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2008

ZEPP, R. G. Interactions of Changing Solar Ultraviolet Radiation and Climate with Light Induced Chemical Reactions in Aquatic Environments. Presented at Michigan State University, Department of Chemistry, East Lansing, MI, October 10, 2008.

JONES, R., R. G. ZEPP, M. J. CYTERSKI, M. MOLINA, AND E. M. WHITE. LIGHT-INDUCED PROCESSES AFFECTING ENTEROCOCCI IN AQUATIC ENVIRONMENTS. Presented at 2008 Ocean Sciences Meeting, Orlando, FL, March 02 - 07, 2008.

FRICK, W. E., Z. GE, AND R. G. ZEPP. Nowcasting and Forecasting Concentrations of Biological Contaminants at Beaches: A Feasibility and Case Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 42(13):4818-4824, (2008).

ZEPP, R. G., G. C. SHANK, A. VAHATALO, E. BARTELS, AND R. JONES. PHOTOBIOGEOCHEMISTRY OF SARGASSUM: A POTENTIALLY IMPORTANT SOURCE OF CHROMOPHORIC DISSOLVED ORGANIC MATTER IN THE UPPER OCEAN. Presented at 2008 Ocean Sciences Meeting, Orlando, FL, March 02 - 07, 2008.

ZEPP, R. G., G. C. SHANK, E. STABENAU, K. W. PATTERSON, M. J. CYTERSKI, W. S. FISHER, E. BARTELS, AND S. L. ANDERSON. Spatial and Temporal Variability of Solar Ultraviolet Exposure of Coral Assemblages in the Florida Keys: Importance of Colored Dissolved Organic Matter. LIMNOLOGY AND OCEANOGRAPHY. American Society of Limnology and Oceanography, Lawrence, KS, 53(5):1909-1922, (2008).

ZEPP, R. G., C. SHANK, E. STABENAU, K. W. PATTERSON, M. J. CYTERSKI, W. S. FISHER, E. BARTELS, AND S. L. ANDERSON. Spatial and Temporal Variability of Solar Ultraviolet Exposure of Coral Assemblages in the Florida Keys: Importance of Colored Dissolved Organic Matter x. LIMNOLOGY AND OCEANOGRAPHY. American Society of Limnology and Oceanography, Lawrence, KS, 53(5):1909-1922, (2008).

Kong, L., O. Tedrow, AND R. G. ZEPP. Spectroscopic and Photochemical Properties of Water-Soluble Fullerenol. Presented at 236th ACS National Meeting & Exposition, Philadelphia, PA, August 17 - 21, 2008.

Potter, C., S. Klooster, A. Huete, V. Genovese, M. Bustamante, L. G. Ferreira, R. Cosme de Oliveira, AND R. G. ZEPP. Terrestrial Carbon Sinks in the Brazilian Amazon and Cerrado Region Predicted from MODIS Satellite Data and Ecosystem Modeling. Presented at Amazon in Perspective: International Science Conference, Manaus, BRAZIL, November 17 - 20, 2008.

ZEPP, R. G., L. Kong, O. Tedrow, AND K. Chan. Transformations of Fullerenes: Fullerenol and Buckminsterfullerene. Presented at NERL Nano Club Teleconference on Nanomaterials Research, Athens, GA, November 13, 2008.

WOLFE, K. L., W. E. FRICK, R. G. ZEPP, M. MOLINA, M. J. CYTERSKI, AND R. S. PARMAR. Virtual Beach Manager Toolset. Presented at 7th Annual Surface Water Monitoring and Standards Meeting (SWiMS), Chicago, IL, March 18 - 20, 2008.

WOLFE, K. L., W. E. FRICK, R. G. ZEPP, M. MOLINA, AND M. J. CYTERSKI. Virtual Beach: Decision Support Tools for Beach Pathogen Prediction. Presented at EPA Science Forum, Washington, DC, May 20 - 22, 2008.

2007

ZEPP, R. G. COLOR COUNTS! INTERACTIONS OF COLORED ORGANIC MATTER WITH LIGHT AND CONTAMINANTS IN AQUATIC ENVIRONMENTS. Presented at Clemson Institute of Environmental Toxicology, Clemson University, Clemson, SC, March 13, 2007.

ZEPP, R. G., M. A. MORAN, W. SHELDON, E. BIERS, AND G. C. SHANK. EFFECTS OF PHOTOCHEMICAL, MICROBIAL AND SORPTION PROCESSES ON THE OPTICAL PROPERTIES AND DEGRADATION OF DISSOLVED ORGANIC MATTER FROM COASTAL WETLANDS. Presented at 10th International Symposium on Wetland Biogeochemistry, Annapolis, MD, April 01 - 04, 2007.

