delineating fundamental ecological principles on 

 ecosystem structure and function. 



1971 1972 1973 



$0.80 $0.80 $1.00 



National Science Foundation. — The principal 

 objective of the Foundation's support for ecological 

 research is the development of ecological principles. 

 Problems of ecological regulation within communities 

 and ecosystems of oceans, freshwaters, and on land 

 receive major attention. Ecophysiology, bio- 

 geochemistry, micrometeorology, soil ecology, and 

 paleoecology are also supported. A significant fraction 

 of the support listed is provided in the integrated 

 studies of oceanographic, terrestrial (biomes), and crop- 

 pest ecosystems. 



1971 1972 1973 



$7.14 $7.19 $8.71 



National Aeronautics and Space Admin- 

 istration. — Remotely sensed data on atmospheric 

 surface characteristics are employed in the 

 development of ecological models. The models and the 

 remotely sensed data are being investigated to 

 determine their ability to contribute to environmental 

 and resource management. 



1971 1972 1973 



$0.04 $0.04 $0.39 



Department of Agriculture.— Current research 

 emphasizes the relationships between population 

 dynamics of plants and animals in natural and 

 managed ecosystems and their yields and quality. The 

 efficiencies of photosynthesis and soil and water 

 utilization as affected by plant spacing are being 

 investigated. The ultimate objective is to maximize the 

 productivity and quality of animals, crops, and 

 agroecosystems per unit area while still maintaining 

 environmental quality. 



1971 1972 1973 



$3.44 $3.49 $3.32 



b. Relation to Other Sciences 



National Science Foundation. — Research em- 

 phasizes environmental sciences by relating ecological 



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