McDowell Lab Alumni

Jacqueline Ann Aitkenhead-Peterson

Ph.D. University of New Hampshire, 2000
Research Focus at UNH:
My dissertation sought to identify the sources and fates of dissolved organic carbon and nitrogen. Fieldwork at UNH was primarily at Harvard Forest LTER.
Current Position and Contact Information:
Selected Publications:
Basatnia N., Hossein SA., Rodrigo-Comino J., Khaledian Y., Brevik EC., Aitkenhead-Peterson JA., Natesan U. (2018). Assessment of temporal and spatial water quality in international  Gomishan Lagoon, Iran, using multivariate analysis. Environ. Monit. Assess. 190: 314.
Berube M., Jewell K., Knappett P S., Shuar P., Datta S., Hossain A., Lipsi M., Hossain S., Hossain A., Dimova N., Aitkenhead-Peterson J A., and Ahmed A M. (2018).The fate of Arsenic in groundwater discharged to the Meghna River, Bangladesh. (in press). Environ Chem.   

Nagaraju A., Thejaswi, A., Aitkenhead-Peterson, JA. (2017) Fluoride and heavy metal accumulation by vegetation in the fluoride affected area of Talupula, Anantapur District,    Andhra Pradesh. Journal of the Geological Society of India, 89(1): 1-11.

Khaledian Y., Kiani F, Ebrahimi, S., Brevik EC., and Aitkenhead-Peterson JA (2017) Assessment and monitoring of soil degradation during land use change using multivariate analysis. Land Degradation and Development. DOI: 10.1002/ldr.2541.

Fontanier C., Wherley B., White R., Aitkenhead-Peterson J., Chalmers D. (2017). Historical ETo – based Irrigation Scheduling for St. Augustinegrass Lawns in the South-Central United States. Irrigation Science 35(4): 347-356. DOI: 10.1007/s00271-017-0544-x.

Fontanier C., Aitkenhead-Peterson JA., Wherley B., White R., Thomas J. (2017), Deficit irrigation effects on NO3-N losses in runoff from St. Augustinegrass. J. Environmental Qual. 46(4): 793-801.

Fancher JP., Aitkenhead-Peterson JA., Farris T., Mix K., Schwab AP., Wescott D., Hamilton M. (2017) Soil chemistry of cadaver decomposition  islands in a clayey soil. Forensic Science International. , 279, 130-139.

Gregory LF., Karthikeyan R., Aitkenhead-Peterson JA., Gentry TJ., Wagner KL., Harmel DR. (2018) Nutrient Loading Impacts on Culturable E. coli and other Heterotrophic Bacteria Fate in  Simulated Stream Mesocosms. Water Research 126: 442-449.

Alexander MB., Hodges TK., Wescott DJ., Aitkenhead-Peterson JA. (2016). The Effects of Soil  Texture on the Ability of Human Remains Detection Dogs to Detect Buried Human Remains. J. Forensic Science, 61(3): 649-655.

Aitkenhead-Peterson JA., Steele MK. (2016) DOC and DON exports upstream and downstream of  the Dallas/Fort Worth Metropolis, Texas, USA.  Invited Paper, Marine and Freshwater   Research 67(9): 1326-1337.


Allison Appling

Post-doctoral research University of New Hampshire
Ph.D. Duke University, 2012
B.S. Stanford University, 2004
Research Focus at UNH:
1) How do species-specific traits such as biomass stoichiometry and growth rate shape the magnitude and temporal patterns of ecosystem-scale nutrient uptake? (This project is currently taking place with Jim Heffernan at Duke University, but might influence work at UNH) 
2) How do land use, precipitation patterns, and in-stream processing affect solute concentrations in the Lamprey River?
Current Position & Contact Information:


Adam Baumann

M.S. Environmental Science and Policy, Plymouth State University
B.S. Chemistry, State University of New York College of Environmental Science and Forestry
Research Focus at UNH:
Acid Rain: Evaluating long-term trends in biologically relevant chemistry in relation to the emissions regulations of the 1990 Clean Air Act Amendments. Using remote and high elevation lakes to enhance our understanding of the effect atmospheric pollutants have on aquatic ecosystems.
Remote Sensing: Use of in-situ instrumentation to increase temporal and spatial resolution of nutrient and pollutant flux in surface waters. Influence of development and land-use on water quality.
Technical Support: Provide general technical support for instrumentation upkeep, maintenance and repair. Development of new methods. Instructional support for students on research and analytical methods.
Current Position & Contact Information:
Research Lab Manager
Flathead Lake Biological Station


Richard Brereton

Ph.D. University of New Hampshire, 2018
B.A. Colorado College, 2008
Research Focus at UNH:
Watershed nitrogen dynamics in the Luquillo Experimental Forest, Puerto Rico
Current Position & Contact Information:

John Ciaburri

B.Sc. Environmental Sciences, University of New Hampshire


Research Focus at UNH:
Lamprey River long term monitoring
DES Tidal Tributary
NHGW well monitoring
College Brook monthly sampling
NH Streams DDON 
Argon Additions 

Ashley Coble

Post-doctoral research University of New Hampshire (2015-2017)
Ph.D. Michigan Technological University, 2015
M.S. Northern Arizona University, 2010
B.A. Mount Holyoke College, 2005
Research Focus at UNH:
1) How may concentration-discharge relationships and long-term trends of solute concentrations be altered by hydrological extremes in a suburbanizing watershed?
2) How does DOM composition vary over space and time in a river network?
3) Does the pulse of snowmelt (NO3 and FDOM) vary across a N gradient using high frequency sensors?
Current Position & Contact Information:
Research interests: Research to understand the environmental effects of forestry activities on watersheds (including water quality and quantity).
Forest Watershed Scientist
National Council for Air and Stream Improvement, Inc. (NCASI)
227 NW Third Street
Corvallis, OR 97330
(541)752-8801 ext 303

Selected publications:

Coble AA, Marcarelli AM, Kane ES, Huckins CJ.  2016. Uptake of ammonium and soluble reactive   phosphorus in forested streams: influence of dissolved organic matter   composition.  Biogeochemistry, 131, 355-372,  doi: 10.1007/s10533-016-0284-7

Wymore, A, Coble, AA, Rodriguez-Cordona, B, McDowell, WH.  2016.  Nitrate uptake across biomes   and the influence of elemental stoichiometry: A new look at LINX II.  Global Biogeochemical   Cycles, 30, 1183-1191, doi: 10.1002/2016GB005468

Coble AA, Marcarelli AM, Kane ES, Stottlemyer R, Toczydlowski, D.  2016.  Seasonality, export, and  biodegradability of dissolved organic carbon in Lake Superior tributaries, Journal of Geophysical Research Biogeosciences, 121, doi:10.1002/2015JG003218.

Coble AA, Marcarelli AM, Kane ES.  2015.  Ammonium and glucose amendments stimulate   dissolved organic matter mineralization in a Lake Superior tributary.  Journal of Great Lakes   Research, 41(3), doi:10.1016/j.jglr.2015.05.015


Michelle Galvin Craddock

M.S. Water Resources, University of New Hampshire
B.A. Environmental Science, Boston University
Current Position & Contact Information:
Flow Restoration Specialist
Massachusetts Department of Fish and Game, Division of Ecological Restoration
Boston, MA


Laura Diemer

M.S. Water Resources- University of New Hampshire
B.S. Environmental Science, University of Maine, Orono

Research Focus at UNH:

In-stream carbon, nitrogen, and phosphorus dynamics on the Central Siberian Plateau; quantifying bioavailable organic matter fractions following permafrost degradation.

Current Position & Contact Information:
Project Manager
FB Environmental Associates
170 West Rd, Suite 6
Portsmouth, NH 03801
Selected publications:
Diemer, L. A, W. H. McDowell, A. S. Wymore, and A. S. Prokushkin. 2015. Nutrient uptake along a fire gradient in boreal streams of Central Siberia. Freshwater Science 34(4): 1443-1456.