ZEPP, R. G. AND R. JONES. FACTORS INFLUENCING LIGHT-INDUCED MORTALITY OF ENTEROCOCCI IN SEDIMENT SUSPENSIONS. Presented at ASLO 2007 Aquatic Sciences Meeting, Santa Fe, NM, February 04 - 09, 2007.

ZEPP, R. G., D. J. ERICKSON III, N. D. PAUL, AND B. SULZBERGER. INTERACTIVE EFFECTS OF SOLAR UV RADIATION AND CLIMATE CHANGE ON BIOGEOCHEMICAL CYCLING. PHOTOCHEMICAL AND PHOTOBIOLOGICAL SCIENCES. Royal Society of Chemistry, Cambridge, Uk, 6(3):286-300, (2007).

POTTER, C., M. BUSTAMANTE, S. KLOSTER, V. GENOVESE, L. FERREIRA, A. HUERTE, R. COSME, R. NEMANI, AND R. G. ZEPP. MODELING THE EFFECTS OF CLIMATE AND LAND USE CHANGE ON CARBON AND TRACE GAS BUDGETS OVER THE AMAZON REGION USING NASA SATELLITE PRODUCTS. Presented at Large-Scale Biosphere-Atmosphere Eco Science Team Meeting and Synthesis Workshop, Salvador, BRAZIL, September 26 - 30, 2007.

ZEPP, R. G., R. JONES, J. WILLIS, M. J. CYTERSKI, AND M. MOLINA. PREDICTIVE MODELING OF LIGHT-INDUCED MORTALITY OF ENTEROCOCCI FAECALIS IN RECREATIONAL WATERS. Presented at Society of Environmental Toxicology and Chemistry Annual Meeting, Milwaukee, WI, November 11 - 15, 2007.

WANG, W., O. C. ZAFIRIOU, I. Y. CHAN, R. G. ZEPP, AND N. V. BLOUGH. PRODUCTION OF HYDRATED ELECTRONS FROM PHOTOIONIZATION OF DISSOLVED ORGANIC MATTER IN NATURAL WATERS. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 41(5):1601-1607, (2007).

FERNANDES, E., M. BUSTAMANTE, A. KOZOVITS, AND R. G. ZEPP. REGIONAL EMISSIONS OF NITRIC OXIDE (NO) AND CARBON DIOXIDE (CO2) IN AGROECOSYSTEMS IN CENTRAL WEST REGION, BRAZIL. Presented at Large-Scale Biosphere-Atmosphere Eco Science Team Meeting and Synthesis Workshop, Salvador, BRAZIL, September 28 - 30, 2007.

ZEPP, R. G., G. SHANK, AND C. ROSENFELD. THE IMPACT OF CDOM PHOTOBLEACHING ON UV ATTENUATION NEAR CORAL REEFS IN THE FLORIDA KEYS. Presented at ASLO 2007 Aquatic Sciences Meeting, Santa Fe, NM, February 04 - 09, 2007.

BIERS, E. J., R. G. ZEPP, AND M. A. MORAN. THE ROLE OF NITROGEN IN CHROMOPHORIC AND FLUORESCENT DISSOLVED ORGANIC MATTER FORMATION. MARINE CHEMISTRY. Elsevier Science Ltd, New York, NY, 103(1-2):46-60, (2007).

2006

ZEPP, R. G., D. J. ERICKSON III, N. D. PAUL, AND B. A. SULZBERGER. CHANGING CLIMATE AND PHOTOBIOGEOCHEMICAL CYCLES IN AQUATIC ENVIRONMENTS. Presented at 33rd American Society for Photobiology Meeting, Rio Grande, PUERTO RICO, July 08 - 12, 2006.

ZEPP, R. G., G. C. SHANK, E. BARTELS, E. STABENAU, W. S. FISHER, AND C. FICHOT. DYNAMIC CHANGES IN COLORED DISSOLVED ORGANIC MATTER AND TOTAL SUSPENDED MATTER CONTROL UV EXPOSURE OF CORAL REEFS IN THE FLORIDA KEYS. Presented at 2006 Ocean Sciences Meeting, Honolulu, HI, February 20 - 24, 2006.

Pinto, A. S., M. M. Bustamante, R. S. Silva, K. W. Kisselle, M. Brossard, R. Kruger, R. G. ZEPP, AND R. A. BURKE. Effects of Different Treatments of Pasture Restoration on Soil Trace Gas Emissions in the Cerrados of Central Brazil. Earth Interactions. American Meteorological Society, Boston, MA, 10(1):1-26, (2006).

ZEPP, R. G. NANOSCALE BIOSENSORS IN ECOSYSTEM EXPOSURE RESEARCH. Presented at Workshop on Nanosensors and Nanomaterials for Sensors in Ecosystems Research, Research Triangle Park, NC, March 20, 2006.

