VI-134 



are required. Tne actual impact of nutrients on estuarine 

 eutropni cation problems must be understood. We must establish 

 the major nutrient concentrations allowable in various estuaries 

 Dased on watersned characteristics, influent stream concentrations, 

 and the overall watershed management policies. An approach often 

 overlooked on this topic is the complementary use of experimental 

 studies and modeling techniques in which each is employed to direct 

 the development of the other in the same way as computer analyses 

 and test flights have interacted in tne space program. Certainly, 

 more knowledge will have to be developed about the rates and 

 conditions under which organic material is mineralized by Dacteria 

 to the active chemical stage where it can be reincorporated into 

 new plant material . 



lCULOGY AiJD ENVIRONMENTAL REQUIREME.>iTS 

 OF MARINE BACTERIA 



Detailed knowledge of the environmental requirements and ecological 

 relationships of marine uenthic bacteria and of attached algal forms 

 as well as the free-living and more economically important marine 

 species is necessary to insure that environmental changes allowed 

 do not effect water-use at a point many biological steps removed 

 from the initial effect. Studies of factors involved in natural 

 population succession and natural fluctuations in populations of a 

 single species and/or a community of species are required when it 



