Peter M. Groffman, Ph.D.

  • Professor, Environmental Sciences Initiative
  • Professor of Earth and Environmental Sciences, Brooklyn College

Peter M. Groffman, Ph.D. joined the Environmental Sciences Initiative in November 2015. He completed his B.A. at the University of Virginia and his Ph.D. at the University of Georgia. Groffman previously held the position of Senior Scientist at the Cary Institute of Ecosystem Studies.

Groffman’s research focuses on terrestrial biogeochemistry with a focus on nitrogen dynamics, especially gases. Projects have ranged across multiple scales from microbial/molecular scale analyses to field/ecosystem scale measurement of fluxes using geochemical and isotope approaches, to landscape and regional scale work using remote sensing, geographic information systems and simulation models. Much of his research is focused at two National Science Foundation funded Long Term Ecological Research (LTER) sites; Hubbard Brook, New Hampshire and Baltimore, MD.

During his career, he has authored over 300 publications, with more than 85 as primary author. Groffman was a Convening Lead Author for the 2013 U.S. National Climate Assessment Chapter on Ecosystems, Biodiversity and Ecosystem Services and a lead author for the Second (Wetlands) and Third (North America) Assessment Reports of the Intergovernmental Program on Climate Change (IPCC).   Groffman is also a professor in Brooklyn College’s Department of Earth and Environmental Sciences.

Google Scholar Citations:


E.S. Castiblanco, P. Groffman, J. Duncan, L.E. Band, E. Doheny, G.T. Fisher, E. Rosi, and A.K. Suchy. Long-term trends in nitrate and chloride in streams in an exurban watershed. Urban Ecosystems, 2023.

M. Almaraz, P.M. Groffman, W.L. Silver, S.J. Hall, L. Yang, C. O'Connell, and S. Porder. Dinitrogen emissions dominate nitrogen gas emissions from soils with low oxygen availability in a moist tropical forest. Journal of Geophysical Research-Biogeosciences, 2023, 128, e2022JG007210.

B.S. Halpern, C. Boettiger, M.C. Dietze, J.A. Gephart, P. Gonzalez, N.B. Grimm, P.M. Groffman, J. Gurevitch, S.E. Hobbie, K.J. Komatsu, K.J. Kroeker, H.J. Lahr, D.M. Lodge, C.J. Lortie, J.S.S. Lowndes, F. Micheli, H.P. Possingham, M.H. Ruckelshaus, C. Scarborough, C.L. Wood, G.C. Wu and 96 others. Priorities for synthesis research in ecology and environmental science. Ecosphere2023, 14:e4342.

A.L. Gill, R.M. Grinder, C.R. See, F.S. Chapin, L.C. DeLancey, M.C. Fisk, P.M. Groffman, T.K. Harms, S.E. Hobbie, J.D. Knoepp, J.D. Knops, M.C. Mack, P.B. Reich, and A.D. Keiser. Soil carbon availability decouples net nitrogen mineralization and net nitrification across United States Long Term Ecological Research sites. Biogeochemistry, 2023.

A.K. Suchy, M.L. Fork, L. Lin, D. Locke, P.M. Groffman, J.M. Grove, S.L. LaDeau, and E.J. Rosi. More green, fewer problems: Landcover relates to perception of environmental problems. Frontiers in Ecology and the Environment, 2023, 21(3), 124-130.

C. Welty, J. Moore, D.J. Bain, M. Talebpour, J.T. Kemper, P.M. Groffman, and J.M. Duncan. Spatial heterogeneity and temporal stability of baseflow stream chemistry in an urban watershed. Water Resources Research, 2023, 59:e2021WR031804.

S. Inamdar, E.K. Peck, M.Peipoch, A.J. Gold, M. Sherman, J. Hripto, P.M. Groffman, T.L.E. Trammell, D. Merritts, K. Addy, E. Lewis, R.C. Walter, and J. Kan. 2022. Saturated, suffocated, and salty: Human legacies produce hotspots of nitrogen in riparian zones. Journal of Geophysical Research-Biogeosciences, 2022,  127:e2022JG007138.

C.D. Ryan, P.M. Groffman, J.M. Grove, S.J. Hall, J.B. Heffernan, S.E. Hobbie, D.H. Locke, J.L. Morse, C. Neill, K.C. Nelson, J. O'Neil-Dunne, R. Roy Chowdhury, M.K. Steele, and T.L.E. Trammell. Ecological homogenization of soil properties in the American residential macrosystem. Ecosphere2022, 13, 9, e4208.

J.L. Campbell, E. Boose, C.T. Driscoll, H.A. Dugan, P.M. Groffman, C.R. Jackson, J.B. Jones, J.A. Jones, G.P. Juday, N.R. Lottig, B.E. Penaluna, R.W. Ruess, K.N. Suding, J.R. Thompson, and J.K. Zimmerman. Forest and freshwater ecosystem responses to climate change and variability at US LTER sites. BioScience, 2022, 72, 851-870.