MOLINA, M., R. G. ZEPP, A. KOZOVITS, J. BRESOLIN, AND M. BUSTAMANTE. RELATIONSHIP OF MICROBIAL COMMUNITY STRUCTURE AND CARBON DYNAMICS IN SOILS FROM BRAZILIAN SAVANNAS . Presented at 11th International Symposium on Microbial Ecology, Vienna, AUSTRIA, August 20 - 25, 2006.

2005

ZEPP, R. G. APPROACHES TO ESTIMATING LIGHT EXPOSURE OF CORAL REEFS. Presented at Symbiofest, University of Georgia, Department of Ecology, Athens, GA, April 29, 2005.

SHANK, G. C., R. LEE, R. G. ZEPP, AND E. BARTELS. CDOM PRODUCTION BY MANGROVE LEAF LITTER AND SARGASSUM COLONIES IN FLORIDA KEYS COASTAL WATERS. Presented at 2006 Ocean Sciences Meeting, Honolulu, HI, February 20 - 24, 2006.

MOLINA, M., R. G. ZEPP, A. KOZOVITS, J. BRESOLIN, AND M. BUSTAMANTE. EFFECTS OF FERTILIZER ADDITION ON MICROBIAL RESPIRATION AND UPTAKE OF CARBON MONOXIDE IN A CERRADO SOIL. Presented at LBA Science Meeting, Sao Paulo, BRAZIL, November 10 - 12, 2005.

ZEPP, R. G., T. V. CALLAGHAN, AND D. J. ERICKSON. ENVIRONMENTAL EFFECTS OF OZONE DEPLETION AND ITS INTERACTIONS WITH CLIMATE CHANGE: PROGRESS REPORT 2004. PHOTOCHEMICAL AND PHOTOBIOLOGICAL SCIENCES. Royal Society of Chemistry, Cambridge, Uk, 4(2):177-184, (2005).

ZEPP, R. G., G. C. SHANK, M. A. MORAN, W. SHELDON, AND W. MILLER. FACTORS AFFECTING COLORED DISSOLVED ORGANIC MATTER IN AQUATIC ENVIRONMENTS OF THE SOUTHEASTERN UNITED STATES. Presented at EPA Science Forum 2005, Washington, DC, May 16 - 18, 2005.

ZEPP, R. G. FACTORS INFLUENCING EXPOSURE TO INORGANIC AND ORGANIC NANOMATERIALS IN AQUATIC ENVIRONMENTS. Presented at NHEERL Meeting, RTP, NC, July 28, 2005.

MORAN, M. A., E. BIERS, R. G. ZEPP, AND G. C. SHANK. INTERACTIONS OF NITROGEN AND NONLIVING ORGANIC MATTER IN THE FORMATION AND DECOMPOSITION OF CDOM IN COASTAL MARINE ENVIRONMENTS. Presented at Biomaterials & Environmental Marine Biotech Program Review, Arlington, VA, July 19 - 20, 2005.

VAHATALO, A. V. AND R. G. ZEPP. PHOTOCHEMICAL MINERALIZATION OF DISSOLVED ORGANIC NITROGEN TO AMMONIUM IN THE BALTIC SEA. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 39(18):6985-6992, (2005).

ZEPP, R. G., G. C. SHANK, W. S. FISHER, W. L. MILLER, C. FICHOT, E. BARTELS, E. STABENAU, M. A. MORAN, AND R. LEE. TECHNIQUES FOR DETERMINING UV EXPOSURE IN COASTAL WATERS: CASE STUDY IN SOUTH FLORIDA. Presented at Society of Environmental Toxicology and Chemistry Annual Meeting, Baltimore, MD, November 13 - 17, 2005.

ZEPP, R. G., R. A. BURKE, M. MOLINA, K. KISSELLE, M. BUSTAMANTE, A. KOZOVITS, AND A. PINTO. THE LBA PROJECT: NUTRIENT CYCLES AND TRACE GAS EXCHANGE IN SAVANNAS OF CENTRAL BRAZIL. Presented at EPA Science Forum 2005, Washington, DC, May 16 - 18, 2005.

SHANK, G. C., R. G. ZEPP, AND E. BARTELS. UV ATTENUATION NEAR CORAL REEFS IN THE FLORIDA KEYS: LIGHT ABSORPTION BY CDOM AND PARTICLES. Presented at American Geophysical Union Fall Meeting, San Francisco, CA, December 05 - 09, 2005.

