David Lawlor, Senior Postdoctoral Fellow, University of London. 

 "Effects of Elevated Carbon Dioxide on the Structure, 

 Composition, and Photosynthetic Function of Scirpus in a 

 Salt Marsh Community," with Bert Drake, from April 1 to 

 October 31, 1990. 



Junda Lin, Postdoctoral Fellow, University of North Carolina, 



Chapel Hill. "Effects of Food Supply on Macoma Balthica's 

 Feeding Mode, and Its Subsequent Susceptibility to 

 Predation," with Anson Hines, from August 14, 1989 to 

 August 13, 1990. 



Nancy Staub, Postdoctoral Fellow, University of California, 

 Berkeley. "Patterns of Sexual Dimorphism and their 

 Ecological Consequences in Plethodontid Salamanders," with 

 James Lynch, from April 3, 1989 to April 2, 1990. 



Panchabi Vaithiyanathan, Postdoctoral Fellow, Jawaharlal Nehru 

 University, India. "Factors Controlling the Release of 

 Phosphorus from Sediments to Water in the Estuarine Region: 

 A Case Study of the Rhode River Estuary," with David 

 Correll, from September 1, 1989 to August 31, 1990. 



Joseph T. A. Verhoeven, Senior Postdoctoral Fellow, University of 

 Nijmegen, The Netherlands. "Nitrogen Cycling along an 

 Environmental Gradient: Mineralization in Relation to 

 Litter Quality and Redox Conditions," with Dennis Whigham, 

 from January 15 to December 15, 1989. 



Lisa K. Wagner, Visiting Scientist, University of California, 

 Berkeley. "Regulation of Fruit and Seed Production in 

 Hibiscus moscheutos (Malvaceae): Role of Resources and 

 Predation, " with Dennis Whigham, from June 14 to September 

 12, 1989. 



Zhigang Wang, Postdoctoral Fellow, University of Cambridge. 



"Population Ecology of Epifagus Virginiana , " with Dennis 

 Whigham, from October 1, 1989 to September 30, 1990. 



Jess Zimmerman, Postdoctoral Fellow, University of Utah. "The 

 Function of Storage Organs in the Orchid Tipularia 

 iscolor , " with Dennis Whigham, from August 1, 1989 to July 

 31, 1990. 



SMITHSONIAN TROPICAL RESEARCH INSTITUTE 



Jacqueline Belwood , Postdoctoral Fellow, University of Florida. 

 "The Role of Tremulation in the Mating Behavior of 

 Neotropical Pseudophylline Katydids (Insecta: Orthoptera: 

 Tettigoniidae) , " with Egbert Leigh, from March 1, 1989 to 

 February 28, 1990. 



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