2019

Impact of ecohydrological fluctuations on iron-redox cycling. Calabrese, Salvatore, and Amilcare Porporato (2019): Soil Biology and Biochemistry 133: 188-195 Cross-CZO

2019

Nutrient export and elemental stoichiometry in an urban tropical river. William H. McDowell, William G. McDowell, Jody D. Potter, Alonso Ramírez (2019): Ecological Applications

2018

Biogeochemical cycling of iron and carbon in humid (sub)tropical forest soils under fluctuating redox conditions. Barcellos, Diego (2018): PhD Dissertation, Department of Crop and Soil Sciences, University of Georgia Cross-CZO

2018

Faster redox fluctuations can lead to higher iron reduction rates in humid forest soils. Barcellos, Diego, K. Taylor Cyle, Aaron Thompson (2018): Biogeochemistry 137 (3): 367-378 Cross-CZO

2018

The effects of lithology on trace element and REE behavior during tropical weathering. Chapela Lara, M., Buss, H.L., Pett-Ridge, J.C. (2018): Chemical Geology. 500: 88-102

2018

Influence of pO2 on iron redox cycling and anaerobic organic carbon mineralization in a humid tropical forest soil. Chen, Chunmei, Christof Meile, Jared Wilmoth, Diego Barcellos, and Aaron Thompson (2018): Environmental Science & Technology 52 (14): 7709-7719 Cross-CZO

2018

Hot Spots and Hot Moments of Soil Moisture Explain Fluctuations in Iron and Carbon Cycling in a Humid Tropical Forest Soil . Diego Barcellos, Christine S. O’Connell, Whendee Silver, Christof Meile, Aaron Thompson (2018): Soil Systems

2018

Contrasting Fe speciation in two humid forest soils: Insight into organomineral associations in redox-active environments. Elizabeth K.Coward, AaronThompson, Alain F.Plante (2018): Geochimica et Cosmochimica Acta

2018

Potential for iron reduction increases with rainfall in montane basaltic soils of Hawaii. Hodges, C., E. King, J. Pett-Ridge, A. Thompson (2018): Soil Science Society of America Journal 82:176-185 Cross-CZO

2018

Transient O2 pulses direct Fe crystallinity and Fe(III)-reducer gene expression within a soil microbiome. Jared Lee Wilmoth, Mary Ann Moran, Aaron Thompson (2018): Microbiome

2018

A net ecosystem carbon budget for snow dominated forested headwater catchments: linking water and carbon fluxes to critical zone carbon storage. Perdrial J., Brooks P.D., Swetnam T., Lohse K.A., Rasmussen C., Litvak M., Harpold A.A., Zapata-Rios X., Broxton P., Mitra B., Meixner M., Condon K., Huckle D., Stielstra C., Vázquez-Ortega A., Lybrand R., Holleran M., Orem C., Pelletier J., Chorover J. (2018): Biogeochemistry 138{3): 225–243 Cross-CZO

2018

Order from disorder: do soil organic matter composition and turnover co-vary with iron phase crystallinity?. Steven, J. Hall, Asmeret A. Berhe, Aaron Thompson. (2018): Biogeochemistry

2018

Short-range-ordered (SRO) iron minerals are dynamic, emergent representations of recent environmental conditions in soils . Thompson, Aaron (2018): American Geophysical Union 2018 Fall Meeting, Washington, DC, 10-14 Dec 2018 Cross-CZO

2017

Hot spots and hot moments for redox, iron and carbon cycling in soils across Luquillo and Calhoun CZOs. Barcellos, D., and Thompson, A. (2017): Critical Zone Science: Current Advances and Future Opportunities, Arlington, VA, 4-6 June, 2017 Cross-CZO

2017

Parameterization of nitrogen limitation for a dynamic ecohydrological Model: A case study from the Luquillo Critical Zone Observatory. Bastola, Satish, and Rafael L Bras (2017): American Geophysical Union 2017 Fall Meeting, New Orleans, Louisiana, 11-15 December 2017

2017

Reviews and syntheses: on the roles trees play in building and plumbing the critical zone. Brantley, Susan L., David M. Eissenstat, Jill A. Marshall, Sarah E. Godsey, Zsuzsanna Balogh-Brunstad, Diana L. Karwan, Shirley A. Papuga, Joshua Roering, Todd E. Dawson, Jaivime Evaristo, Oliver Chadwick, Jeffrey J. McDonnell, Kathleen C. Weathers (2017): Biogeosciences, 14, 5115-5142 Cross-CZO National