SHANK, G. C., R. G. ZEPP, R. F. WHITEHEAD, AND M. A. MORAN. VARIATIONS IN THE SPECTRAL PROPERTIES OF FRESHWATER AND ESTUARINE CDOM CAUSED BY PARTITIONING ONTO RIVER AND ESTUARINE SEDIMENTS. ESTUARINE, COASTAL AND SHELF SCIENCE. Elsevier Science Ltd, New York, NY, 65(1/2):289-301, (2005).

2004

MIELBRECHT, E., L. HANSEN, G. DIDONATO, E. DIDONATO, N. ADAMS, AND R. G. ZEPP. ASSESSING THE IMPACTS OF LOCAL AND GLOBAL STRESSORS ON CORAL REEFS IN AMERICAN SAMOA. Presented at Society of Environmental Toxicology and Chemistry National Meeting, Portland, OR, November 14 - 18, 2004.

ZEPP, R. G., C. SHANK, M. A. MORAN, W. SHELDON, D. KOOPMANS, AND E. STABENAU. CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) DERIVED FROM DECOMPOSITION OF VARIOUS VASCULAR PLANT AND ALGAL SOURCES. Presented at Conference on Chromophoric Dissolved Organic Matter as an Indicator of Ballast Water Exchange, Edgewater, MD, May 17, 2004.

Chen, R. F., P. Bissett, P. Coble, R. Conmy, G. B. Gardner, M. A. Moran, X. Wang, M. L. Wells, P. Whelan, AND R G. Zepp. CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) SOURCE CHARACTERIZATION IN THE LOUISIANA BIGHT. MARINE CHEMISTRY 89(1-4):257-272, (2004).

FISHER, W. S., D. L. SANTAVY, J. E. ROGERS, L. M. OLIVER, AND R. G. ZEPP. CORAL CONDITION: HOW TO FATHOM THE DECLINE OF CORAL REEF ECOSYSTEMS. Presented at Special Corals Biocriteria Seminar, EPA Office of Science and Technology, Washington, DC, December 07, 2004.

Zepp, R G., W. Sheldon, AND M. A. Moran. DISSOLVED ORGANIC FLUOROPHORES IN SOUTHEASTERN US COASTAL WATERS: CORRECTION METHOD FOR ELIMINATING RAYLEIGH AND RAMAN SCATTERING PEAKS IN EXCITATION-EMISSION MATRICES. MARINE CHEMISTRY 89(1-4):15-36, (2004).

Molina, M, L. Viana, R A. Burke Jr., M. Bustamante, AND R G. Zepp. EFFECT OF MANAGEMENT PRACTICES ON THE SOIL MICROBIAL COMMUNITY IN AGRICULTURAL AND NATIVE SYSTEMS IN BRAZIL. Presented at American Society for Microbiology Annual Meeting, New Orleans, LA, May 23-27, 2004.

ZEPP, R. G., T. V. CALLAGHAN, AND D. ERICKSON. ENVIRONMENTAL EFFECTS OF OZONE DEPLETION AND ITS INTERACTIONS WITH CLIMATE CHANGE: PROGRESS REPORT 2003. PHOTOCHEMICAL AND PHOTOBIOLOGICAL SCIENCES 3(1):1-5, (2004).

ZEPP, R. G. IMPACTS OF GLOBAL CHANGE ON UV EXPOSURE IN COASTAL SHELF REGIONS OF THE SOUTHEASTERN UNITED STATES. Presented at NHEERL-GED Seminar Series, Gulf Breeze, FL, March 16, 2004.

Shank, G. C., R G. Zepp, R. F. Whitehead, AND M. A. Moran. IMPACTS OF SEDIMENT/WATER PARTITIONING ON SPECTRAL PROPERTIES OF DISSOLVED ORGANIC MATTER. Presented at 50th Anniversary Celebration of the National Research Council Associateship Program, Washington, DC, November 19, 2004.

ZEPP, R. G. INTERACTIONS OF CHANGING CLIMATE AND ULTRAVIOLET RADIATION IN AQUATIC AND TERRESTRIAL BIOGEOCHEMICAL CYCLES. Presented at American Society for Photobiology National Meeting, Seattle, WA, July 11 - 15, 2004.

ZEPP, R. G. INTERACTIONS OF LIGHT AND CHEMICAL REACTIONS IN THE AQUATIC ENVIRONMENT: KINETIC AND MECHANISTIC ASPECTS. Presented at Lecture at the University of Georgia, Department of Chemistry Seminar Series, Athens, GA, February 11, 2004.

ZEPP, R. G. INTERACTIONS OF SOLAR UV RADIATION AND DISSOLVED ORGANIC MATTER IN AQUATIC ENVIRONMENTS. Presented at University of Minnesota, Department of Chemistry Seminar Series, Minneapolis, MN, March 01, 2004.