N.A. Alcantar, S. Banta, A.D. Cak, X. Chen, C. DelRe, L.F. Deravi, J.S. Dordick, B.M. Giebel, D. Greenfield, P.M. Groffman, M. Holford, G. John, N.S. Joshi, N.A. Kotov, J. K. Montclare, B.S. Moore, J.H. Ortony, A.B. Reinmann, J. Son, R.E. Stark, R.V. Ulijn, C.J. Vörösmarty, C.J. Wilson, Bioinspired Green Science and Technology Symposium in NYC, Matter, 2022, 5, 7, 1980-1984.

A. Paltseva, Z. Cheng, M. McBridge, M. Deeb, S.P. Egendorf, and P.M. Groffman. Legacy lead in urban garden soils: Communicating risk and limiting exposure. Frontiers in Ecology and Evolution, 2022,  DOI: 10.3389/fevo.2022.873542.

T. McPhearson, E.M. Cook, M. Berbés-Blázquez, C. Cheng, N.B. Grimm, E. Andersson, O. Barbosa, D.G. Chandler, H. Chang, M.V. Chester, D.L. Childers, S.R. Elser, N. Frantzeskaki, Z. Grabowski, P. Groffman, R.L. Hale, D.M. Iwaniec, N. Kabisch, C. Kennedy, S.A. Markolf, A.M. Matsler, L.E. McPhillips, T.R. Miller, T.A. Muñoz-Erickson, E. Rosi, and T.G. Troxler. A social-ecological-technological systems framework for urban ecosystem services. One Earth2022, 5, 505-518.

R. Zhang, D. Newburn, A. Rosenberg, L. Lin, P.M. Groffman, J. Duncan, and L.E. Band. Spatial asynchrony in environmental and economic benefits of stream restoration. Environmental Research Letters, 2022, 17, 5, 054004.

R.E. Mason, J.M. Craine, N.K. Lany, M. Jonard, S.V. Ollinger, P.M. Groffman, R.W. Fulweiler, J. Angerer, Q.D. Read, P.B. Reich, P.H. Templer, and A.J. Elmore. Evidence, causes, and consequences of declining nitrogen availability in terrestrial ecosystems. Science2022, 376, 6590, eabh3767.

K. Larson, S.B. Lerman, K. Nelson, D.L. Narango, M.M. Wheeler, P.M. Groffman, S.J. Hall and J.M. Grove. Examining the potential to expand wildlife-supporting residential yards and gardens. Landscape and Urban Planning2022, 222, 104396.

N.F. Sonti, P.M. Groffman, D.J. Nowak, J.G. Hennings, M.L. Avolio, and E.J. Rosi. Urban net primary production: Concepts, field methods, and Baltimore, MD case study. Ecological Applications, 2022, 32, 4, e2562.

G.A. Mejia, P.M. Groffman, A.E. Downey, E.M. Cook, S. Sritrairat, R. Karty, M.I. Palmer, and T. McPhearson. Nitrogen Cycling Drives Success in Urban Afforestation in New York City. Ecological Applications, 2022, 32, e2535.

C. Nevison, C. Goodale, P. Hess, W.R. Wieder, J. Vira, and P.M. Groffman. Nitrification and denitrification in the Community Land Model compared to observations at Hubbard Brook Forest. Ecological Applications2022, 32, 4, e2530.

Z.J. Grabowski, T. McPhearson, A.M. Matsler, P. Groffman, and S.T. Pickett. What is green infrastructure? A study of definitions in US city planning. Frontiers in Ecology and the Environment, 2022, 20, 152-160.

X. Ni, S. Liao, F. Wu, and P.M. Groffman. Microbial biomass in forest soils under altered moisture conditions: A review. Soil Science Society of America Journal, 2022, 86, 2, 358-368.

A. Maharjan, P.M. Groffman, C.J. Vörösmarty, M. Tzortziou, X. Tang, and P.A. Green. Sources of terrestrial nitrogen and phosphorus mobilization in South and South East Asian coastal ecosystems. Watershed Ecology and the Environment, 2022, 4, 12-31.

S. Lerman, D. Narango, M. Avolio, A. Bratt, J. Engebretson, P.M. Groffman, S.J. Hall, J. Heffernan, S.E. Hobbie, K. Larson, D. Locke, C. Neill, K. Nelson, Cubino, J.P. and T.L. Trammell. Residential Yard Management and Landscape Cover Affect Urban Bird Community Diversity across the Continental US. Ecological Applications, 2021, e02455.

E. Stephan, P. Groffman, P. Vidon, J.C. Stella, and T. Endreny. Interacting Drivers and their Tradeoffs for Predicting Denitrification Potential across a Strong Urban to Rural Gradient within Heterogeneous Landscapes. Journal of Environmental Management, 2021, 294, 113021.

T.K. Harms, P. Groffman, L. Aluwihare, C. Craft, W.R. Wieder, S.E. Hobbie, S.G. Baer, J.M. Blair, S. Frey, C.K. Remucal, J.A. Rudgers, S.L. Collins, and LTER OM Working Group.  Patterns and Trends of Organic Matter Processing and Transport: Insights from the US Long-Term Ecological Research Network. Global Change Ecology, 2021, 2, 100025.

