Research

Anthony Aufdenkampe

Anthony K. Aufdenkampe Ph.D.

Associate Research Scientist

970 Spencer Road

Avondale, PA 19311

610.268.2153 x 263

610.268.0490 Fax

Email

Principal Investigator of the Organic and Isotope Geochemistry group

Adjunct Assistant Professor, Oceanography Program, College of Marine and Earth Studies, University of Delaware

Adjunct Faculty, Delaware Environmental Institute (DENIN), University of Delaware

Research Interests

Education

Ph.D. 2002. Chemical Oceanography, University of Washington. Advisor: John I. Hedges and Jeffrey E. Richey. Dissertation: The Role of Sorptive Processes in the Organic Carbon and Nitrogen Cycles of the Amazon River Basin.

M.Sc. 1998. Chemical Oceanography, University of Washington. Advisors: John I. Hedges and James W. Murray. Thesis: Controls on New Production Along the Equator in the Western and Central Pacific.

B.A. 1991, cum Laude. Chemistry, Dartmouth College. Advisor: Dean E. Wilcox. Senior Honors Thesis: Solid-Phase Synthesis and Characterization of the β-Domain of Human Liver Metallothionein II.

Previous Positions

NSF Postdoctoral Fellow, NSF International Research Fellowship Program. Supervisors: Ron Benner, University of South Carolina; and Alex Krusche, Centro de Energia Nuclear na Agricultura (CENA), Brazil. April 2002-December 2002.

Current Research

Molecular Tracers of Contamination

As part of Stroud Water Research Center’s 6-year NY Watersheds Project, the objectives the Molecular Tracers group are to identify the sources and assess the magnitude of contamination to the watersheds that feed NY City’s drinking water supplies. At over 100 stream and river sites, we are analyzing the concentrations of 22+ organic compounds. These include caffeine, laundry detergent fragrances and fecal steroids, which act as indicators of waste water treatment plant effluent, septic system failure and pathogens that may come from human, agricultural, and wildlife sources. We also measure polyaromatic hydrocarbons (PAHs), which are known, petroleum and combustion byproducts, to track urban and suburban runoff. The spatial and temporal patterns of these contaminants will eventually provide a tool to help guide limited resources toward management of these watershed. Collaborators: Bernard Sweeney, Charles Dow, Louis Kaplan, John Jackson, Tom Bott and Denis Newbold.

Carbon Dioxide Outgassing from Tropical Rivers

We recently estimated that tropical rivers return about 1 gigaton per year of carbon as carbon dioxide to the atmosphere (see Publications, Richey et al. Nature, 2002). This flux nearly rivals the amount of carbon released annually by deforestation, and as such our findings have received considerable press (see USA Today, WhyFiles, and University of Washington press release). Our latest results (see Publications, Mayorga et al. Nature, 2005) show that this outgassing carbon dioxide is driven by respiration of terrestrial organic carbon that is less than five years old (see press release). We are currently conducting a broad survey of carbon dioxide concentrations in rivers of South America and South East Asia to better constrain the fluxes to the atmosphere and the ultimate sources of this carbon. Collaborators: Jeff Richey, Emilio Mayorga, Paul Quay, Alan Devol, Simone Alin (Univ. of Washington); Alex Krusche (CENA).

River Metabolism within the Amazon Basin

Continuing work initiated during Post-Doctoral research, we are examining results and samples from river water incubation experiments in order to explore factors that control organic matter degradation dynamics as a function of its elemental and biochemical composition by size class. Multiple hypotheses have been suggested in the literature, but this is the first study to examine several controlling factors simultaneously. In addition, these field experiments have been designed to provide important constraints on parameterization of a new “River basin Organic Matter and Biogeochemistry Synthesis” model (ROMBUS) that I am currently developing in conjunction with the Carbon in the Amazon River Experiment (CAMREX) group at the University of Washington. Collaborators: Ronald Benner (Univ. South Carolina); Alex Krusche (CENA).

Radiocarbon Constraints on Organic Matter Turnover in the Amazon River Basin

The objectives of this project are to: 1) Survey spatial and temporal variability in Δ 14C signatures of dissolved, fine particulate and course particulate organic carbon (DOC, FPOC and CPOC) and dissolved inorganic carbon (DIC) between basins of differing types and sizes; and to 2) Constrain age, turnover and pathways of these principal carbon fractions for the first phase of implementation and validation of a new “River basin Organic Matter and Biogeochemistry Synthesis” model (ROMBUS). Collaborators: Emilio Mayorga, John Hedges and Jeff Richey (Univ. of Washington); Carrie Massiello and Tom Brown (Center for Accelerator Mass Spectrometry).

Competition for Organic Molecules by Biodegradation and Sorption to Minerals

In the environment, the composition natural organic matter is largely determined by its interactions with heterotrophic microorganisms and with mineral surfaces. Both biodegradation and sorption processes are highly selective — some molecules and molecular classes are degraded and sorbed in preference to others. The question thus arises as to what the interplay is between these two processes in determining organic matter composition, turnover and transport. Collaborators: John Hedges (Univ. of Washington).