FISHER, W. S., D. L. SANTAVY, J. E. ROGERS, AND R. G. ZEPP. MEETING AT PORTLAND, OR: CORAL RESPONSES TO CLIMATE AND LAND USE CHANGES. Presented at Society of Toxicology and Chemistry National Meeting, Portland, OR, November 14 - 18, 2004.

KOZOVITS, A. R., L. T. VIANA, D. M. SOUSA, A. S. PINTO, M. M. BUSTAMANTE, AND R. G. ZEPP. NO FLUXES FROM SAVANNAS OF CENTRAL BRAZIL (CERRADO) SUBJECTED TO NITROGEN AND PHOSPHORUS FERTILIZATION. Presented at Third LBA Scientific Conference, Brasilia, BRAZIL, July 27 - 29, 2004.

Kisselle, K. W., R G. Zepp, R A. Burke Jr., M Molina, AND M. Bustamante. NOX AND CO EMISSIONS FROM CERRADO PLANT LITTER. Presented at LBA Science Meeting, Brasilia, Brazil, July 26-28, 2004.

Xie, H., O. C. Zafiriou, W. J. Cai, Y. Wang, AND R G. Zepp. PHOTOOXIDATION AND ITS EFFECTS ON THE CARBOXYL CONTENT OF DISSOLVED ORGANIC MATTER IN TWO COASTAL RIVERS IN THE SOUTHEASTERN UNITED STATES. ENVIRONMENTAL SCIENCE & TECHNOLOGY 38(15):4113-4119, (2004).

Molina, M, L. Viana, M. Bustamante, AND R G. Zepp. RESPONSE OF THE SOIL MICROBIAL COMMUNITY TO FERTILIZATION PRACTICES IN AGRICULTURAL AND NATIVE CERRADO SYSTEMS IN BRAZIL. Presented at LBA Science Meeting, Brasilia, Brazil, July 26-26, 2004.

Stabenau, E., R G. Zepp, E. Bartels, AND R. G. Zika. ROLE OF SEAGRASS (THALASSIA TESTUDINUM) AS A SOURCE OF CHROMOPHORIC DISSOLVED ORGANIC MATTER IN COASTAL SOUTH FLORIDA. MARINE ECOLOGY PROGRESS SERIES. Inter-Research, Luhe, Germany, 282:59-72, (2004).

ZEPP, R. G., E. STABENAU, M. A. MORAN, AND D. KOOPMANS. SEAGRASS AND CDOM IN THE FLORIDA KEYS. Presented at Second Annual Conference on the Effects of Combined Sea Temperature, Light, and Carbon Dioxide on Coral Bleaching, Settlement and Growth, Lee Stocking Island, BAHAMAS, January 26 - 29, 2004.

Varella, R., M. Bustamante, A. Pinto, K. Kisselle, R. Santos, R A. Burke Jr., R G. Zepp, AND L. Viana. SOIL FLUXES OF CO2, CO, NO AND N2O FROM AN OLD-PASTURE AND FROM NATIVE SAVANNA IN BRAZIL. ECOLOGICAL APPLICATIONS 14(4 Supplement):S221-S231, (2004).

KOZOVITS, A. R., L. T. VIANA, D. M. SOUSA, M. M. BUSTAMANTE, AND R. G. ZEPP. TRACE GAS EMISSIONS FROM THE SOIL RELATED TO LAND-USE CHANGES IN THE CERRADO REGION. Presented at Third LBA Scientific Conference, Brasilia, BRAZIL, July 27 - 29, 2004.

SHANK, G. C., R. G. ZEPP, R. F. WHITEHEAD, AND M. L. SMITH. VARIATIONS IN THE SPECTRAL PROPERTIES OF ESTUARINE WATER CAUSED BY CDOM PARTITIONING ONTO RIVER AND ESTUARINE SEDIMENTS. Presented at 2004 Ocean Research Conference, Honolulu, HI, February 15 - 20, 2004.

2003

Kisselle, K., R G. Zepp, M Molina, R A. Burke Jr., AND A. J. Franzluebbers. EFFECTS OF FERTILIZER TYPE (CHICKEN LITTER VS. INORGANIC FERTILIZER) AND CATTLE GRAZING ON THE SOIL MICROBIAL COMMUNITY. Presented at 2003 Annual Symposium: Soil Biodiversity and Function, Lancaster, United Kingdom, March 25-27, 2003.

Xie, H., O. C. Zafiriou, W. J. Cai, AND R G. Zepp. EFFECTS OF SUNLIGHT ON CARBOXYL CONTENT OF DISSOLVED ORGANIC MATTER IN THE SATILLA RIVER OF GEORGIA, UNITED STATES. Presented at 225th American Chemical Society National Meeting, New Orleans, LA, March 23-27, 2003.