2017

The influence of critical zone processes on the Mg isotope budget in a tropical, highly weathered andesitic catchment. Chapela Lara, M., Buss, H. L., Pogge von Strandmann, P. A. E., Schuessler, J. A., & Moore, O. W. (2017): Geochimica et Cosmochimica Acta

2017

Tropical river suspended sediment and solute dynamics in storms during an extreme drought. Clark, K.E., Shanley, J.B., Scholl, M.A., Perdrial, N., Perdrial, J.N., Plante, A.F., McDowell W.H. (2017): Water Resources Research

2017

Soil organic matter stabilization by Fe-C interactions in temperate and tropical soils: A cross-CZO comparison. Coward, E.K., Thompson, A., and Plante, A.F. (2017): Critical Zone Science: Current Advances and Future Opportunities, Arlington, VA, 4-6 June, 2017 Cross-CZO

2017

Iron-Carbon Complexation at the Critical Zone: Impacts of Metal Speciation and Ligand Structure. Coward, Elizabeth (2017): University of Pennsylvania

2017

Influence of Linked Hydrologic and Geomorphic Processes on the Terrestrial Carbon Cycle. Dialynas, Ioannis Minas (Yannis) (2017): Doctoral dissertation, School of Civil and Environmental Engineering, Georgia Institute of Technology Cross-CZO

2017

Soil Biology Research across Latitude, Elevation and Disturbance Gradients: A Review of Forest Studies from Puerto Rico during the Past 25 Years. González, G. (2017): Forests

2017

Optimized high-throughput methods for quantifying iron biogeochemical dynamics in soil. Huang, W., Hall S.J. (2017): Geoderma

2017

AGU Chapman Conference on Extreme Climate Event Impacts on Aquatic Biogeochemical Cycles and Fluxes. Inamdar, A. McDowell W.H., Shanley J.B., Minor E., Park, J. (2017): https://sites.google.com/a/udel.edu/chapmanece/home

2017

Conference Program - AGU Chapman Conference on Extreme Climate Event Impacts on Aquatic Biogeochemical Cycles and Fluxes. Inamdar, S., McDowell W.H., Shanley J. B., Minor E., Park J. (2017): AGU Chapman Conference, San Juan, PR 2017 Cross-CZO National

2017

Differential chemical fractionation of dissolved organic matter during sorption by Fe mineral phases in a tropical soil from the Luquillo Critical Zone Observatory. Plante, Alain F., Elizabeth Coward, Tsutomu Ohno, Aaron Thompson (2017): American Geophysical Union 2017 Fall Meeting, New Orleans, Louisiana, 11-15 December 2017

2016

Reviews and syntheses: measuring ecosystem nitrogen status – a comparison of proxies. Almaraz, M. and Porder, S. (2016): Biogeosciences

2016

Nitrogen Availability and Loss from Managed and Unmanaged Ecosystems. Almaraz, Maya. (2016): Brown University

2016

Approaches to stream solute load estimation for solutes with varying dynamics from five diverse small watersheds. Aulenbach, B. T., D. A. Burns, J. B. Shanley, R. D. Yanai, K. Bae, A. D. Wild, Y. Yang, and D. Yi. (2016): Ecosphere

2016

The role of pH, organic matter composition and mineralogy on the sorption behavior of beryllium . Boschi, V., Willenbring, J.K. (2016): Environmental Chemistry

2016

Beryllium Desorption from Minerals and Organic Ligands Over Time. Boschi, V., Willenbring, J.K. (2016): Chemical Geology

2016

Belowground Response to Drought in a Tropical Forest Soil I Changes in Microbial Functional Potential and Metabolism. Bouskill,Nick Wood,Tana E Baran ,Richard Hao, Zhao Ye, Zaw Bowen, Benjamin P Lim, HsiaoChien Nico, Peter Holman, Hoi-Ying Gilbert, Benjamin Silver, Whendee Northen, Trent R Brodie, Eoin L (2016): Frontiers in Microbiology