Compositional Evolution of Dissolved Organic Matter in Rivers

If biodegradation and sorption together determine the molecular composition of organic matter, what might be the expected compositional trends downstream in a river system largely devoid of fine minerals (Rio Negro, Brazil) versus one that carries high suspended mineral loads (Rio Solimoes, Brazil). We are exploring the use of one and two dimensional liquid state NMR to explore trends in organic matter composition within these two river systems. Collaborators: Norbert Hertkorn and Philippe Schmitt (GSF); John Hedges (Univ. of Washington).

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Publications

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Yoo, K., J. Ji, A. Aufdenkampe, and J. Klaminder. 2011. Rates of soil mixing and associated carbon fluxes in a forest vs. tilled agricultural field: implications for modeling the soil carbon cycle. Journal of Geophysical Research - Biogeosciences. doi: 10.1029/2010JG001304. Request PDF.

Aufdenkampe, A. K., E. Mayorga, P. A. Raymond, J. M. Melack, S. C. Doney, and S. R. Alin. 2011. Riverine coupling of biogeochemical cycles between land, oceans, and atmosphere. Frontiers in Ecology and the Environment 9(1): 53-60, doi:10.1890/100014. Request PDF.

Melack, J., A. C. Finzi, D. Siegel, S. MacIntyre, C. Nelson, A. K. Aufdenkampe, and M. Pace. 2011. Improving biogeochemical knowledge through technological innovation. Frontiers in Ecology and the Environment 9(1): 37-43, doi:10.1890/100004. Request PDF.

Davidson, E., R. Figueiredo, D. Markewitz , A. K. Aufdenkampe. 2010. Dissolved CO2 in Small Catchment Streams of Eastern Amazonia: A Minor Pathway of Terrestrial Carbon Loss. Journal of Geophysical Research – Biosciences.  115, G04005, doi:10.1029/2009JG001202 . Request PDF.

Battin, T. J., S. Luyssaert, L. A. Kaplan, A. K. Aufdenkampe, A. Richter, and L. J. Tranvik. 2009. The boundless carbon cycle. Nature Geoscience 2, 598 – 600, doi:10.1038/ngeo618. Request PDF.

Sollins, P., M. Kramer, C. Swanston, K. Lajtha, T. Filley, A. K. Aufdenkampe, R. Wagai and R. D. Bowden. 2009. Sequential Density Fractionation across Soils of Contrasting Mineralogy: Evidence for both Microbial- and Mineral-Controlled Soil Organic Matter Stabilization. Biogeochemistry 96(1-3), 209-231, DOI: 10.1007/s10533-009-9359-z. Request PDF.

Spencer, R. G. M., A. Stubbins, P. J. Hernes, A. Baker, K. Mopper, A. K. Aufdenkampe, R. Y. Dyda, V. L. Mwamba, A. M. Mazedi, et al. 2009. Photochemical degradation of dissolved organic matter and dissolved lignin phenols from the Congo River. Journal of Geophysical Research-Biogeosciences, 114, G03010, doi:10.1029/2009JG000968. Request PDF.

Richardson, D. C., L. A. Kaplan, J. D. Newbold and A. K. Aufdenkampe. 2009. Temporal dynamics of seston: A recurring nighttime peak and seasonal shifts in composition in a stream ecosystem. Limnology and Oceanography 54(1): 344–354. Request PDF.

Aufdenkampe, A. K., E. Mayorga, J. I. Hedges, C. Llerena, P. D. Quay, J. Gudeman, A. V. Krusche and J. E. Richey. 2007. Organic matter in the Peruvian headwaters of the Amazon: Compositional evolution from the Andes to the lowland Amazon mainstem. Organic Geochemistry 38(3): 337-364. Request PDF.

Hernes, P. J., A. C. Robinson and A. K. Aufdenkampe. 2007. Fractionation of lignin during leaching and sorption and implications for organic matter “freshness”. Geophysical Research Letters 34: L17401, doi:17410.11029/12007GL031017. Request PDF.

Aufdenkampe, A.K., D.B. Arscott, C.L. Dow, and L.J. Standley. 2006. Molecular tracers of soot and sewage contamination in streams supplying New York City drinking water. Journal of the North American Benthological Society 25:928-953. Request PDF.

Kaplan, L. A., J. D. Newbold, D. J. Van Horn, C. L. Dow, A. K. Aufdenkampe, and J. K. Jackson. 2006. Organic matter transport in New York City drinking-water-supply watersheds. Journal of the North American Benthological Society 25:912-927. DOI: 10.1899/0887-3593(2006)025[0912:OMTINY]2.0.CO;2 .

Kratzer, E. B., J. K. Jackson, D. B. Arscott, A. K. Aufdenkampe, C. L. Dow, L. A. Kaplan, J. D. Newbold, and B. W. Sweeney. 2006. Macroinvertebrate distribution in relation to land use and water chemistry in New York City drinking-water-supply watersheds. Journal of the North American Benthological Society 25:954-976. Request PDF.

Bott, T. L., D. S. Montgomery, J. D. Newbold, D. B. Arscott, C. L. Dow, A. K. Aufdenkampe, J. K. Jackson, and L. A. Kaplan. 2006. Ecosystem metabolism in streams of the Catskill Mountains (Delaware and Hudson River watersheds) and Lower Hudson Valley. Journal of the North American Benthological Society 25:1018-1044. Request PDF.