Zepp, R G. INTERACTIONS OF CLIMATE CHANGE AND UV RADIATION AS CORALS STRESSORS. Presented at Science Forum 2003, Washington, DC, May 5-7, 2003.

Zepp, R G., T. V. Callaghan, AND D. J. ERICKSON. INTERACTIVE EFFECTS OF OZONE DEPLETION AND CLIMATE CHANGE ON BIOGEOCHEMICAL CYCLES. PHOTOCHEMICAL AND PHOTOBIOLOGICAL SCIENCES 2(1):51-61, (2003).

White, E. M., P. P. Vaughan, AND R G. Zepp. PHOTOCHEICAL PRODUCTION OF HYDROXYL RADICAL IN NATURAL WATER - THE ROLE OF IRON AND DISSOLVED ORGANIC MATTER. Presented at 225th American Chemical Society National Meeting, New Orleans, LA, March 23-27, 2003.

Zepp, R G., M. A. Moran, AND D. Koopmans. PHOTOREACTIVITY OF CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) DERIVED FROM DECOMPOSITION OF VARIOUS VASCULAR PLANT AND ALGAL SOURCES. Presented at 225th American Chemical Society National Meeting, New Orleans, LA, March 23-27, 2003.

White, E. M., P. P. Vaughan, AND R G. Zepp. ROLE OF THE PHOTO-FENTON REACTION IN THE PRODUCTION OF HYDROXYL RADICALS AND PHOTOBLEACHING OF COLORED DISSOLVED ORGANIC MATTER IN A COASTAL RIVER OF THE SOUTHEASTERN UNITED STATES. AQUATIC SCIENCES 65(4):402-414, (2003).

Zepp, R G. SHEDDING LIGHT ON CORALS HEALTH: INTERACTIONS OF CLIMATE CHANGE AND SOLAR RADIATION WITH BLEACHING. Presented at Corals Reefs, Climate, and Coral Bleaching Workshop, Oahu, HI, June 18-20, 2003.

Zepp, R G. SOLAR ULTRAVIOLET RADIATION AND AQUATIC CARBON, NITROGEN, SULFUR AND METALS CYCLES. Chapter 5, E.W. Helbling and H. Zagarese (ed.), UV Effects in Aquatic Organisms and Ecosystems. Royal Society of Chemistry, Cambridge, Uk, , 137-183, (2003).

Zepp, R G. UV EXPOSURE OF CORAL ASSEMBLAGES IN THE FLORIDA KEYS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-03/095 (NTIS PB2005-101445), 2003.

2002

Hu, C., F. E. MullerKarger, AND R G. Zepp. ABSORBANCE, ABSORPTION COEFFICIENT, AND APPARENT QUANTUM YIELD: A COMMENT ON AMBIGUITY IN THE USE OF THESE OPTICAL CONCEPTS. LIMNOLOGY AND OCEANOGRAPHY 47(4):1261-1267, (2002).

Miller, W. L., M. A. Moran, W. Sheldon, R G. Zepp, AND S. P. Opsahl. DETERMINATION OF APPARENT QUANTUM YIELD SPECTRA FOR THE FORMATION OF BIOLOGICALLY LABILE PHOTOPRODUCTS. LIMNOLOGY AND OCEANOGRAPHY 47(2):343-352, (2002).

Kisselle, K., R G. Zepp, R A. Burke Jr., A. Pinto, AND M. Bustamante. NOX AND CO EMISSIONS FROM SOIL AND SURFACE LITTER IN A BRAZILIAN SAVANNA. Presented at 2nd Science Meeting for the Large Atmosphere and Biosphere in Amazonia (LBA), Manaus, Brazil, July 7-10, 2002.

Zepp, R G., M. A. Moran, E. White, AND E. Stabenau. PHOTOCHEMICAL AND BIOLOGICAL DEGRADATION OF CDOM IN WATERS FROM SELECTED COASTAL REGIONS OF THE SOUTHEASTERN UNITED STATES. Presented at 2002 Ocean Sciences Meeting, Honolulu, HI, February 11-15, 2002.

Kisselle, K., R G. Zepp, R A. Burke Jr., S. P. Opsahl, A. Pinto, M. Bustamante, L. Viana, AND R. Varella. SEASONAL SOIL FLUXES OF CARBON MONOXIDE IN BURNED AND UNBURNED BRAZILIAN SAVANNAS. JOURNAL OF GEOPHYSICAL RESEARCH 107(D20):8051-8051, (2002).

Pinto, A., M. Bustamante, L. Viana, R. Varella, R G. Zepp, R A. Burke Jr., M Molina, AND K. Kisselle. SOIL EMISSIONS OF N2O, NO AND CO2 IN BRAZILIAN SAVANNAS: EFFECTS OF VEGETATION TYPE, SEASONALITY, AND PRESCRIBED FIRES. JOURNAL OF GEOPHYSICAL RESEARCH 107(D20):8089-8089, (2002).

