Audiences:

FACULTY - introductory general biology, ecology  

 
 


Brief Overview:

TWO ESTEEM-STYLE MODELS. ONE LOOKS AT TWO SPECIES THAT CAN BE MUTUALISTS, COMPETITORS, OR PREDATOR AND PREY. THE OTHER LOOKS AT THREE SPECIES THAT CAN INTERACT IN VARIOUS WAYS:CURRENTLY THERE ARE TWO CHOICES: A MODEL OF THREE COMPETITORS, OR A MODEL OF ONE PREDATOR CHOOSING BETWEEN TWO PREY. TO INCORPORATE THE COMPUTER MODELS INTO A WET-LAB, STUDENTS ARE DIVIDED INTO SIX GROUPS, EACH GROUP SETS UP SIX VIALS CONTAINING DIFFERENT COMBINATIONS OF CHLORELLA, OSCILLATORIUM AND DAPHNIA, THREE GROUPS ADD NITROGEN TO CULTURES. PREDICT WHICH VIAL WILL HAVE THE GREATEST POPULATION GROWTH FOR EACH SPECIES. OBSERVE POPULATIONS AFTER A WEEK. EXAMINE COMPETITION AND PREDATION USING ESTEEM-STYLE MODEL TO SEE IF DAPHNIA ACTS AS A KEYSTONE SPECIES IN THIS SITUATION. THE MODELS CAN BE ADAPTED TO OTHER ECOLOGICAL SITUATIONS AND PROTOCOLS.  

 
   
 


Project Materials:

EXCEL MODELS (TWOSPECIESMODEL AND THREESPECIESMODEL). fOR WET-LAB: VIALS, CHLORELLA, OSCILLATORIUM,DAPHNIA, NITRATES  

 
 


Future Directions:

ADD FURTHER SITUATIONS TO THREE SPECIES MODEL  

 
 


Attachments


- TwoSpeciesModel4.xls
- ThreeSpeciesModel4.xls
- ThreeSpecies3.ppt