Sweeney, B. W., D. B. Arscott, C. L. Dow, J. G. Blaine, A. K. Aufdenkampe, T. L. Bott, J. K. Jackson, L. A. Kaplan, and J. D. Newbold. 2006. Enhanced source-water monitoring for New York City: summary and perspective. Journal  of the North American Benthological Society 25:1062-1067. Request PDF.

Krusche A. V., Ballester M. V. R., Victoria R. L., Bernardes M. C., Leite N. K., Hanada L., Marcondes R., Victoria D. d. C., Toledo A. M., Ometto J. P., Moreira M. Z., Gomes B. M., Bolson M. A., Neto S. G., Bonelli N., Deegan L., Neill C., Thomas S., Aufdenkampe A.K., and Richey J. E. 2005. Efeitos das mudanças do uso da terra na biogeoquímica dos corpos d’água da bacia do rio Ji-Paraná Rondônia. Acta Amazônica 35(2): 197 - 205. Request PDF.

Mayorga, E., A. K. Aufdenkampe, C. A. Masiello, A. V. Krusche, J. I. Hedges, P. D. Quay and J. E. Richey. 2005. Young organic matter as a source of carbon dioxide outgassing from Amazonian rivers. Nature 436(7050): 538-541. Request PDF. Request PDF of Nature News & Views article by Raymond 2005.

Bernardes, M. C., L. A. Martinelli, A. V. Krusche, J. Gudeman, M. Moreira, R. L. Victoria, J. P. H. B. Ometto, M. V. R. Ballester, A. K. Aufdenkampe, et al. 2004. Riverine organic matter composition as a function of land use changes, southwest Amazon. Ecological Applications 14(4): S263-S279. Request PDF.

Peterson, M. L., A. K. Aufdenkampe, S. Lang and J. I. Hedges. 2003. Dissolved organic carbon measurement using a modified high temperature DOC analyzer. Marine Chemistry, 81(1-2): 89 - 104. Request PDF.

Mayorga, E. and A. K. Aufdenkampe. 2002. The processing of bioactive elements by the Amazon River system. The Ecohydrology of South American Rivers and Wetlands. M. E. McClain. Wallingford, UK, IAHS Press. IAHS Special Publication No. 6: 1-24. Request PDF.

Richey, J. E., J. M. Melack, A. K. Aufdenkampe, V. M. Ballester and L. L. Hess. 2002. Outgassing from Amazonian rivers and wetlands as a large tropical source of atmospheric CO2. Nature, 416, 617-620. Request PDF. Request PDF of Nature News & Views, by Grace 2002.

Aufdenkampe, A. K. 2002. The Role of Sorptive Processes in the Organic Carbon and Nitrogen Cycles of the Amazon River Basin. Ph. D. Dissertation. University of Washington, School of Oceanography. Seattle. 164 pages.

Aufdenkampe, A. K., J. J. McCarthy, C. Navarette, M. Rodier, J. Dunne and J. W. Murray. 2002. Biogeochemical controls on new production in the tropical Pacific. Deep-Sea Research II, 49(13-14): 2619-2648. Equatorial Pacific Synthesis Special Issue. Request PDF.

Aufdenkampe, A. K., and J. W. Murray. 2002. Controls on new production: The role of iron and physical processes. Deep-Sea Research II, 49(13-14): 2649-2668. Equatorial Pacific Synthesis Special Issue. Request PDF.

Aufdenkampe, A. K., J. I. Hedges, A. V. Krusche, C. Llerena and J. E. Richey. 2001. Sorptive fractionation of dissolved organic nitrogen and amino acids onto sediments within the Amazon Basin. Limnology and Oceanography, 46(8), 1921-1935. Request PDF.

Aufdenkampe, A. K., J. J. McCarthy, M. Rodier, C. Navarette, J. P. Dunne and J. W. Murray. 2001. Estimation of new production in the tropical Pacific. Global Biogeochemical Cycles, 15(1): 101-113. Request PDF. Request PDF of correction.

Hedges, J. I., E. Mayorga, E. Tsamakis, M. E. McClain, A. K. Aufdenkampe, P. Quay, J. E. Richey, R. Benner, S. Opsahl, et al. 2000. Organic matter in Bolivian tributaries of the Amazon River: A comparison to the lower mainstem. Limnology and Oceanography 45(7): 1449-1466. Request PDF.

Dunne, J. P., J. W. Murray, A. K. Aufdenkampe, S. Blain and M. Rodier. 1999. Silicon-nitrogen coupling in the equatorial Pacific upwelling zone. Global Biogeochemical Cycles 13(3): 715-726. Request PDF.

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Recent Presentations

Aufdenkampe, A.K., K. Yoo, R. Aalto, C. Chen, C. Fernandez. 2009. Is mineral motion the ultimate control on critical zone carbon sequestration? Talk at the AGU Fall Meeting, Dec. 14-18, San Francisco CA.

Yoo, K., S.M. Mudd, C. Chen, A.K. Aufdenkampe, B. Weinman, J. Ji, M.D. Hurst, J. Klaminder. How does biological and anthropogenic soil mixing contribute to morphologic evolution of landscapes and terrestrial carbon cycles? Invited talk at the AGU Fall Meeting, Dec. 14-18, San Francisco CA.