A.E. Downey,  P.M. Groffman, G.A. Mejía, E.M. Cook, S. Sritrairat, R. Karty, M.I. Palmer, and T. McPhearson. Soil Carbon Sequestration in Urban Afforestation Sites in New York City. Urban Forestry & Urban Greening, 2021, 65, 127342.

M.P. Nelson and P.M. Groffman. Climate Change is Already Disrupting US Forests and Coasts – Here’s What We’re Seeing at 5 Long-Term Research Sites. The Conversation, 2021.

E. Lewis, S. Inamdar, A.J. Gold, K. Addy, T.L.E. Trammell, D. Merritts, M. Peipoch, P.M. Groffman, J. Hripto, M. Sherman, J. Kan, R. Walter, and E. Peck. Draining the Landscape: How Do Nitrogen Concentrations in Riparian Groundwater and Stream Water Change Following Milldam Removal? Journal of Geophysical Research: Biogeosciences, 2021, 126, e2021JG006444.

S.P. Egendorf, P. Groffman, Z. Cheng, M. Menser, J. Mun, and H. Mielke. Applying a Novel Systems Approach to Address Systemic Environmental Injustices. Elementa: Science of the Anthropocene, 2021, 9, 00174.

J.N. Weitzman, P.M. Groffman, P.R. Adler, C.J. Dell, F.E. Johnson, R.N. Lerch, and T.C. Strickland. Drivers of Hot Spots and Hot Moments of Denitrification in Agricultural Systems. Journal of Geophysical Research Biogeosciences, 2021, 126, e2020JG006234.

K. Wijsman, N. Auyeung, P. Brashear, B. Branco, K. Graziano, P.M. Groffman, H. Cheng, and D. Corbett. Operationalizing Resilience: Co-Creating a Framework to Monitor Hard, Natural, and Nature-Based Shoreline Features in New York State. Ecology and Society, 2021, 26, 3, 10.

L. Lin, A.J. Reisinger, E.J. Rosi, P.M. Groffman, and L.E. Band. Evaluating Instream Restoration Effectiveness in Reducing Nitrogen Export from an Urban Catchment with a Data-Model Approach. JAWRA Journal of the American Water Resources Association, 2021, 57, 3, 449-473.

T.S. Bianchi, M. Anand, C.T. Bauch, D.E. Canfield, L. De Meester, K. Fennel, P.M. Groffman, M.L. Pace, M. Saito, and M.J. Simpson. Ideas and Perspectives: Biogeochemistry – Some Key Foci for the Future. Biogeosciences, 2021, 18, 3005-3013.

D.M. Iwaniec,  M. Gooseff, K.N. Suding, D. Samuel Johnson, D.C. Reed, D.P.C. Peters, B. Adams, J.E. Barrett, B.T. Bestelmeyer, M.C.N. Castorani, E.M. Cook, M.J. Davidson, P.M. Groffman, N.P. Hanan, L.F. Huenneke, P.T.J. Johnson, D.M. McKnight, R.J. Miller, G.S. Okin, D.L. Preston, A. Rassweiler, C. Ray, O.E. Sala, R.L. Schooley, T. Seastedt, M.J. Spasojevic, and E.R. Vivoni. Connectivity: Insights from the U.S. Long Term Ecological Research Network. Ecosphere, 2021, 12, ecs2.3432.

J. Cowles, L. Templeton, J.J. Battles, P.J. Edmunds, R.C. Carpenter, S.R. Carpenter, M. Paul Nelson, N.L. Cleavitt, T.J. Fahey, P.M. Groffman, J.H. Sullivan, M.C. Neel, G.J.A. Hansen, S. Hobbie, S.J. Holbrook, C.E. Kazanski, E.W. Seabloom, R.J. Schmitt, E.H. Stanley, A.J. Tepley, N.S. Doorn, and J.M. Vander Zanden. Resilience: Insights from the U.S. Long Term Ecological Research Network. Ecosphere, 2021, 12, ecs2.3434.

E.B. Rastetter, M.D. Ohman, K.J. Elliott, J.S. Rehage, V.H. Rivera‐Monroy, R.E. Boucek, E. Castañeda-Moya, T.M. Danielson, L. Gough, P.M. Groffman, C.R. Jackson, C.F. Miniat, and G.R. Shaver. Time Lags: Insights from the U.S. Long Term Ecological Research Network. Ecosphere, 2021, 12, e03431.

J.C. Zinnert,  J.B. Nippert, J.A. Rudgers, S.C. Pennings, G. González, M. Alber, S.G. Baer, J.M. Blair, A. Burd, S.L. Collins, C. Craft, D. Di Iorio, W.K. Dodds, P.M. Groffman, E. Herbert, C. Hladik, F. Li, M.E. Litvak, S. Newsome, J. O’Donnell, W.T. Pockman, J. Schalles, and D.R. Young. State Changes: Insights from the U.S. Long Term Ecological Research Network. Ecosphere, 2021, 12, ecs2.3433.