Zepp, R G. SOLAR UV RADIATION AND AQUATIC BIOGEOCHEMISTRY. Presented at Ozone Depletion over the Southern Ocean Workshop, Dunedin, New Zealand, February 22, 2002.

Viana, L., A. Pinto, M. Bustamante, M Molina, R G. Zepp, AND K. Kisselle. STRUCTURE OF MICROBIAL COMMUNITIES IN NATIVE AND CONVERTED SAVANNA AREAS OF CENTRAL BRAZIL. Presented at American Society for Microbiology Annual Meeting, Salt Lake City, UT, May 19-23, 2002.

2001

Anderson, S. L., R G. Zepp, J. Machula, L J. Hansen, G. Cherr, AND E. Mueller. ASSESSING UV IRRADIANCE IN CARIBBEAN REEF CORAL AND DNA DAMAGE IN THEIR CORAL AND ZOOXANTHELLAE. Presented at American Society of Limnology and Oceanography Aquatic Sciences Meeting, Albuquerque, NM, February 12-16, 2001.

Bustamante, M., A. Pinto, L. Viana, G. Nardoto, R G. Zepp, R A. Burke Jr., M Molina, AND K. Kisselle. EFFECTS OF PRESCRIBED FIRES ON NITROGEN FLUXES IN SAVANNA FORMATIONS OF CENTRAL BRAZIL. Presented at Large Scale Biosphere-Atmosphere Experiment in Amazonia Open Meeting, Atlanta, GA, February 12-14, 2001.

Anderson, S. L., J. Machula, G. Cherr, R G. Zepp, D L. Santavy, L J. Hansen, AND E. Mueller. INDICATORS OF UV EXPOSURE IN CORALS AND THEIR RELEVANCE TO GLOBAL CLIMATE CHANGE AND CORAL BLEACHING. HUMAN AND ECOLOGICAL RISK ASSESSMENT 7(5):1271-1282, (2001).

Zepp, R G., E. White, AND P. P. Vaughan. INFLUENCE OF DISSOLVED ORGANIC MATTER ON AGROCHEMICAL PHOTOREACTIONS IN AQUATIC ENVIRONMENTS. Presented at 221st American Chemical Society National Meeting, San Diego, CA, April 1-5, 2001.

Zepp, R G. INTERACTIONS OF SOLAR ULTRAVIOLET RADIATION AND DISSOLVED ORGANIC MATTER IN FRESHWATER AND MARINE ENVIRONMENTS. Presented at Lehigh University - Invited Speaker, Bethlehem, PA, March 8, 2001.

Kisselle, K., R G. Zepp, R A. Burke Jr., A. Pinto, AND M. Bustamante. PHOTOCHEMICAL EFFECTS ON NOX AND CO EMISSIONS IN A BRAZILIAN SAVANNA. Presented at Ecological Society of America Meeting, Madison, WI, August 5-10, 2001.

Opsahl, S. P., J W. Jones*, AND R G. Zepp. PHOTOCHEMICALLY-INDUCED ALTERATION OF STABLE CARBON ISOTOPE RATIOS (DELTA C-13) IN TERRIGENOUS DISSOLVED ORGANIC CARBON. GEOPHYSICAL RESEARCH LETTERS 28(12):2417-2420, (2001).

Opsahl, S. P. AND R G. Zepp. PHOTOCHEMICALLY-INDUCED TRANSFORMATIONS OF DISSOLVED ORGANIC MATTER IN RIVERINE WATERS. Presented at American Society of Limnology and Oceanography Aquatic Sciences Meeting, Albuquerque, NM, February 12-16, 2001.

Zepp, R G. PHOTOREACTIONS IN SURFACE WATERS AND THEIR ROLE IN BIOGEOCHEMICAL CYCLES. Presented at American Society of Limnology and Oceanography Aquatic Sciences Meeting, Albuquerque, NM, February 12-16, 2001.

Pinto, A., M. Bustamante, L. Viana, R G. Zepp, R A. Burke Jr., M Molina, AND K. Kisselle. SOIL EMISSIONS OF CO2 AND CO IN TROPICAL SAVANNAS OF CENTRAL BRAZIL UNDER DIFFERENT FIRE REGIMES. Presented at Large Scale Biosphere-Atmosphere Experiment in Amazonia Open Meeting, Atlanta, GA, February 12-14, 2001.