Chen, C., K. Yoo, A.K. Aufdenkampe. 2009. Limiting factors for carbon-mineral complexation: Responses to land use types and the implications for carbon sequestration. Poster at the AGU Fall Meeting, Dec. 14-18, San Francisco CA.

Fernandez, C., K. Yoo, A.K. Aufdenkampe, C. Hale. 2009. Intensified Weathering Control of Carbon Cycle along an Earthworm Invasion Chronosequence: Preliminary Data. Poster at the AGU Fall Meeting, Dec. 14-18, San Francisco CA.

Mei, Y., G.M. Hornberger, L.A. Kaplan, J.D. Newbold, A.K. Aufdenkampe, Y. Tsang. Transient Dissolved Organic Carbon Through Soils. Poster at the AGU Fall Meeting, Dec. 14-18, San Francisco CA.

Aufdenkampe, A.K., D. Sparks, K. Yoo, L.A. Kaplan, J. Pizzuto, R. Aalto, et al. 2009. Christina River Basin CZO: Spatial and temporal integration of carbon and mineral fluxes: a whole watershed approach to quantifying anthropogenic modification of critical zone carbon sequestration. Invited Talk at 2nd Annual National CZO Program Meeting, Sep. 14-15, State College PA.

Tsang, Y., L.A. Kaplan, J.D. Newbold, A.K. Aufdenkampe, G.M. Hornberger. 2009. Simulation of discharge in a 3rd-order stream in the Pennsylvania Piedmont with a modified TOPMODEL. Poster at Gordon Research Conference on Catchment Science, Jul. 12-17, Andover NH.

L.A. Kaplan, J.D. Newbold, A.K. Aufdenkampe. 2009. Whole-stream measurement of semi-labile dissolved organic carbon (DOC) uptake. Poster at Gordon Research Conference on Catchment Science, Jul. 12-17, Andover NH.

Chen, C., K. Yoo, A.K. Aufdenkampe. 2009. Different limiting factors for carbon mineral complexation in soils across a land use gradient: forest vs. tilled agricultural sites. Poster at the International Symposium on Soil Organic Matter Dynamics, Jul. 6-9, Colorado Springs.

Feng, W., A.F. Plante, A. Conover, A.K. Aufdenkampe, J. Six. 2009. Can mineral specific surface area predict soil carbon stabilization capacity? Poster at the International Symposium on Soil Organic Matter Dynamics, Jul. 6-9, Colorado Springs.

Aufdenkampe, A.K., E. Mayorga, P.A. Bukaveckas, T.M. Jicha, T. Angradi, D. Bolgrien, J.H. Chick and J.E. Havel. 2009. Algal contributions to suspended organic matter: A novel approach applied to the US great rivers and the Amazon. Talk at the NABS 57th Annual Meeting, May 18-22, Grand Rapids MI.

Jicha, T.M. , B.H. Hill, X. Yuan, D.W. Bolgrien, T.R. Angradi, L.E. Anderson, P.A. Bukaveckas, A.K. Aufdenkampe. 2009. Water quality patterns in mid-continent great rivers. Talk at the NABS 57th Annual Meeting, May 18-22, Grand Rapids MI.

Bukaveckas, P.A., A.K. Aufdenkampe, J.H. Chick, J.E. Havel, T.R. Angradi, D.W. Bolgrien, T.M. Jicha, D.L. Taylor. Constraints on algal production in great rivers. Talk at the NABS 57th Annual Meeting, May 18-22, Grand Rapids MI.

Chick, J.H., J.E. Havel, P.A. Bukaveckas, A.K. Aufdenkampe, T.R. Angradi, D.W. Bolgrien, T.M. Jicha. 2009. Planktonic food-web development in large rivers: Lessons from EMAP-GRE. Talk at the NABS 57th Annual Meeting, May 18-22, Grand Rapids MI.

Aufdenkampe, A.K., K. Yoo, C. Hale. 2009. Acceleration of carbon & mineral cycles by biophysical soil mixing along an earthworm invasion chronosequence. USDA NRI Soil Processes Project Director Meeting, Apr. 8-9, E. Lansing MI.

Aufdenkampe, A.K., W.J. Ullman, R.L. Hays. 2009. The Role of a Salt Marsh in Processing Estuarine Carbon and Nitrogen: A Complete Species and Isotope Seasonal Balance. Talk at the Delaware Estuary Science and Environmental Summit, Jan. 11-14, Cape May NJ.

Hays, R.L. W.J. Ullman, Aufdenkampe, A.K.. 2009. Three approaches to calculating water, salt and nutrient balance in a tidal salt marsh. "Best Poster" award at the Delaware Estuary Science and Environmental Summit, Jan. 11-14, Cape May NJ.

Plante, A. F., A. K. Aufdenkampe, J. Six. 2008. How can we measure the soil carbon stabilization capacity? Talk at the AGU Fall Meeting, Dec. 15-19, San Francisco CA.

Spencer, R. G. M., A. P. Stubbins, P. J. Hernes, A. K. Aufdenkampe, P. Gulliver, K. Mopper, A. Baker, R. Dyda, J. Six. 2008. Geochemistry and reactivity of exported Congo Riverine dissolved organic matter. Talk at the AGU Fall Meeting, December 15-19, San Francisco CA.