C.A. Bahlai, C. Hart, M.T. Kavanaugh, J.D. White, R.W. Ruess, T.J. Brinkman, H.W. Ducklow, D.R. Foster, W.R. Fraser, H. Genet, P.M. Groffman, S.K. Hamilton, J.F. Johnstone, K. Kielland, D.A. Landis, M.C. Mack, O. Sarnelle, and J.R. Thompson. Cascading Effects: Insights from the U.S. Long Term Ecological Research Network. Ecosphere, 2021, 12, ecs2.3430.

T. Fahey, P. Bohlen, T.R. Feldpausch, M. Fisk, M. Goebel, P.M. Groffman, J. Maerz, and J. Yavitt. Tracing Carbon Flow through a Sugar Maple Forest and its Soil Components: Role of Invasive Earthworms. Plant and Soil, 2021, 464, 517–537.

J. Smith, R.A. Hallett, M. Deeb, and P.M. Groffman. Fine-Scale Heterogeneity of Urban Soils: Implications for Forest Restoration. Restoration Ecology, 2021, 29, e13409.

J.M. Engebretson, K.C. Nelson, K.L. Larson, R. Andrade, M.M. Wheeler, S.B. Lerman, D.H. Locke, T.L.E. Trammell, and P.M. Groffman. Ambiguity and Clarity in Residential Yard Ordinances across Metropolitan Areas in the United States. Journal of Urban Affairs, 2021.

P. Zarnetske, J. Gurevitch, J. Franklin, P.M. Groffman, C. Harrison, J.J. Hellmann, F.M. Hoffman, S. Kothari, A. Robock, S. Tilmes, D. Visioni, J. Wu, L. Xia, and C.-E. Yang. Potential Ecological Impacts of Climate Intervention by Reflecting Sunlight to Cool Earth. Proceedings of the National Academies of Science, 2021, 118, e1921854118.

S. Inamdar, M. Peipoch, A. Gold, E. Lewis, J. Hripto, M. Sherman, K. Addy, D. Merritts, J. Kan, P.M. Groffman, R. Walter, and T. Trammell. Ghosts of Landuse Past: Legacy Effects of Milldams for Riparian Nitrogen (N) Processing and Water Quality Functions. Environmental Research Letters, 2021, 16, 035016.

A.M. Matsler, T.R. Miller, and P.M. Groffman. The Eco-Techno Spectrum: Exploring Knowledge Systems’ Challenges in Green Infrastructure Management. Urban Planning, 2021, 6,49-626.

L.L. Taylor, C.T. Driscoll, P.M. Groffman, G.H. Rau, J.D. Blum, and D.J. Beerling. Increased Carbon Capture by a Silicate-Treated Forested Watershed Affected by Acid Deposition. Biogeosciences, 2021, 18, 169-188.

A.K. Suchy, P.M. Groffman, L.E. Band, J.M. Duncan, A.J. Gold, J.M. Grove, D.H. Locke, and L. Templeton. A Landscape Approach to Nitrogen Cycling in Urban Lawns reveals the Interaction between Topography and Human Behaviors. Biogeochemistry, 2021, 152, 73–92.

J.L. Campbell, L.E. Rustad, S.W. Bailey, E.S. Bernhardt, C.T. Driscoll, M.B. Green, P.M. Groffman, G.M. Lovett, W.H. McDowell, K.J. McGuire, and E.J. Rosi. Watershed Studies at the Hubbard Brook Experimental Forest: Building on a Long Legacy of Research with New Approaches and Sources of Data. Hydrological Processes, 2021, 35, e14016.

J.A. Jones, P.M. Groffman, J. Blair, F.W. Davis, H. Dugan, E.E. Euskirchen, S.D. Frey, T.K. Harms, E. Hinckley, M. Kosmala, S. Loberg, S. Malone, K. Novick, S. Record, A.V. Rocha, B. L. Ruddell, E.H. Stanley, C. Sturtevant, A. Thorpe, T. White, W.R. Wieder, L. Zhai, and K. Zhu. 2021. Synergies among Environmental Science Research and Monitoring Networks: A Research Agenda. Earth's Future, 2021, 9, e2020EF001631.

A. Zimmerman and P.M. Groffman. Evolving Governance in the U.S. Long Term Ecological Research Network. In The Challenges of Long Term Ecological Research: A Historical Analysis. R.B. Waide and S.E. Kingsland, Eds. Springer: New York, 2020.

P.M. Groffman. How Reliable is the Green in Green Infrastructure? In Urban Infrastructure: Reflections for 2100. S. Derrible and M. Chester, Eds. Amazon Press: Phoenix, AZ, 2020.

J.P. Cubino, J. Cavender-Bares, S.B. Lerman, P.M. Groffman, M.L. Avolio, T.L.E. Trammel, M.M. Wheeler, K. Larson, D. Narango, C. Neill, A.R. Bratt, S. Hall, and S.E. Hobbie. Taxonomic, Phylogenetic, and Functional Composition and Homogenization of Residential Yard Vegetation with Contrasting Management. Landscape and Urban Planning, 2020, 102, 103877.

K.L. Larson, R. Andrade, K.C. Nelson, M.M. Wheeler, J.M. Engebreston, S.J. Hall, M.L. Avolio, P.M. Groffman, M. Grove, J.B. Heffernan, S.E. Hobbie, S. Lerman, D. H. Locke, C. Neill, R.R. Chowdhury, and T.L.E. Trammell. Municipal Regulation of Residential Landscapes across US cities: Patterns and Implications for Landscape Sustainability. Journal of Environmental Management, 2020, 275, 111132.