2016

Belowground response to drought in a tropical forest soil II Change in microbial function impacts carbon composition. Bouskill,Nick Wood,Tana E Baran, Richard Hao, Zhao Ye, Zaw Bowen, Benjamin P Lim, HsiaoChien Nico, Peter Holman, Hoi-Ying Gilbert, Benjamin Silver, Whendee Northen, Trent R Brodie, Eoin L (2016): Frontiers in Microbiology

2016

Soil organic matter stabilization by Fe-C interactions in temperate and tropical soils: A cross-CZO comparison. Coward, E.K., Thompson, A., Markewitz, D., Richter, D. deB., and Plante, A.F. (2016): Soil Science Society of America Annual Meeting, Phoenix, AZ, 6-9 November 2016 Cross-CZO

2016

Impact of hydrologically driven hillslope erosion and landslide occurrence on soil organic carbon dynamics in tropical watersheds. Dialynas,Y.G., Bastola, S., Bras, R.L., Marin-Spiotta, E., Silver, W.L., Arnone, E., and Noto, L.V. (2016): Water Resources Research 52(11): 8895-8919 Cross-CZO

2016

Carbon, nitrogen, and water stable isotopes in plant tissue and soils across a moisture gradient in Puerto Rico. Evaristo, J. and McDonnell J. J. (2016): Hydrological Processes

2016

Iron addition to soil specifically stabilized lignin. Hall, Steven J. Silver, Whendee L. Timokhin, Vitaliy I. Hammel, Kenneth E. (2016): Soil Biology and Biochemistry

2016

Effects of Hurricane-Felled Tree Trunks on Soil Carbon, Nitrogen, Microbial Biomass, and Root Length in a Wet Tropical Forest. Lodge D.J., Winter D., González G., Clum N. (2016): Forests

2016

Variation of organic matter quantity and quality in streams at Critical Zone Observatory watersheds. Miller, Matthew P., Boyer, Elizabeth W., McKnight, Diane M., Brown, Michael G., Gabor, Rachel S., Hunsaker, Carolyn T., Iavorivska, Lidiia, Inamdar, Shreeram, Johnson, Dale W., Kaplan, Louis A., Lin, Henry, McDowell, William H., Perdrial, Julia N. (2016): Water Resources Research, 52 (10): 8202–8216 Cross-CZO

2016

Representation of diffusion controlled carbon stabilization in reactive transport models. Thompson, A., Druhan, J.L., Keiluweit, M., Wagai, R., Plante, A.F., Lawrence, C.R., Berhe, A.A., Sierra, C.A., Rasmussen, C., Marin-Spiotta, E., Blankinship, J.C., Schimel, J., Heckman, K.A., Crow, S.E., and Wieder, W.R. (2016): American Geophysical Union 2016 Fall Meeting, San Francisco, CA Cross-CZO

2016

Physical, Chemical, and Biological Properties of Soil under Decaying Wood in a Tropical Wet Forest in Puerto Rico. Zalamea, M., González, G., Lodge D.J. (2016): Forests

2015

Geographic, environmental and biotic sources of variation in the nutrient relations of tropical montane forests. Dalling, J.W., Heineman, K., González, G., and Ostertag, R. (2015): Journal of Tropical Ecology

2015

Spatial patterns in oxygen and redox sensitive biogeochemistry in tropical forest soils. Daniel Liptzin, And Whendee L. Silver (2015): Ecosphere

2015

Limited uptake on nutrient input from sewage effluent in a tropical landscape. Figueroa Nieves, D, McDowell, W. H., Potter. J.D. and Martinez, G. (2015): Freshwater Science

2015

Large fluxes and rapid turnover of mineral-associated carbon across topographic gradients in a humid tropical forest: insights from paired 14C analysis. Hall, S.J., McNicol, G., Natake T., Silver W.L. (2015): Biogeosciences

2015

High mercury wet deposition at a “clean air” site in Puerto Rico. J.B. Shanley, M. Engle, M.A. Scholl, D. Krabbenhoft, R. Brunette, M.E. Conroy (2015): Environmental Science and Technology

2015

Relating microbial community structure and geochemistry in deep regolith developed on volcaniclastic rock in the Luquillo Mountains, Puerto Rico. Liermann, L.J., I. Albert, H.L. Buss, M. Minyard, S.L. Brantley (2015): Geomicrobiology Journal