Chen, C., A. K. Aufdenkampe, Yoo, K. 2008. Organic carbon-metal-mineral complexes in upland vs. riparian soils in a watershed with mixed land uses. Poster at the Geological Society of America (GSA) Joint Annual Meeting, Oct. 5-9, Houston, Texas, USA.

Aufdenkampe, A. K., E. Mayorga, R. Aalto, J. I. Hedges, C. A. Masiello, T. A. Brown, P. D. Quay, A. V. Krusche, J. E. Richey. 2008. The Role of Tropical Rivers in Regional and Global Carbon Budgets. Invited Speaker at Ecology Lunch Seminar, Dept. of Biology, Univ. of Pennsylvania, Sept. 17, Philadelphia, USA.

Aufdenkampe, A. K., R. Aalto, K. Yoo. 2008. Is mineral motion the ultimate control on carbon sequestration? Invited Speaker at the British Society of Geomorphology Annual Conference and General Meeting, July 2-4, Exeter, United Kingdom.

Bukaveckas, P. A., A. K. Aufdenkampe. 2008. Phytoplankton contributions to suspended particulate organic matter in rivers with comparisons to other freshwater environments. Talk at the ASLO Summer Meeting, June 8-13, St. John’s, Canada.

Aufdenkampe, A. K. 2008. A new approach to simultaneous determination of dissolved CO2/N2/O2/Ar, δ13C-CO2, δ15N-N2, and δ18O-O2 Poster at the Workshop for Advancing Methods for Measuring Denitrification in Terrestrial and Aquatic Systems, sponsored by the Denitrification Research Coordination Network , May 27-30, Horn Point Laboratory, Maryland, USA.

Richardson, D.C., A.K. Aufdenkampe, J.D. Newbold and L.A. Kaplan. 2008. Modeling sources of seston, particulate organic carbon and particulate nitrogen within a stream ecosystem. Talk at NABS Annual Meeting, May 25-30, Salt Lake City, USA.

Chick, J.H., Bukaveckas, P.A., Aufdenkampe, A.K., and J.E. Havel. 2008. Toward a new concept of planktonic food webs in large rivers. Three Invited Seminars in China co-sponsored by The Nature Conservancy and Yangtze River Fishery Resources Management Committee. May, Shanghai, Congqing, and Wuhan, China.

Aalto, R., , A. K. Aufdenkampe, M. Goni, R. Hilton, S. Alin, T. Dunne, W. Dietrich. 2008. Particle pathways, carbon cycles, and sequestration within fluvial dispersal systems. Invited presentation at the Meeting of Young Researchers in Earth Sciences (MYRES), May 20-13, New Orleans, USA.

Yoo, K., S. M. Mudd, A. K. Aufdenkampe. 2008. Chemical weathering rates from mineral grains to soils and to hillslopes. Invited presentation at the Meeting of Young Researchers in Earth Sciences (MYRES), May 20-13, New Orleans, USA.

Mayorga, E., A. K. Aufdenkampe, C. A. Masiello, A. V. Krusche, P. D. Quay, J. E. Richey, S. Seitzinger. 2007. Rejuvenation and aging of carbon in rivers: Sources, exports and interactions among fractions in the Amazon and other systems. Invited talk at the AGU Fall Meeting, December 10-14, San Francisco CA

Bukaveckas, P.A., A.K. Aufdenkampe. 2007. Effects of autochthonous production on the biogeochemical properties of riverine seston. Poster at the Estuarine Research Federation Annual Meeting, November 4-8, Providence RI.

Aufdenkampe, A. K., E. Mayorga, P. J. Hernes, P. A. Bukaveckas. 2007. Mineral complexation as a primary control on organic matter in large rivers. Selected Speaker at the 3rd International Conference on Mechanisms of Organic Matter Stabilisation and Destabilisation in Soils and Sediments, September 23-26, Adelaide, Australia.

Aufdenkampe, A. K., E. Mayorga, J. I. Hedges, C. A. Masiello, T. A. Brown, M. E. McClain, C. A. Llerena, P. D. Quay, A. V. Krusche, J. E. Richey. 2007. The Evolution of Organic Matter in the Amazon River System: Trends in Radiocarbon, Amino Acid and Lignin Phenol Composition. Invited Speaker at the American Chemical Society (ACS) National Meeting, August 19-23, Boston, USA.

Aufdenkampe, A. K., E. Mayorga, J. I. Hedges, C. A. Masiello, T. A. Brown, P. D. Quay, A. V. Krusche, J. E. Richey. 2007. The two contrasting carbon cycles of the Amazon River system: Rapid turnover of most organic matter versus transport of refractory remains. Invited Speaker at European Geosciences Union (EGU) Annual Meeting, April 16-20, Vienna, Austria.

Bukaveckas, P.A., A.K. Aufdenkampe. 2007. Autochthonous Production and Seston Stoichiometry – A Comparative Study of the Ohio, Upper Mississippi and Missouri Rivers. Talk at the ASLO Aquatic Sciences Meeting, January 4-9, Santa Fe NM.

Aufdenkampe, A. K., R. E. Aalto, L. Maurice-Bourgoin. 2006. Carbon Sequestration by Coupled Landslide/Floodplain Deposition during Large Storms in River Basins of the Andean Amazon. Invited Speaker at AGU Fall Meeting, December 11-15, San Francisco CA.