L.E. Rustad, J.L. Campbell, C.T. Driscoll, T.J. Fahey, P.M. Groffman, P. Schaberg, G.J. Hawley, I. Halm, F. Bowles, W. Leuenberger, G. Schwanter, G. Winant, and B. Leonardi. Experimental Approach and Initial Forest Response to a Simulated Ice Storm Experiment in a Northern Hardwood Forest. PLOS ONE, 2020, 15, 9, e0239619.

M. Deeb, P.M. Groffman, J. Blouin, S.P. Egendorf, A. Vergnes, D.L. Cao, D. Walsh, T. Morin, V. Vasenev, and G. Séré. Using Constructed Soils for Green Infrastructure - Challenges and Limitations. SOIL, 2020, 6, 413-434.

J. Smith, R.A. Hallett, and P.M. Groffman. The State Factor Model and Urban Forest Restoration. Journal of Urban Ecology, 2020, 6.

E.S.M. Dukes, J. Galloway, L.E. Band, L. Cattaneo, P.M. Groffman, A.M. Leach, and E.A. Castner. A Community Nitrogen Footprint Analysis of Baltimore City, Maryland. Environmental Research Letters, 2020, 15, 075007.

J.L. Campbell, L.E. Rustad, C.T. Driscoll, I. Halm, T.J. Fahey, H. Fakhraei, P.M. Groffman, G.J. Hawley, W. Leuenberger, and P.G. Schaberg. Simulating Ice Storm Impacts on Forest Ecosystems. Journal of Visualized Experiments (JOVE), 2020, 160, e61492.

J. Engebretson, K. Nelson, L. Ogden, K. Larson, J.M. Grove, S. Hall, D. Locke, D. Pataki, R. Roy Chowdhury, T. Trammell and P.M. Groffman. How the Nonhuman World Influences Homeowner Yard Management in the American Residential Macrosystem. Human Ecology, 2020, 48, 347–356.

A.A. Paltseva, Z. Cheng, S.P. Egendorf, and P.M. Groffman. Remediation of an Urban Garden with Elevated Levels of Soil Contamination. Science of The Total Environment, 2020, 722, 137965.

M.O. Garcia, P.H. Templer, P.O. Sorensen, R. Sanders-DeMott, P.M. Groffman and J.M. Bhatnagar. Soil Microbes Trade-Off Biogeochemical Cycling for Stress Tolerance Traits in Response to Year-Round Climate Change. Frontiers in Microbiology, 2020, 11, 616.

S.P. Egendorf, P. Groffman, G. Moore, and Z. Cheng. The Limits of Lead (Pb) Phytoextraction and Possibilities of Phytostabilization in Contaminated Soil: A Critical Review. International Journal of Phytoextraction, 2020, 22, 9, 916-930.

J.P. Cubino, M.L. Avolio, M. Wheeler, K. Larson, S. Hobbie, J. Cavender-Bares, K. Nelson, T. Trammell, C. Neill, D. Pataki, J.M. Grove, S. Hall, and P.M. Groffman. Linking Yard Plant Diversity to Homeowners’ Landscaping Priorities across the U.S. Landscape and Urban Planning, 2020, 196, 103740.

S.TA. Pickett, M.L. Cadenasso, M.A. Baker, C. Boone, G. Buckley, P.M. Groffman, J.M. Grove, E. Irwin, S. Kaushal, S. LaDeau, A. Miller, C. Nilon, M. Romolini, E. Rosi, C. Swan and K. Szlavecz. Theoretical Perspectives of the Baltimore Ecosystem Study: Conceptual Evolution in a Social-Ecological Research Project. BioScience, 2020, 70, 297-314.

E.E. Gaiser, D.M. Bell, M.C.N. Castorani, D.L. Childers, P.M. Groffman, C.R. Jackson, J.S. Kominoski, D.P.C. Peters, S.T.A. Pickett, J. Ripplinger, and J.C. Zinnert. Long-Term Ecological Research and Evolving Frameworks of Disturbance Ecology. BioScience, 2020, 70, 141-156.

T.L.E. Trammell, D.E. Pataki, R.V. Pouyat, P.M. Groffman, C. Rosier, N. Bettez, J. Cavender-Bares, M.J. Grove, S.J. Hall, J. Heffernan, S.E. Hobbie, J.L. Morse, C. Neill, and M. Steele. Urban Soil Carbon and Nitrogen Converge at a Continental Scale. Ecological Monographs, 2020, 90, 2, e01401.

J.N. Weitzman, P.M. Groffman, J.L. Campbell, C.T. Driscoll, R.T. Fahey, T.J. Fahey, P.G. Schaberg, and L.E. Rustad. Ecosystem Nitrogen Response to a Simulated Ice Storm in a Northern Hardwood Forest. Ecosystems, 2019, 23, 1186–1205.