2015

Spatial variability of African dust in soils in a montane tropical landscape in Puerto Rico. McClintock, M. A., Brocard, G., Willenbring, J., Tamayo, C., Porder, S., & Pett-Ridge, J. C. (2015): Chemical Geology

2015

Linking geomorphology, weathering and cation availability in the Luquillo Mountains of Puerto Rico. Porder S., Johnson A.H., Xing H.X., Brocard G., Goldsmith S. PettRidge J. ( (2015): 10.1016/j.geoderma.2015.03.002

2015

Lignin decomposition is sustained under fluctuating redox conditions in humid tropical forest soils. Steven J. Hall, Whendee L. SIilver, Vitaliy I. Timokhin and Kenneth E. Hammel (2015): Global Change Biology

2015

Reducing conditions, reactive metals, and their interactions can explain spatial patterns of surface soil carbon in a humid tropical forest. Steven J. Hall, Whendee L. Silver (2015): Biogeochemistry

2015

Parent material and vegetation influence bacterial community structure and nitrogen functional genes along deep tropical soil profiles at the Luquillo Critical Zone Observatory. Stone, M.M., Kan, J.J., Plante A.F. (2015): Soil Biology & Biochemistry

2015

Relating the biological stability of soil organic matter to energy availability in deep tropical soil profiles. Stone, M.M., Plante, A.F. (2015): Soil Biology and Biochemistry

2015

Fe2+ catalyzed iron atom exchange and re-crystallization in a tropical soil. Tishchenko, V., Meile, C., Scherer, M. M., Pasakarnis, T. S., and Thompson, A. (2015): Geochimica et Cosmochimica Acta

2015

57Fe isotope labeling of reactive Fe solid phases during redox transitions in a tropical forest soil using variable temperature Mössbauer spectroscopy. Wilmoth, J. and Thompson, A. (2015): Southeastern Biogeochemistry Symposium, 2015. Atlanta, GA,.

2014

Fe-C associations and soil organic matter stability in tropical soils of two contrasting parent materials . Coward EK & AF Plante (2014): SOM6 workshop. Kiawah Island, SC

2014

Soil carbon and Iron . Aaron Thompson (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR

2014

Landscape-scale variation in nitrogen cycling across the Luquillo Experimental Forest, Puerto Rico. Almaraz, M., Lu H.S., Goldsmith S., Porder S. (2014): 99th ESA Annual Meeting (August 10 -- 15, 2014)

2014

Controls on the Mg cycle in the tropics: insights from a case study at the Luquillo Critical Zone Observatory . Chapela Lara M., Buss H.L., Pogge von Strandmann P.A.E. (2014): Procedia Earth and Planetary Science

2014

Fe-C associations and soil organic matter stability . Coward, EK (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR.

2014

Soil carbon and Iron. Diego Barcellos (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR.

2014

Separate effects of flooding and anaerobiosis on soil greenhouse gas emissions and redox sensitive biogeochemistry. Gavin McNicol, Whendee L. Silver (2014): Journal of Geophysical Research: Biogeosciences

2014

Breaking the enzymatic latch: Impacts of reducing conditions on hydrolytic enzyme activity in tropical forest soils. Hall S.J., Treffkorn J., Silver W.L. (2014): Ecology

2014

Warming Experiment Microbiology. Jennifer Pett-Ridge (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR.

2014

Controls on soil carbon stocks in El Yunque National Forest, Puerto Rico. Johnson A.H., Hao Xing Xing, Scatena F.N. (2014): SSSAJ

2014

Tracking evolution of urban biogeochemical cycles: past,present, and future. Kaushal, S.S., McDowell, W.H. and Wollheim, W.M. (2014): Biogeochemistry

2014

O2 – sensor array. Leilei Ruan (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR

2014

Changes in Carbon Chemistry and Stability Along Deep Tropical Soil Profiles at the Luquillo Critical Zone Observatory. Madeleine Stone (2014): AGU Fall Meeting. San Fransisco, CA

2014

Long-term N dynamics in a tropical forest: Observations, inferences, and unanswered questions. McDowell, W. H. (2014): USGS National Headquarters Reston, VA. USGS National Headquarters Reston, VA