Ellis, E.E., A.K. Aufdenkampe, P.D. Quay, A.V. Krusche, S.R. Alin, and J.E. Richey. 2006. Factors Controlling Net Water Column Respiration Rates in Riverine Ecosystems of the Amazon Basin. Talk at AGU Fall Meeting, December 11-15, San Francisco CA.

Aufdenkampe, A.K. 2006. Global Warming: The Data, the Consequences, Our Choices. Invited Speaker for the Milliken family annual business meeting, November 5, Avondale PA.

Aufdenkampe, A.K. 2006. The Amazon: the Role of Rivers in Global Warming. Invited Speaker for the Lower Merion Conservancy, October 12, Gladwyne, PA.

Dow, C.L., A.K. Aufdenkampe. 2006. Using SAS to improve the quantification of environmental chemistry samples. Talk at the North East SAS User’s Group (NESUG) Annual Meeting, September 17-20, Philadelphia, PA.

Bukaveckas, P.A., K. Acharya, K., A.K. Aufdenkampe, J.D. Jack, A. Macdonald. 2006. Hydrogeomorphic Constraints on Autotrophic Production in Large Rivers and Implications for Consumer Nutrition. Talk at the International Conference on Riverine Hydroecology: Advances in Research and Applications, August 14-18, Stirling, Scotland.

Aufdenkampe, A.K., E. Mayorga, J. I. Hedges, C.A. Masiello, T.A. Brown, M. E. McClain, C. A. Llerena, P. D. Quay, A. V. Krusche, J. E. Richey. 2006. The Evolution of Organic Matter in the Amazon River System: Trends in Radiocarbon, Amino Acid and Lignin Phenol Composition. Invited Speaker in “Hot Topics in Organic Biogeochemistry” Session of the Gordon Research Conference in Organic Geochemistry, August 6-11, Holderness School NH.

Carter,L.G., A.K. Aufdenkampe, D.B. Arscott, C.L. Dow. 2006. Molecular Tracer Analysis in Water Quality: End Member Analysis. Talk at the North American Benthological Society’s Annual Meeting, June 4-9, Anchorage, AK.

Arscott, D.B., J.K. Jackson, E.B. Kratzer, C.L. Dow, J.D. Newbold, A.K. Aufdenkampe, K.A. Kaplan, T.L. Bott, and B.W. Sweeney. Using macroinvertebrate communities to assess anthropogenic impacts in New York City’s surface water supply catchments. Talk at the North American Benthological Society’s Annual Meeting, June 4-9, Anchorage, AK.

Dow, C.L., D.B. Arscott, A.K. Aufdenkampe, T.L. Bott, L.G. Carter, J.K. Jackson, L.A. Kaplan, J.D. Newbold, and B.W. Sweeney. Enhanced monitoring effort in New York City’s drinking-water-supply watershed. Talk at the North American Benthological Society’s Annual Meeting, June 4-9, Anchorage, AK.

Kaplan, L.A., J.D. Newbold, T.N. Wiegner, P.H. Ostrom, H. Gandhi, A.K. Aufdenkampe. 2006. Biological Lability Profiling of Dissolved Organic Matter with Bioreactors – Scaling Up Laboratory Results to the Environment. Talk at the ASLO Summer Meeting, June 4-9, Victoria BC.

Aufdenkampe, A. K., R. E. Aalto, L. Maurice-Bourgoin. 2006. ENSO-Orchestrated Carbon Sequestration in Andean-Amazon River Basins by Erosion-Sedimentation Processes. Talk at AGU Joint Assembly, May 23-26, Baltimore MD.

Aufdenkampe, A.K., J. I. Hedges. 2006. Is the characteristic elemental, isotopic and biochemical composition of mineral-associated organic matter in soils and sediments the consequence of sorption? Invited Seminar at the Dept. of Civil and Environmental Engineering, Univ. of Delaware, May 5, Newark DE.

Aufdenkampe, A.K., E. Mayorga, A. V. Krusche, C.A. Masiello, J. I. Hedges, P. D. Quay, J. E. Richey, T.A. Brown. 2006. An Important Role for Rivers in Regional and Global Carbon Budgets? Invited Seminar at the Virginia Institute for Marine Science, April 25, Gloucester Point VA.

Aufdenkampe, A.K., E. Mayorga, A. V. Krusche, C.A. Masiello, J. I. Hedges, P. D. Quay, J. E. Richey, T.A. Brown. 2006. An Important Role for Rivers in Regional and Global Carbon Budgets? Invited Seminar at the Dept. Biology, Virginia Commonwealth Univ., April 24, Richmond VA.

Aufdenkampe, A.K. 2006. The Global Water Crisis. Invited Speaker at the Robb Fox Environmental Lecture, March 22, Lower Merion High School, PA.

Aufdenkampe, A.K. 2006. Missing Carbon: The Amazon River and Global Warming. Science of the Stroud Water Research Center Winter Lecture Series, January 12, Avondale PA.

Bukaveckas, P.A., A.K. Aufdenkampe. 2006. Characterization of suspended particulate matter in rivers: Utility for monitoring and assessment. Talk at the EPA EMAP Great River Ecosystems Reference Condition Workshop, January 10-11, Cincinnati OH.