D.H. Locke, C. Polsky, J.M. Grove, P.M. Groffman, K.C. Nelson, K.L. Larson, J. Cavender-Bares, J.B. Heffernan, R.R. Chowdhury, S.E. Hobbie, N.D. Bettez, S.J. Hall, C. Neill, L. Ogden, and J. O’Neil-Dunne. Residential Household Yard Care Practices along Urban-Exurban Gradients in Six Climatically-Diverse U.S. Metropolitan Areas. PLoS ONE, 2019, 14, 11, e0222630.

L.E. Frelich, B. Blossey, E.K. Cameron, A. Dávalos, N. Eisenhauer, T. Fahey, O. Ferlian, P.M. Groffman, E. Larson, S.R. Loss, J.C. Maerz, V. Nuzzo, K. Yoo, and P.B. Reich. Side‐Swiped: Ecological Cascades Emanating from Earthworm Invasions. Frontiers in Ecology and Environment, 2019, 17, 9, 502–510.

L.K. Templeton, M.C. Neel, P.M. Groffman, M.L. Cadenasso, and J.H. Sullivan. Changes in Vegetation Structure and Composition of Urban and Rural Forest Patches in Baltimore from 1998 to 2015. Forest Ecology and Management, 2019, 454, 117665.

P.M. Groffman, J.M. Grove, D. Locke, A. Troy, J. O’Neil-Dunne, and W. Zhou. Lawns as Common Ground for Society and the Flux of Water and Nutrients. In Science for the Sustainable City. S.T.A. Pickett, M.L. Cadenasso, J.M. Grove, E.G. Irwin, E.J. Rosi, and C.M. Swan, Eds. Yale University Press: New Haven, CT, 2019. pp 220–235.

P.M. Groffman, L.E. Band, K.T. Belt, N.D. Bettez, A. Bhaskar, E. Doheny, J.M. Duncan, S.S. Kaushal, E.J. Rosi, and C. Welty. Applying the Watershed Approach to Urban Ecosystems. In Science for the Sustainable City. S.T.A. Pickett,  M.L. Cadenasso, J.M. Grove, E.G. Irwin, E.J. Rosi, and C.M. Swan, Eds. Yale University Press: New Haven, CT, 2019. pp 155–173.

M. Almaraz, P.M. Groffman, and S. Porder. Effects of Changes in Nitrogen Availability on Nitrogen Gas Emissions in a Tropical Forest During a Drought. J. Geophys. Res. Biogeosci., 2019, 124, 9, 2917–2926.

C.A. Roco, P. Dörsch, J. G. Booth, C. Pepe-Ranney, P.M. Groffman, T.J. Fahey, J.B. Yavitt, and J.P. Shapleigh. Using Metagenomics to Reveal Landscape Scale Patterns of Denitrifiers in a Montane Forest Ecosystem. Soil Biology and Biochemistry, 2019, 138, 107585.

K. Addy, A.J. Gold, M. Welsh, P. August, M. Stolt, C. Arango, and P.M. Groffman. Connectivity and Nitrate Uptake Potential of Intermittent Streams in the Northeast USA. Frontiers in Ecology and Evolution, 2019.

A.J. Reisinger, T.R. Doody, P.M. Groffman, S.S. Kaushal, and E.J. Rosi. Seeing the Light: Urban Stream Restoration Affects Stream Metabolism and Nitrate Uptake via Changes in Canopy Cover. Ecological Applications, 2019, 29, 6, e01941.

J.L. Joyner, J. Kerwin, M. Deeb, G. Lozefski, B. Prithiviraj, A. Paltseva, J. McLaughlin, P. Groffman, Z. Cheng, and T.R. Muth. Green Infrastructure Design Influences Communities of Urban Soil Bacteria. Front. Microbiol., 2019, 10, 982.

S.R. Weintraub, A.N. Flores, W.R. Wieder, D. Sihi, C. Cagnarini, D.R.P. Gonçalves, M.H. Young, L. Li, Y. Olshansky, R. Baatz, P.L. Sullivan, and P.M. Groffman. Leveraging Environmental Research and Observation Networks to Advance Soil Carbon Science. J. Geophys. Res. Biogeosci., 2019, 124, 5, 1047–1055.

P.O. Sorensen, J.M. Bhatnagar, L. Christenson, J. Duran, T. Fahey, M.C. Fisk, A.C. Finzi, P.M. Groffman, J.L. Morse, and P.H. Templer. Roots Mediate the Effects of Snowpack Decline on Soil Bacteria, Fungi, and Nitrogen Cycling in a Northern Hardwood Forest. Front. Microbiol., 2019, 10, 926.

R. Sanders-DeMott, J.L. Campbell, P.M. Groffman, L.E. Rustad, and P.H. Templer. Soil Warming and Winter Snow Packs: Implications for Northern Forest Ecosystem Functioning. In Ecosystem Consequences of Soil Warming: Microbes, Vegetation, Fauna and Soil Biogeochemistry. J. Mohan, Ed. Academic Press: Cambridge, MA, 2019. 11.