Kate Dunlap

M.S. Water Resources- University of New Hampshire
B.A. Environmental Studies, B.A. Spanish- Pacific Lutheran University
Research Focus at UNH:
I measured seasonal patterns in nitrate assimilation and denitrification in Burley-Demeritt Creek, on the UNH Organic Dairy Farm.
Current Position & Contact Information:
Source Water Quality Program Coordinator
City of Boulder, Colorado

To protect and preserve the city’s source water quality, I collaborate across sectors, analyze environmental data, and communicate results to inform special projects and policies, and educate staff and customers about our drinking water.

Dunlap, C.R., Sklenar, K.S., Blake, L.J. 2015. A costly endeavor: addressing algae problems in a water supply. Journal of the American Water Works Association.


Shelby Flint

Ph.D. Univ. of Minnesota (Conservation Biology, anticipated 2013)
M.S. Univ. of New Hampshire (Natural Resources: Water Resources, 2007)
B.A. Univ. of Arizona (Political Science, 1993, concurrently earned)
B.A. Univ. of Arizona (Women’s Studies, 1993)
A.A. Simon’s Rock College (Liberal Studies, 1987)
Current Position & Contact Information:
University of Minnesota
100 Ecology
1987 Upper Buford Circle
St. Paul, MN 55108
Selected publications:
Flint, S., Markle, T., Thompson, S., and Wallace, E. 2012. Bisphenol A exposure, effects, and policy: A wildlife perspective. Journal of Environmental Management.  doi:10.1016/j.jenvman.2012.03.021
Flint, S., Heidel, T., Loss, S., Osborne, J., Prescott, K., Smith., D. 2012. CBD Biosafety Technical Series 02: Summary and Comparative Analysis of Nine National Approaches to Ecological Risk Assessment of Living Modified Organisms in the Context of the Cartagena Protocol on Biosafety, Annex III.  178 pp.,, Montreal: SC BD. 
Flint, S., and McDowell, W. H., 2015. Effects of headwater wetlands on dissolved nitrogen and dissolved organic carbon concentrations in a suburban New Hampshire watershed. Freshwater Science 34, no. 2: 456-471.

Flint, S., Jordan, N., and Shaw, R., 2018. Plant community response to switchgrass (Panicum virgatum) population source in establishing prairies. Journal of Ecological Society of America.

Current Position & Contact Information:

Ania (Kobylinski) Javorski

M.Sc. NRES Candidate University of Northern British Columbia, Canada
B.Sc. McMaster University, Hamilton, Ontario Canada
Research Focus at UNH:
Lamprey River long term water quality monitoring 
DES Tidal Tributaries 
NHGS Well Monitoring 
College Brook (Durham) monthly monitoring


Lauren Koenig

Ph.D. University of New Hampshire, 2017
Current Position & Contact Information:
Postdoc, Helton Lab
University of Connecticut 
Selected publications:
Koenig, L.E., M.D. Shattuck, L.E. Snyder, J.D. Potter, and W.H. McDowell. 2017. Deconstructing   the effects of flow on DOC, nitrate, and major ion interactions using a high-frequency aquatic  sensor network. Water Resources Research 53(12): 10655-10673.             DOI: 10.1002/2017WR020739
Koenig, L.E., C. Song, W.M. Wollheim, J. Rüegg, and W.H. McDowell. 2017. Nitrification increases  nitrogen export from a tropical river network. Freshwater Science 36(4): 698-712. DOI: 10.1086/694906

Koenig, L.E., A.J. Baumann, and W.H. McDowell. 2014. Improving automated phosphorus measurements in freshwater: an analytical approach to eliminating silica interference.  Limnology and Oceanography-Methods 12: 223-231. DOI: 10.4319/lom.2014.12.223

Jordan Macy

M.Sc. University of New Hampshire, 2005
B.Sc. 2000
Research Focus at UNH:
Effects of Nitrogen Saturation Experiments in Lowland Rainforest and Montane Cloud Forest of El Yunque Rainforest, Puerto Rico. 
Current Position & Contact Information:
Currently serving as the Managing Director for Pure Home Water, a non-profit company dedicated to providing affordable safe home water filtration and storage solutions to rural households in the Northern Region of Ghana. Pure Home Water manufactures clay filters which can remove up to 99.9% of bacteria and protozoa water borne diseases from available public water supplies, typically including watering holes and dugouts, but also municipally piped drinking water. 