Aufdenkampe, A. K., L. Carter, D. B. Arscott, C. L. Dow and L. J. Standley. 2005. Molecular tracers of soot and sewage contamination in the upper Delaware River. Invited Speaker at the 26th Meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Nov. 13-17, Baltimore, MD.

Aufdenkampe, A.K., J. I. Hedges. 2005. Is the characteristic composition of mineral-associated organic matter the consequence of sorption? Invited Speaker at the 2nd International Conference on Mechanisms of Organic Matter Stabilisation and Destabilisation in Soils, Oct. 9-13, Monterey, CA.

Aufdenkampe, A. K., D. B. Arscott, C. L. Dow and L. J. Standley. 2005. Molecular tracers of soot and sewage contamination in streams supplying NY City drinking water. 2005 New York City Watershed Science and Technical Conference, Sep. 21-22, Fishkill, NY.

Aufdenkampe, A.K., J. I. Hedges. 2005. Is the characteristic composition of mineral-associated organic matter the consequence of sorption? Invited Speaker at the 230th American Chemical Society (ACS) National Meeting, Aug. 28 – Sep. 1, Washington, DC.

Aufdenkampe, A.K., J. I. Hedges. 2005. Characteristic composition of mineral-associated organic matter in soils and freshwater sediments.  Invited Speaker and discussion leader at the Carbon in Fluvial Sediments working group sponsored by National Center for Earth-surface Dynamics (NCED), June 14-16, Seattle, WA.

Aufdenkampe, A.K., E. Mayorga, J. I. Hedges, M. E. McClain, C. A. Llerena, P. D. Quay, A. V. Krusche, J. E. Richey.  2005. From the Andes to the Atlantic: The evolution of organic matter in the Amazon river system.  Talk at AGU-NABS Joint Meeting, May 23-27, New Orleans, LA.

Richey, J. E., A. K Aufdenkampe, S. Alin. 2005. Carbon fluxes in the Amazon and Mekong: Relative importance of outgassing versus fluvial export. Talk at AGU-NABS Joint Meeting, May 23-27, New Orleans, LA.

Aufdenkampe, A. K. 2005. Molecular Tracers of Contamination Sources. To the staff of NY DEC, DOH, DEP and EPA, March 18, DEP Offices at Valhalla, NY.

Aufdenkampe, A.K., E. Mayorga, C. A. Masiello, J. I. Hedges, T. Brown, A. V. Krusche, P. D. Quay, J. E. Richey. 2005. Isotopic Constraints on Organic and Inorganic Carbon Cycling in the Amazon River System. Invited Seminar at the Marine Biological Lab’s Ecosystem Center, March 1, Woods Hole, MA.

Aufdenkampe, A.K., E. Mayorga, J. I. Hedges, C. A. Llerena, P. D. Quay, A. V. Krusche, J. E. Richey. 2005.  The Amazon from the Andes to the Atlantic: The evolution of organic matter in a large river system. Talk at ASLO Aquatic Sciences Meeting, Feb. 21-25, Salt Lake City, UT.

Grants & Awards

Co-Principal Investigator. “Diatom-Bound Nitrogen Isotopes as a Diagenetically Stable Proxy for Southern Ocean Nutrient Utilization and Early Pliocene Climatic Warmth”. American Chemical Society – Petroleum Research Fund. 2009-2011. $39,350.

Co-Lead Principal Investigator. “Spatial and temporal integration of carbon and mineral fluxes: a whole watershed approach to quantifying anthropogenic modification of critical zone carbon sequestration”. National Science Foundation – Critical Zone Observatory Program. 2009-2014. $2,444,480.

Co-Principal Investigator. “Collaborative Research - Model My Watershed®®: Developing a Cyberlearning Application and Curricula to Enhance Interest in STEM Careers”. National Science Foundation – ITEST Program. 2009-2012. $870,112.

Co-Principal Investigator. “Was collapse inevitable on Easter Island (Rapa Nui): reconstructing a civilisation’s failure”. Marsden Fund, New Zealand. 2009-2011. $96,877.

Co-Principal Investigator. “Collaborative Research: Geomorphodynamic Modulation of Biogeochemical Fluxes and Basin Stratigraphy of the Fly River”. National Science Foundation– Margins Program – OCE-0742478. 2008-2011. $81,006.

Co-Principal Investigator. “Acceleration of inorganic nutrient release and mineral-organic matter association by biophysical soil mixing along an earthworm invasion chronosequence”. US Dept. of Agriculture – NRI Soils Processes– award #2008-35107-04478. 2008-2011. $176,314.

Principal Investigator. “Water, Salt, and Nutrient Balances in an Estuarine Salt Marsh (Murderkill River Estuary, Kent County, Delaware)”. Collaboration with William Ullman, of the Univ. of Delaware. Funded by Kent County. 2007-2008. $97,369.

Co-Principal Investigator. “Scientific and Educational Aspects of Water Quality and Stream Health in Eastern Pennsylvania”. NASA. 2007-2008. $278,711.

Co-Principal Investigator. “Organic & isotope geochemistry of transported organic matter in Great River Ecosystems”. Subcontract to through Virginia Commonwealth Univ. to the Environmental Protection Agency’s Environmental Monitoring and Assessment Program (EMAP) – Great River Ecosystems (GRE) Project. 2006-2007. $40,450 subcontract.