T.L.E. Trammell, D.E. Pataki, C.J. Still, J.R. Ehleringer, M.L. Avolio, N. Bettez, J. Cavender-Bares, P.M. Groffman, M. Grove, S.J. Hall, J. Heffernan, S.E. Hobbie, K.L. Larson, J.L. Morse, C. Neill, K.C. Nelson, J. O’Neil-Dunne, W.D. Pearse, R.R. Chowdhury, M. Steele, et al. Climate and Lawn Management Interact to Control C4 Plant Distribution in Residential Lawns across Seven U.S. Cities. Ecological Applications, 2019, 29, 4, e01884.

J. Padullés Cubino, J. Cavender-Bares, S.E. Hobbie, S.J. Hall, T.L.E. Trammell, C. Neill, M.L. Avolio, L.E. Darling, P.M. Groffman. Contribution of Non-Native Plants to the Phylogenetic Homogenization of U.S. Yard Floras. Ecosphere, 2019, 10, 3, e02638.

X. Ni, S. Liao, F. Wu, and P.M. Groffman. Short-Term Precipitation Pulses Stimulate Soil CO2 Emission but Do Not Alter CH4 and N2O Fluxes in a Northern Hardwood Forest. Soil Biology and Biochemistry, 2019, 130, 8–11.

J.P. Cubino, J. Cavender-Bares, S.E. Hobbie, D.E. Patkai, M.L. Avolio, L.E. Darling, K.L. Larson, S.J. Hall, P.M. Groffman, T.L.E. Trammell, M.K. Steele, J.M. Grove, and C. Neill. Drivers of Plant Richness and Phylogenetic Composition in Urban Yards at the Continental Scale. Landscape Ecology, 2019, 34, 63–77.

M. Deeb, P.M. Groffman, J.L. Joyner, G. Lozefski, A. Paltseva, B. Lin, K. Mania, D. L. Cao, J. McLaughlin, T. Muth, B. Prithiviraj, J. Kerwin, and Z. Cheng. Soil and Microbial Properties of Green Infrastructure Stormwater Management Systems. Ecological Engineering, 2018, 125, 68-75.

A. Paltseva, Z. Cheng, M. Deeb, P.M. Groffman, R.K. Shaw, and M. Maddaloni. Accumulation of Arsenic and Lead in Garden-Grown Vegetables: Factors and Mitigation Strategies. Science of the Total Environment, 2018, 640, 273-283.

D. Bird, P.M. Groffman, C. Salice, and J. Moore. Steady-State Land Cover but Non-Steady-State Major Ion Chemistry in Urban Streams. Environmental Science & Technology, 2018, 52, 22, 13015–13026.

B.R. Rosenzweig, P.M. Groffman, C.B. Zarnoch, B.F. Branco, E.K. Hartig, J. Fitzpatrick, H.M. Forgione, and A. Parris. Nitrogen Regulation by Natural Systems in “Unnatural” Landscapes: Denitrification in Ultra-Urban Coastal Ecosystems. Ecosystem Health and Sustainability, 2018, 4, 9, 205-224.

D.H. Locke, M. Avolio, T.L.E. Trammel, R. Roy Chowdhury, J.M. Grove, J. Rogan, D.G. Martin, N. Bettez, J. Cavender-Bares, P.M. Groffman, S.J. Hall, J.B. Heffernan, S.E. Hobbie, K.L. Larson, J.L. Morse, C. Neill, K.C. Nelson, L.A. Ogden, J. O’Neil-Dunne, D.E. Pataki, W.D. Pearse, C. Polsky, and M.M. Wheeler. A Multi-City Comparison of Front and Backyard Differences in Plant Species Diversity and Nitrogen Cycling in Residential Landscapes. Landscape and Urban Planning, 2018, 178, 102-111.

H. Asbjornsen, J. Campbell, K. Jennings, M. Vadeboncoeur, C. McIntire, P. Templer, R. Phillips, T. Bauerle, M. Dietze, S. Frey, P. Groffman, R. Guerrieri, P. Hanson, E. Kelsey, A. Knapp, N. McDowell, P. Meir, K. Novick, S. Ollinger, W. Pockman, P. Schaberg, S. Wullschleger, M. Smith, and L. Rustad. Guidelines and Considerations for Designing Field Experiments Simulating Precipitation Extremes in Forest Ecosystems. Methods in Ecology and Evolution, 2018, 9, 12, 2310-2325.

X. Ni and P.M. Groffman. Declines in Methane Uptake in Forest Soils. PNAS, 2018, 115, 34, 8587-8590.

D.D. Richter, S.A. Billings, P.M. Groffman, E.F. Kelly, K.A. Lohse, W.H. McDowell, C.S. Riebe, W.S. Silver, T.S. White, S.A. Anderson, S. Brantley, Z.S. Brecheisen, O.A. Chadwick, H.E. Hartnett, S.E. Hobbie, C.E. Kazanski, D. Markewitz, K. O’Neill, P. Schroeder, and A. Thompson. Ideas and Perspectives: Elevating the Biogeosciences within Environmental Research Networks. BioGeoSciences, 2018, 15, 4815-4832.

D.H. Locke, R. Roy Chowdhury, J.M. Grove, D.G. Martin, E. Goldman, J. Rogan, and P.M. Groffman. Social Norms, Yard Care, and the Difference between Front and Back Yard Management: Examining the Landscape Mullets Concept on Urban Residential Lands. Society and Natural Resources, 2018, 31, 1169-1188.