Jeff Merriam

M.Sc. University of New Hampshire, 2001
B.Sc. 1993
Research Focus at UNH:
My thesis investigated Nitrogen transformation, retention and export in a Puerto Rican Stream using a 15N tracer. 
Current Position & Contact Information:
Selected publications:
Bernot M.J., D. J. Sobota, R.O. Hall Jr., P.J. Mulholland, W.K. Dodds, J.R. Webster, J. L. Tank, L.R.   Ashkenas,  L.W. Cooper, C.N. Dahm, S.V. Gregory, N. B. Grimm, S. K. Hamilton, S. L.  Johnson, W.H. McDowell, J. L. Meyer, B. Peterson, G. C. Poole, H. M. Valett, C. Arango, J.  J. Beaulieu, A. J. Burgin, C. Crenshaw, A. M. Helton, L. Johnson, J. Merriam, B.R.  Niederlehner, J.M. O’Brien, J. D. Potter, R. W. Sheibley, S.M. Thomas, K. Wilson,  2010. Inter-regional comparison of land-use effects on stream metabolism. Freshwater Biology, 55, 1874–1890.         

Potter, J.D., W.H. McDowell, J.L. Merriam, B.J. Peterson, and S.M. Thomas. 2010. Denitrification and total nitrate uptake in streams of a tropical landscape.  Ecological Applications,    20(8):2104-2115.

McDowell, W.H., A. Magill, J.A. Aitkenhead-Peterson, John D. Aber, Jeffrey Merriam, Sujay Kaushal.  2004. Effects of chronic nitrogen amendment on dissolved organic matter and inorganic nitrogen in soil solution. Forest Ecology and Management 196:29-42.
Webster, J.R., P.J. Mulholland, J.L. Tank, B.J. Peterson, W.R. Dodds, H.M. Valett, W.B.  Bowden, C.N. Dahm, S. Findlay, S.V. Gregory, N.B. Grimm, S.K. Hamilton, S.L. Johnson, E. Marti, W.H. McDowell, J.L. Merriam, D.D. Morrall, J.L. Meyer, S.A. Thomas, and W.M. Wollheim.  2003.  Factors affecting ammonium uptake in streams – an inter-biome  perspective.  Freshwater Biology 48:1329-1352.

Mulholland, P.J., J. L. Tank, J. R. Webster, W. B. Bowden, W. K. Dodds, S. V. Gregory, N. B.  Grimm, S. K. Hamilton, S. L. Johnson, E. Martí, W. H. McDowell, J. Merriam, J. L. Meyer, B.   J. Peterson, H. M. Valett, and W. M. Wollheim. 2002.  Can uptake length in streams be         determined by nutrient addition experiments? Results from an inter-biome comparison  study.  J. North American Benthological Society 21: 544-560.


Anna Meyer

M.S. Water Resources, University of New Hampshire 
B.A. University of Vermont
Research Focus at UNH:
Ammonium cycling in Burley Demerritt Creek, a small agriculturally influenced stream near the University. 
Current Position & Contact Information:


Nat Morse

Ph.D. Natural Resources – University of New Hampshire
M.S. Natural Resources – University of New Hampshire
B.S. Environmental Sciences – University of Vermont
Research Focus at UNH:
Plum Island Ecosystems LTER --
Current Position & Contact Information:
Selected publications:
Morse, N., W. B. Bowden, A. Hackman, C. Pruden, E. Steiner, E. Berger.  2007.  Using sound pressure to estimate reaeration in streams.  Journal of the North American Benthological  Society.  26: 28-37.
Morse, N.B. 2010. Impacts of suburbanization on food web stoichiometry of detritus-based streams.  M.S. dissertation, University of New Hampshire.
Morse, N.B., W.M. Wollheim, J.P. Benstead, & McDowell, W.H.. Impacts of suburbanization on food   web stoichiometry in detritus-based streams of New England. In review. 