Co-Principal Investigator.“Collaborative Research: Seston Contributions to metabolism Across Longitudinal Ecosystems (SCALE)--Dynamics of Organic Particles in River Networks”. National Science Foundation – Ecosystem Studies Program – DEB-0543526. 2006-2009. $464,559

Co-Principal Investigator. “Measuring watershed health: training conservation planners how to use biophysical tools for monitoring streams in temperate and neo-tropical ecosystems”. Moore Foundation, 2006. $400,000.

Co-Principal Investigator. “LTREB: Dynamics of Stream Ecosystem Responses Across Gradients of Reforestation and Changing Climate in a Tropical Dry Forest”. National Science Foundation - Ecosystem Studies Program - DEB-0516516. 2005-2010. $300,000.

Co-Principal Investigator. “Collaborative Research: The Application of Scaling Rules to Energy Flow in Stream Ecosystems”. National Science Foundation - Ecosystem Studies Program - DEB-0516449. 2005-2009. $617,599.

Co-Principal Investigator. “Collaborative Proposal: Hydrologic Regulation of Dissolved Organic Matter Biogeochemistry from Forests through River Networks”. National Science Foundation ­ EAR-0450331 Hydrological Sciences Water Cycle Research Program Program. 2005-2009. $645,215.

Principal Investigator. “Collaborative Research: Episodic, ENSO-Orchestrated Carbon Sequestration in Amazonian River Basins by Erosion-Sedimentation Processes”. National Science Foundation ­ EAR-0404169. 2004 ­ 2007. $217,175.

Co-Principal Investigator. “Organic geochemistry of particles in Great River Ecosystems”. Subcontract to through Univ. of Louisville to the Environmental Protection Agency’s Environmental Monitoring and Assessment Program (EMAP) ­ Great River Ecosystems (GRE) Project. 2004-2006. $65,400 subcontract.

Co-Principal Investigator. “LTREB: Stream ecosystem structure and function within a maturing deciduous forest”. National Science Foundation ­ DEB-0424681. 2004 ­ 2009. $300,000.

Co-Principal Investigator. “Water quality monitoring in the source water areas for New York City: an integrative watershed approach”. NY State DEC and U.S. EPA. 2003-2006. $4,000,000.

Co-Principal Investigator. “Carbon dioxide evasion from fluvial environments of Amazonia: A major sink for terrestrially fixed carbon and a tracer of ecosystem processes”. Subcontract to National Science Foundation ­ DEB-0213585. 2002-2005. $67,289 subcontract.

Principal Investigator. “River metabolism within the Amazon Basin: Constraints on the ROMBUS model”. National Science Foundation ­ INT-0107270. 2002 ­ 2004. $57,000.

Co-Principal Investigator. “Radiocarbon constraints on organic matter turnover in the Amazon River Basin: Model conceptualization and validation”. Mini-grant from Lawrence Livermore National Laboratory - Center for Accelerator Mass Spectrometry. 2000 ­ 2001. $3,654 + 153 radiocarbon analyses.

Synergistic Activities

Voting Member

Toxic Advisory Committee (TAC) of the Delaware River Basin Commission (DRBC), 2003 to present.

Advisor

  • Chunmei Chen, Ph.D. student at the University of Delaware, Department of Plant and Soil Sciences. Co-advisor with Kyungsoo Yoo. 2007-present.
  • Emily S. Maung, Ph.D. student at the University of Delaware, Marine Biosciences Program. Co-advisor with Doug Miller. 2007-present.
  • Linda Carter, Post-Doctoral Associate, Stroud Water Research Center, 2005-2006.
  • Michelle C. Cogo, M.S. student at Univ. de São Paulo, Brazil. Co-advisor, 2002-2005.
  • Angela Knapp, NASA OUR Earth Undergraduate Fellow at the University of Washington, 1998.

Reviewer

Analytical Chemistry; Biogeochemistry; Global Biogeochemical Cycles; Geochimica et Cosmochimica Acta; Estuarine, Coastal and Shelf Science; European Journal of Soil Science; Hydrological Processes; Journal of Environmental Quality; Journal of the North American Benthological Society; Limnology and Oceanography; National Science Foundation proposals; Organic Geochemistry; Water Research.

Guest Lecturer and Field Instructor

Taught lectures and week-long mini-units in:

  • Introduction to Freshwater Ecology with T. Bott, University of Pennsylvania, 2004-2006.
  • Introduction to Field Ecology with J. Thorne, University of Pennsylvania, 2003.
  • Introductory Oceanography for C. Sarason, Seattle Central Community College, 2001.
  • Ocean Inquiry Project for C. Sarason, Seattle, 2001.
  • River Basin Biogeochemistry for J. E. Richey and A. H. Devol, Univ. of Washington, 2000.
  • Biological Oceanography for J. Newton, Northeastern University (at Friday Harbor Labs), 1999.
  • Introductory Oceanography for R. Carpenter, University of Washington, 1997.

Sustainable Agriculture Educator

U.S. Peace Corps, 1992-1994. Developed and implemented soil conservation programs and trained local extension agents. Central African Republic.

Languages

In order of proficiency: English, French, Portuguese, Sango (Central African Republic), Spanish.