2014

Soil Nitrogen. Stephen Porder (2014): All-hands Meeting of the Luquillo Critical Zone Observatory, Luquillo, PR

2014

Soil microbial communities and soil organic matter: composition and ecological functions in the Luquillo Critical Zone. Stone M.M., Plante A.F. (2014): University of Pennsylvania

2014

Changes in extracellular enzyme activity and microbial community structure with soil depth at the Luquillo Critical Zone Observatory. Stone, M.M., DeForest, J.L., Plante, A.F. (2014): Soil Biology & Biochemistry

2014

Changes in phosphatase kinetics with soil depth across a variable tropical landscape. Stone, M.M., Plante, A.F. (2014): Soil Biology & Biochemistry

2014

Geomorphologic influences on tropical soil weathering and nutrient status. Tamayo C.D., Brocard G., Porder S., (2014): 99th ESA Annual Meeting (August 10 -- 15, 2014)

2014

Fe2+ catalyzed iron atom exchange and re-crystallization in soils from the Luquillo Critical Zone Observatory . Thompson A., Tishchenko V., Meile C., Scherer M., Pasakarni T. (2014): Goldschmidt2014

2014

Differential effects of canopy trimming and litter deposition on litterfall and nutrient dynamics in a wet subtropical forest. Whendee L. Silver, Steven J. Hall, Grizelle González (2014): Forest Ecology and Management

2014

Differential effects of canopy disturbance and litter deposition on litterfall and nutrient dynamics following a simulated hurricane in a tropical forest. Whendee L. Silver, Steven J. Hall, Grizelle González (2014): 99th ESA Annual Meeting

2014

Decoupling of sulfur and nitrogen cycling due to biotic processes in a tropical rainforest. Yi-Balan, S.A., Amundson, R., Buss, H.L. (2014): Geochimica et Cosmochimica Acta.

2013

Pre-exposure to short-term drought increases the resistance of subtropical forest soil bacterial communities to extended drought. Bouskill, N. J., H. C. Lim, S. Borglin, R. Salve, T. E. Wood, W. L. Silver, and E. L. Brodie. (2013): ISME Journal

2013

Probing the deep critical zone beneath the Luquillo Experimental Forest, Puerto Rico. Buss, H.L., Brantley, S.L., Scatena, F.N., Bazilievskaya, E.A., Blum, A., Schulz, M., Jimenez, R., White, A.F., Rother, G. and Cole, D. (2013): Earth Surface Processes and Landforms

2013

Regolith formation rate from U-series nuclides: Implications from the study of a spheroidal weathering profile in the Rio Icacos watershed (Puerto Rico). Chabaux, F. Blaes, E. Stille, P. Roupert, R. D. Pelt, E. Dosseto, A. Ma, L. Buss, H. L. Brantley, S. L. (2013): Geochimica et Cosmochimica Acta

2013

Mg isotopes: insights into weathering in tropical volcanoclastic regolith. Chapela Lara, M., Buss, H.L., Pogge Von Strandman, P.A.E., Dessert, C. Gaillardet, J. (2013): Goldschmidt2013 Conference Abstracts. Florence Italy.

2013

Changes in microbial dynamics during long-term decomposition in tropical forests. DeAngelisa, K.M., Chivian, J.L,, Fortneye, J.L., Arkin, A.P, Simmons, B., Hazen, T.C., Silver, W.L. (2013): Soil Biology and Biochemistry

2013

Iron oxidation stimulates organic matter decomposition in humid tropical forest soils. Hall S.J., Silver W.L. (2013): Global Change Biology

2013

Iron Redox Cycling Drives Decomposition of Mineral-Associated C in Humid Tropical Forest Soils. Hall, S. J., G. McNicol, and W. L. Silver (2013): AGU Fall Meeting. San Fransisco, CA

2013

When Wet Gets Wetter: Decoupling of Moisture, Redox Biogeochemistry, and Greenhouse Gas Fluxes in a Humid Tropical Forest Soil. Hall, S.J., McDowell W.H., Silver W.L. (2013): Ecosystems

2013 (In Press)

The Architecture of Deep Weathering at Two CZOs: Groudnwater, Regolith, and Solutes at Susquehanna Shale Hills and Luquillo Experimental Forest. Hynek, S.A., Orlando, J.J., Sullivan, P., Brantley, S.L. (2013): GSA Annual Meeting, Denver, CO , 27-30 October, 2013.

