ABSTRACT
This chapter serves as vehicle for individual commentary by the author, from his own experiences in the field of resource management, and specifically with regard to mathematical models of the aquatic environment. The circulation of water in the aquatic environment, governed by the forces of nature and sometimes by man, is an important determinant in the response of the ecosystem. In fact, evaluation of the ecologic consequences of changes in circulation is often the central issue in resource management. One of the attractive potentials for the ecologic model in the management context is the broadening field of aquaculture. Today, it seems, the stage is set for a broader view of aquaculture, both as regards the nature of the aquatic ecosystem itself and as regards the benefits derived from management of the whole resource. Finally, the author returns to the question of collapse of the ecosystem under the combined stress of multiple environmental factors, with attendant alteration of the system itself.
