Assistant Professor - Department of Biology, University of Southwestern Louisiana. January 1986 to August 1988.

Research Associate - Horn Point Environmental Laboratories, University of Maryland. July 1983 to December 1985.

Professional Activities: Editorial Board, Mangroves and Salt Marshes ‘97- ; Editorial Board, Environmental Science and Policy, ‘97- ; Guest Editor, Ecology, ‘99; Associate Editor of Estuaries, ‘93-95; Conference Co-Chair, Estuarine Research Federation 99 Biennual Meeting; Chair, International Chapter, Society of Wetland Scientists, ‘93-97; Board of Directors, Society of Wetland Scientists, ‘93-97

Twilley, R.R, Rivera-Monroy, V.H., Chen, R., Botero, L. 1999. Adapting an ecological mangrove model to simulate trajectories in restoration ecology. Marine Pollution Bulletin 37:404-419.

Twilley, R.R., R. Chen, and V. Rivera-Monroy. 1999. Formulating a succession model of mangrove wetlands in the Caribbean and Gulf of Mexico with emphasis on factors associated with global climate change. Current Topics in Wetland Biogeochemistry 3:118-141.

Chen, R. And R.R. Twilley. 1999. Patterns of mangrove forest structure associated with soil nutrient dynamics along the Shark River estuary. Estuaries 22:1027-1042.

Chen, R. and R. R. Twilley. 1999. A simulation model of organic matter and nutrient accumulation in mangrove wetland soils. Biogeochemistry 44:93-118.

Downing, J.A., M. McClain, R. Twilley, J.M. Melack, J. Elser, N.N. Rabalais, W.M. Lewis, Jr., G. Turner, J. Corredor, D. Soto, A. Yanez-Arancibia, J.A. Kopaska and R.W. Howarth. 1999. The impact of accelerating land-use change on the N-cycle of tropical aquatic ecosystems: Current conditions and projected changes. Biogeochemistry 46:109-148.

Corredor, J.E., Howarth, R.W., Twilley, R.R. And Morel, J. 1999. Nitrogen cycling and anthropogenic impact in the tropical interamerican seas. Biogeochemistry 46:163-178.

Rivera-Monroy, V.H., L.A. Torres, N. Bahamon, F. Newmark, R.R. Twilley. 1999. The potential use of mangrove forests as nitrogen sinks of shrimp aquaculture pond effluents: the role of denitrification. Journal of the World Aquaculture Society 30:12-25.

Rivera-Monroy, V.H., C.J. Madden, J.W. Day, Jr., R.R. Twilley, R.Vera-Herrera, H. Alvarez-Guillen. 1998. Seasonal coupling of a tropical mangrove forest and an estuarine water column: enhancement of aquatic primary productivity. Hydrobiologia 379:41-53.

Twilley, R. R., J. Cowan, T. Miller-Way, and P. Montagna, and B. Mortazavi. 1999. Benthic fluxes of selected estuaries in the Gulf of Mexico, pp. 163-209. IN, T. Bianchi, J. Pennock and R. Twilley (eds). Biogeochemistry of Gulf of Mexico Estuaries. John Wiley and Sons.

Childers, D.L., S.E. Davis, R.R. Twilley, and V. Rivera-Monroy. 1999. Wetland-water column interactions and the biogeochemistry of estuary-watershed coupling around the Gulf of Mexico, pp. 211-235. IN, T. Bianchi, J. Pennock and R. Twilley (eds). Biogeochemistry of Gulf of Mexico Estuaries. John Wiley and Sons.

Bianchi, T., J. Pennock and R. Twilley. 1999. Biogeochemistry of Gulf of Mexico estuaries: implications to management, pp. 407-421. IN, T. Bianchi, J. Pennock and R. Twilley (eds). Biogeochemistry of Gulf of Mexico Estuaries. John Wiley and Sons.

Twilley, R.R. and R. Chen. A water budget and hydrology model of a basin mangrove forest in Rookery Bay, Florida. 1998. Australian Journal of Freshwater and Marine Research. 49:309-323.

Twilley, R.R., R, R. Gottfried, V.H. Rivera-Monroy, M. M. Armijos, A. Bodero. 1998. An approach and preliminary model of integrating ecological and economic constraints of environmental quality in the Guayas River estuary, Ecuador. Environmental Science and Policy 1:271-288.

Chen, R. And R. R. Twilley. 1998. A gap dynamic model of mangrove forest development along gradients of soil salinity and nutrient resources. Journal of Ecology 86:37-52.

Ewel, K., R.R. Twilley , and J.E. Ong. 1998. Different kinds of mangrove forests provide different goods and services. Global Ecology and Biogeography Letters 7:83-94.

Pelegri, S.P. And R.R. Twilley. 1998. Heterotrophic nitrogen fixation (acetylene reduction) during leaf-litter decomposition of two mangrove species from south Florida, USA. Marine Biology 131:53-61.

Twilley, R.R., M. Pozo, V.H. Garcia, V.H. Rivera-Monroy, R. Zambrano, and A. Bodero. 1997. Litter dynamics in riverine mangrove forests in the Guayas River estuary, Ecuador. Oecologia 111:109-122.