Lucy Parham

M.Sc. University of New Hampshire, 2012
B.Sc. Sewanee University of the South
Research Focus at UNH:
1) Spatial and temporal variation of dissolved organic matter in the Lamprey River.
2) Carbon and nitrogen cycling in streams of the Central Siberian Plateau.
Current Position & Contact Information:
Environmental Scientist
Utah Division of Water Quality
195 N 1950 W
Salt Lake City, Utah 84116 

Selected publications:
Parham, L. P, Prokushkin, A.S, Pokrovsky, O.S, Titov, S.V, Grekova, E, Shirokova, L.S, and W. H. McDowell. 2013. Permafrost and fire and regulators of stream chemistry in basins of the Central Siberian Plateau. Biogeochemistry 116(1-3): 55-68.

Brian Pellerin

Ph.D. University of New Hampshire
M.S. University of Maine
B.S. University of New Hampshire
Current Position & Contact Information:


Dereck Robinson

M.Sc., Water Resources Management, University of New Hampshire, 2002
B.S., Water Resources Management, University of New Hampshire, 1999


Research Focus at UNH:
Concentrated on the impacts of carbon and nitrogen loading of organic soils within forested ecosystems.  Additionally, I assisted with the development and installation of Zero Tension Lysimeters in multiple forest stands across the northeast as well as in El Yunque, Puerto Rico, where water was collected and analyzed for dissolved organic carbon and nitrogen. 


Current Position & Contact Information:
NASA, Program Analyst 
NASA Goddard Space Flight Center, Greenbelt, MD 20771. 
Cell: 603-591-5968 Office: 301-286-6220. 


Selected publications:
Robinson, D.P. 2002. Glomalin: a potential sink for nitrogen and possible contributor to dissolved organic carbon and nitrogen within the organic soils of the Harvard Forest, 10/01/2000-09/30/2003. M.S. Thesis, University of New Hampshire, 62pp.

Nick Shonka

M.S., Soil and Water Resource Management, University of New Hampshire, Durham, New Hampshire, 2014
B.A., Environmental Studies, University of Colorado, Boulder, Colorado, 2005
Research Focus at UNH:
Sediment loading and transport associated with land-use change in the Lamprey River Watershed.
Current Position & Contact Information:
Selected publications:
Shonka, N.K. 2014. Water quality sensors provide insight into the suspended solids dynamics of high flow storm events in the Lamprey River. Master of Science Dissertation, Department of   Natural Resources & the Environment, College of Life Sciences and Agriculture, University of  New Hampshire, Durham, NH. Publication No. 1526056.

Morse, N.B., P.A. Pellissier, E.N. Cianciola, R.L. Brereton, M.M. Sullivan, N.K. Shonka, T.B. Wheeler, and W.H. McDowell. 2014. Novel ecosystems in the Anthropocene: A revision of  the novel ecosystem concept for pragmatic applications. Ecology and Society 19(2):12.


Elena Traister

Ph.D. University of New Hampshire, 2010
Research Focus at UNH:
My research focused on stream disturbance ecology and I had field sites in New Hampshire (on the Suncook River), in western Massachusetts, and in the Czech Republic.
Current Position & Contact Information:
Selected publications:
Kram, P., Oulehle, F., Stedra, V., Hruska, J., Shanley, J.B., Minocha, R., and E. Traister. 2010. Geoecology of a forest watershed underlain by serpentine in Central Europe. Northeastern  Naturalist 16:309-328.

Kram P., Traister E., Kolarikova K., Oulehle F., Skorepa J., Fottova D. (2008) Potocni makrozoobentos deviti vybranych povodi site GEOMON (In Czech , English abstract: Stream  benthic macroinvertebrates of nine selected catchments of the GEOMON network). Zpravy o        geologickych vyzkumech za rok 2007 (Geoscience Research Reports for 2007), 162-168, Ceska geologicka sluzba (Czech Geological Survey), Praha, in press.

Traister, E.M. and S. Anisfeld. 2006. Variability of Indicator Bacteria at Different Time Scales in the Upper Hoosic River Watershed. Environmental Science and Technology 40: 4990-4995.

Traister, E.M., McDowell, W.H., Kram, P, Fottova, D., and K. Kolarikova. Persistent effects of acidification on stream ecosystem structure and function. 2013. Freshwater Science 32: 586-596.