2000

Moran, M. A., W. Sheldon, AND R G. Zepp. CARBON LOSS AND OPTICAL PROPERTY CHANGES DURING LONG-TERM PHOTOCHEMICAL AND BIOLOGICAL DEGRADATION OF ESTUARINE DISSOLVED ORGANIC MATTER. LIMNOLOGY AND OCEANOGRAPHY 45(6):1254-1264, (2000).

Pinto, A., R. Varella, G. Nardoto, L. Viana, L. Andrade, R. Chiba, R. Santos, M. Bustamante, R A. Burke Jr., M Molina, R G. Zepp, K. Kisselle, AND S. P. Opsahl. IMPACTS OF LAND USE CHANGE AND FIRE ON NUTRIENT AND CARBON CYCLES AND TRACE GAS EXCHANGE IN SOILS OF THE CERRADO IN CENTRAL BRAZIL. Presented at First Large Scale Biosphere-Atmospheric Experiment in Amazonia (LBA) Scientific Conference, Belem, Brazil, June 26-30, 2000.

Anderson, S. L., J. Machula, G. Cherr, R G. Zepp, D L. Santavy, L J. Hansen, AND E. Mueller. INDICATORS OF UV EXPOSURE IN CORAL AND THEIR RELEVANCE TO GLOBAL CLIMATE CHANGE AND CORAL BLEACHING. Presented at US Environmental Protection Agency Symposium on Indicators in Health and Environmental Risk Assessment, Research Triangle Park, NC, June 5-6, 2000.

Anderson, S. L., J. Machula, G. Cherr, R G. Zepp, D L. Santavy, L J. Hansen, AND E. Mueller. INDICATORS OF UV EXPOSURE IN CORALS: RELEVANCE TO GLOBAL CLIMATE CHANGE AND CORAL BLEACHING. Presented at Ninth International Coral Reef Symposium, Bali, Indonesia, October 23-27, 2000.

Zepp, R G., M. A. Moran, AND W. Sheldon. INTERACTIONS BETWEEN PHOTOCHEMICAL AND MICROBIAL DECOMPOSITION IN MODIFYING THE BIOLOGICAL AVAILABILITY AND OPTICAL PROPERTIES OF ESTUARINE DISSOLVED ORGANIC MATTER. Presented at American Geophysical Union Ocean Sciences Meeting, San Antonio, TX, January 24-28, 2000.

Pinto, A., R. Varella, G. Nardoto, L. Viana, L. Andrade, R. Chiba, R. Santos, M. Bustamante, R A. Burke Jr., K. Kisselle, M Molina, AND R G. Zepp. INTERACTIONS OF NUTRIENT AND CARBON CYCLES AND TRACE GAS EXCHANGE WITH LAND USE CHANGE AND FIRE IN THE CERRADO OF CENTRAL BRAZIL. Presented at American Geophysical Union Meeting, San Francisco, CA, December 15-20, 2000.

Erickson, D. J., R G. Zepp, AND E. Atlas. OZONE DEPLETION AND THE AIR-SEA EXCHANGE OF GREENHOUSE AND CHEMICALLY REACTIVE TRACE GASES. CHEMOSPHERE - GLOBAL CHANGE SCIENCE 2(2):137-149, (2000).

Xie, H., Y. Wang, W. J. Cai, O. C. Zafiriou, AND R G. Zepp. PHOTOCHEMICAL ALTERATION OF DISSOLVED ORGANIC MATTER: EFFECTS ON THE CONCENTRATION AND ACIDITIES OF IONIZABLE SITES IN DISSOLVED ORGANIC MATTER IN THE SATILLA RIVER OF GEORGIA, USA. Presented at 10th International Meeting of the International Humic Substance Society, Toulouse, France, July 24-28, 2000.

Vaughan, P. P., N. V. Blough, AND R G. Zepp. PHOTOCHEMICAL PRODUCTION OF REACTIVE OXYGEN SPECIES BY CONSTITUENTS OF COLORED DISSOLVED ORGANIC MATTER AND COASTAL RIVER WATERS IN THE SOUTHEASTERN UNITED STATES. Presented at American Geophysical Union Ocean Sciences Meeting, San Antonio, TX, January 24-28, 2000.

Zepp, R G., E. Davis, S. L. Anderson, D L. Santavy, L J. Hansen, AND K. Patterson. ROLE OF DOM PHOTOREACTIONS IN CONTROLLING UV EXPOSURE OF CORAL ASSEMBLAGES IN THE FLORIDA KEYS. Presented at The International Chemical Congress of Pacific Basin Societies, Honolulu, HI, December 14-19, 2000.

Ravichandran, M., R Araujo, AND R G. Zepp. ROLE OF HUMIC SUBSTANCES ON THE PHOTOCHEMICAL REDUCTION OF MERCURY. Presented at 220th American Chemical Society National Meeting, Washington, DC, August 20-24, 2000.