Twilley, R.R. 1997. Mangrove wetlands, pp. 445-473. In, M.Messina and W. Connor (eds.), Southern Forested Wetlands: Ecology and Management, CRC Press, Boca Raton, Florida.

Boustany, R.G., C.R. Crozier, J.M. Rybczyk, and R.R. Twilley. 1997. Denitrification in a South Louisiana wetland forest receiving treated sewage effluent. Wetlands Ecology and Management 4:273-283.

Pelegri, S.P., V.H.Rivera-Monroy, R.R. Twilley. 1997. A comparison of nitrogen fixation (acetylene reduction) among three species of mangrove litter, sediments, and pneumatophores in south Florida, USA. Hydrobiologia 356:73-79.

Twilley, R. R., Snedaker, S. C., Yañez-Arancibia, A., Medina, E. 1996. Biodiversity and ecosystem processes in tropical estuaries: perspectives from mangrove ecosystems, pp. 327-370. In: Mooney, H., Cushman, H., Medina, E. Biodiversity and ecosystem functions: a global perspective. John Wiley and Sons, New York.

Caffrey, J.M., D.E. Hammond, J.S. Kuwabara, L.G. Miller, and R.R. Twilley. 1996. Benthic processes in south San Francisco Bay: the role of organic inputs and bioturbation, pp. 425-442. In: J.T. Hollibaugh (ed.), San Francisco Bay: The Ecosystem. AAAS Press, San Francisco, CA.

Miller-Way, T. and R. R. Twilley. 1996. A comparison of batch and continuous flow methodologies for determining benthic fluxes. Marine Ecology Progress Series 142:257-269.

Rivera-Monroy, V.H., and R.R. Twilley. 1996. The relative role of denitrification and immobilization on the fate of inorganic nitrogen in mangrove sediments of Terminos Lagoon, Mexico. Limnology and Oceanography 41:284-296.

Ellison, A.M., E.J. Farnesworth, and R.R. Twilley. 1996. Facultative mutualism between red mangroves and root-fouling sponges in Belizean mangal. Ecology 77: 2431-2444.

Cifuentes, L.A., R.B. Coffin, L. Solarzano, W. Cardenas, J. Espinosa and R.R. Twilley. 1996. Isotopic and elemental variations of carbon and nitrogen in a mangrove estuary. Estuarine, Coastal and Shelf Science 43:781-800.

Day, J.W., C. Coronado-Molina, F. R. Vera-Herrera, R. R. Twilley, V. H. Rivera-Monroy, H. Alvarez-Guillen, R. Day, and W. Conner. 1996. A seven-year record of aboveground net primary production in a mangrove forest bordering Terminos Lagoon. Aquatic Botany 55:39-60.

Twilley, R.R. 1995. Properties of mangrove ecosystems in relation to the energy signature of coastal environments, pp. 43-62. IN: C.A.S. Hall, (ed.), Maximum Power. University Press of Colorado, Niwot.

Twilley, R.R., Snedaker, S. C., Yañez-Arancibia, A., Medina, E. 1995. Mangrove systems, pp. 387-393. In: V.H. Heywood and R.T. Watson (eds.), Global Biodiversity Assessment. United Nations Environment Programme, Cambridge University Press, Great Britian.

Rivera-Monroy, V.H., R.R. Twilley, R. Boustany, J.W. Day, Jr., F.Vera-Herrera, M. Ramirez. 1995. Direct denitrification in mangrove sediments in Terminos Lagoon, Mexico. Marine Ecology Progress Series 126:97-109

National Science Foundation/LTER Program. COERCE LTER - Coastal Oligotrophic Ecosystems Research, the Coastal Everglades. Subcontract with FIU. March 2000 to February 2006. $299,366

USGS/NWRC, "Integrative Management and Rehabilitation of Mangrove Resources to Develop Sustainable Shrimp Mariculture in the Gulf of Fonseca, Honduras", January 2000 to December 2001, PI/PD: Robert Twilley; Co-PI's: Victor Rivera-Monroy. $72,406.

National Science Foundation/Environmental Protection Agency, "Pulses - The Importance of Pulsed Physical Events for Watershed Sustainability in coastal Louisiana", Subcontract with LSU. February 2000 to January 2003, $124,486

US Department of Energy, " Restoration and rehabilitation of wetland ecosystems to sustain energy technologies in coastal environments" June 1999 to June 2002. Funded. $999,815.

USDA Forest Service, Pacific Southwest Research Station, "Predicting the impacts of sea level rise on Micronesian mangrove forests", June 1997 to June 2001. Funded $42,500.

COLCIENCIAS, Colombia, "Structure and Function of a Mangrove Ecosystem Along a Trajectory following landscape-Level Disturbance. March 1998 to April 2001. Funded. $135,000.

NBS/USGS, Everglades Restoration Program, "Interfacing the MANGAL Model with the Mangrove Research and Landscape Modelling Efforts of the Everglades Watershed". Funded Jan 2001 to Sept 2002. $175,000.