2013

Parent material and topography determine soil phosphorus status in the Luquillo Mountains of Puerto Rico. Mage S.M., Porder S. (2013): Ecosystems

2013

African Dust and Clouds at Pico del Este: The Puerto Rico African Dust and Cloud Study . Mayol-Bracero, O. L. (2013): AGU Fall Meeting. San Fransisco, CA

2013

Interactions between lithology and biology drive the long-term response of stream chemistry to major hurricanes in a tropical landscape. McDowell, W.H., Brereton R.L., Scatena F.N. Shanley J.B., Brokaw N.V., Lugo A.E. (2013): Biogeochemistry

2013

Carbon losses from the Critical Zone: Quantifying the effects of lithology and urbanization on concentrations of organic and inorganic carbon in coastal montane tropical rivers. McDowell, W.H., Scatena, F.N., Ramirez, A., Potter, J.D. (2013): SE Section Annual Meeting, Geological Society of America

2013

Non-linear response of soil carbon gas (CO2, CH4) flux to oxygen availability. McNicol, G. and W.L. Silver (2013): ESA Annual Meeting. Sacramento, California

2013

Porosity and surface area evolution during weathering of igneous rocks. Navarre-Sitchler A., Cole D., Rother G., Jin L., Buss H.L., and Brantley S. (2013): Geochim. Cosmochim. Acta

2013

Drilling and GPR in the Rio Icacos Watershed if the Luquillo CZO, Puerto Rico: Weathering Processes and Architecture of the Deep Critical Zone. Orlando, J.J., Hynek, S.A., Comas, X., Buss, H.L., Brantley, S.L. (2013): Geological Society of America

2013

Linking geomorphology, weathering and soil cations in the Luquillo Mountains of Puerto Rico. Porder, S. Johnson, A.H., Xing H., Brocard G.Y., Goldsmith S.T. (2013): 2013 Fall Meeting, AGU, San Francisco, Calif

2013

Silver, W L, S J Hall, and G Gonzalez (2013) Differential effects of canopy disturbance and litter deposition on litterfall and nutrient dynamics following a simulated hurricane in a tropical forest (oral presentation). Silver, W. L., S. J. Hall, and G. Gonzalez (2013): ESA Annual Meeting. Minneapolis, Minnesota

2013

Dynamics of Redox Reactions Structure Decomposition and Greenhouse Gas Fluxes in Humid Tropical Forest Soils. Steven J. Hall (2013): University of California - Berkeley

2013

Plant and nutrient controls on microbial functional characteristics in a tropical Oxisol. Stone M.M., Plante A.F., Casper, B.B. (2013): Plant and Soil

2013

Soil Organic Matter and Microbial Activity in Critical Zone of Tropical Soils from Luquillo, Puerto Rico. Stone, M.M., Plante, A.F. (2013): Goldschmidt2013 Conference Abstracts. Florence Italy.

2013

Sensitivity of Soil Respiration to Variability in Soil Moisture and Temperature in a Humid Tropical Forest. Wood, T. E., M. Detto, and. W. L. Silver (2013): PLoS ONE

2012

Water quality and landscape processes of four watersheds in eastern Puerto Rico. Buss H.L., and White A.F. (2012): USGS

2012

Geological and biological influence on soil and foliar δ15N in the Luquillo Mountains of Puerto Rico. Lu H.S., Mage S., Porder S. (2012): ESA 2012

2012

Bacterial Associations with Weathering Minerals at the Regolith-Bedrock Interface, Luquillo Experimental Forest, Puerto Rico. Minyard, M.L., Brunsm M.A., Liermann, L.J., Buss H.L., Brantley, S.L. (2012): Geomicrobilogy

2012

Just passing through --- high Hg deposition to Puerto Rico forest moves quickly off the landscape. Shanley, J. B, J.K. Willenbring, J. Kaste, M. Occhi, W.H. McDowell (2012): AGU Annual fall meeting

2011

Geochemical Model of Redox Reactions in a Tropical Rain Forest Stream Riparian Zone: DOC Oxidation, Respiration and Denitrification. Jiménez R.A., (2011): Master's Capstone and Thesis. University of Pennsylvania