b. categorization of these properties and products according to 

 relevance to the needs of various user groups or for their global 

 utility in terms of quality of life. 



c. quantification of these properties and products in terms of 

 environmental quality criteria. 



d. translation of environmental quality criteria into terms of 

 economic value. 



-Lower Priority Projects- 



(information and review paper projects) 



1. Case studies 



Case studies of ecosystem models which have been utilized for resource 

 management. These should, at a minimum, consist of a collection of examples, 

 an annotated bibliography, a critical analysis of how the model was formulated, 

 and what the results were. 



2. Data sources 



An annotated list of data sources of possible use to ecosystem modelers 

 including useful information about type of data, form of data, quality of data, 

 etc. 



3. Model examination 



Theoretical investigation of the properties of ecosystem models and 

 how they are affected by their structure (e.g., linear vs. nonlinear equations). 

 Examination of the program language used and the structure and documentation of 

 the code. Examine how and to what extent model behavior is influenced by 

 structure and language. 



REFERENCES 



Gosselink, J.G. , E.P. Odum, and R.M. Pope, 1973. The value of the tidal 



marsh. Publ. LSU-SG-74-03, Center for Wetland Resources, Louisiana State 

 University, Baton Rough, LA. 



Odum, E.P., and H.T. Odum, 1973. Natural areas as necessary components of 

 man's total environment. North American Wildlife Conference. 



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