2 

 With a total gross productioo and respiration exceeding 8 g C/m /day 



or about 16 g organic matter/m^/day, the red mangrove is more fertile 



than most marine and terrestrial communities. (L.H.) 



Keywords: mangrove, primary productivity, metabolism, Puerto Rico 



II-D-2 



Miller, P.C. 1972. Bioclimate, leaf temperature, and primary production 

 in red mangrove canopies in South Florida. Ecology 53:22-45. 



A model of primary production and transpiration of forest canopies 

 was developed from the energy-budget equation of individual leaves to 

 clarify some of the physical processes affecting primary production. 

 The model calculates hourly vertical profiles of temperature, transpi- 

 ration, respiration, and gross and net photosynthesis of both sunlit 

 and shaded leaves and calculates appropriately weighted totals for the 

 hourly water loss and gross and net photosynthesis for each level in 

 the canopy. The model includes variation in leaf resistances caused 

 by changes in absorbed solar radiation and changes in leaf water deficit 

 and also takes into account the interdependence of the infrared profiles 

 and the leaf -temperature profiles within the canopy. The model was 

 tested with data collected on red mangrove ( Rhizophora mangle Roxb.) 

 forests. Canopy structure and the daily courses of solar and infrared 

 radiation, air temperature, humidity, wind, and ground temperatures 

 were measured and used as input data for the model. The model produced 

 realistic leaf temperatures, leaf resistances, transpiration rates, 

 and primary production rates and was used to indicate the relative 

 importance of environmental variables in influencing leaf temperature, 

 transpiration, and primary production. (A. A., excerpt) 



Keywords: mangrove, primary productivity, energy-budget, Florida 



II-D-3 



Conner, W.H. 1975. Productivity and composition of a freshwater swamp 



in Louisiana. M.S. Thesis, Louisiana State University, Baton Rouge. 



85 pp. 



This is a report on an October 1973 to October 1974 study of the 

 productivity and composition of the freshwater swamp in the Lac des 

 Allemands area, which is in the upper drainage basin of the Barataria 

 Bay system. The productivity of Barataria Bay is well documented. 

 The influx of freshwater from the swamp is critical to the estuarine 

 nursery areas, which are dependent upon the balance between fresh and 

 salt waters. Also, nutrient cycles and detrital chains within the 

 estuary are enhanced by the import of nutrients and organic matter 

 from the swamp. 



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