A.J. Reisinger, E. Woytowitz, E. Majcher, E.J. Rosi, K.T. Belt, J.M. Duncan, S.S. Kaushal, and P.M. Groffman. Changes in Long-Term Water Quality of Baltimore Streams are Associated with Both Gray and Green-Infrastructure. Limnology and Oceanography, 2018, 17, 1-17.

A. Paltseva, Z. Cheng, M. Deeb, P.M. Groffman, and M. Maddaloni. Variability of Bioaccessible Lead in Urban Garden Soils. Soil Science, 2018, 83, 4, 123-131.

S.P. Egendorf, Z. Cheng, M. Deeb, V. Flores, A. Paltseva, D. Walsh, P. Groffman, and H. Mielke. Constructing Soil for Mitigating Lead (Pb) Exposure and Promoting Urban Community Gardening: The New York City Clean Soil Bank Pilot Study. Landscape and Urban Planning, 2018, 175, 184-194.

J.R. Blaszczak, M. Steele, B.D. Badgley, J.B. Heffernan, S.E. Hobbie, J.L. Morse, E. Rivers, S. Hall, C. Neill, D.E. Pataki, P.M. Groffman, and E.S. Bernhardt. Sediment Chemistry of Urban Stormwater Ponds and Controls on Denitrification. Ecosphere, 2018, 9, 6, e02318.

R. Baatz, P.L. Sullivan, L. Li, S. Weintraub, H.W. Loescher, M. Mirtl, P.M. Groffman, D.H. Wall, M. Young, T. White, H. Wen, S. Zacharias, I. Kühn, J. Tang, J. Gaillardet, I. Braud, A.N. Flores, P. Kumar, H. Lin, T. Ghezzehei, H.L. Gholz, H. Vereecken, and K. Van Looy. Steering Operational Synergies in Terrestrial Observation Networks: Opportunity for Advancing Earth System Dynamics Modelling. Earth System Dynamics, 2018, 9, 593-609.

P.M. Groffman, C.T. Driscoll, J. Durán, J.L. Campbell, L.M. Christenson, T.J. Fahey, M.C. Fisk, C. Fuss, G.E. Likens, G. Lovett, L. Rustad, and P.H. Templer. Nitrogen Oligotrophication in Northern Hardwood Forests. Biogeochemistry, 2018, 141, 523-539.

S.Q. Yao, P.M. Groffman, C. Alewell, and K.A. Ballantine. Soil Amendments Promote Denitrification in Restored Wetlands. Restoration Ecology, 2018, 26, 294-302.

A.J. Webster, P.M. Groffman, and M.L. Cadenasso. Controls on Denitrification Potential in Nitrate-Rich Waterways and Riparian Zones of an Irrigated Agricultural Setting. Ecological Applications, 2018, 28, 1055-1067.

W.D. Pearse, J. Cavender-Bares, S.E. Hobbie, M. Avolio, N.D. Bettez, R. Roy Chowdhury, L.E. Darling, P.M. Groffman, J. Morgan Grove, S.J. Hall, J.B. Heffernan, J. Learned, C.B. Neill, K. Nelson, D. Pataki, B. Ruddell, M. Steele, and T.L.E. Trammell. Ecological Homogenisation in North American Urban Yards: Vegetation Diversity, Composition, and Structure. Ecosphere, 2018, 9, 2, e02105.

J.L. Gutiérrez, C.G. Jones, P.D. Ribeiro, S.E.G. Findlay, and P.M. Groffman. Crab Burrowing Limits Surface Litter Accumulation in a Temperate Salt Marsh: Implications for Ecosystem Functioning and Connectivity. Ecosystems, 2018, 21, 1000-1012.

M.M. Wheeler, C. Neill, P.M. Groffman, M. Avolio, N.D. Bettez, J. Cavender-Bares, R. Roy Chowdhury, L. Darling, J.M. Grove, S. J. Hall, J.B. Heffernan, S.E. Hobbie, K.L. Larson, J.L. Morse, K. Nelson, L.A. Ogden, and J. O’Neil-Dunne. Continental-Scale Homogenization of Residential Lawn Plant Communities. Landscape and Urban Planning, 2017, 165, 54-63.

K.A. Ballantine,  T.R. Anderson, E.A. Pierce, and P.M. Groffman. Restoration of Denitrification in Agricultural Wetlands. Ecological Engineering, 2017, 106, 570-577.

J.M. Duncan, C. Welty, J.T. Kemper, P.M. Groffman, and L.E. Band. Dynamics of Nitrate Concentration-Discharge Patterns in an Urban Watershed. Water Resources Research, 2017, 53, 8, 7349-7365.

P.M. Groffman, M. Avolio, J. Cavender-Bares, N.D. Bettez, J. Morgan Grove, S.J. Hall, S.E. Hobbie, K.L. Larson, S.B. Lerman, D.H. Locke, J.B. Heffernan, J.L. Morse, C. Neill, K.C. Nelson, J. O’Neil-Dunne, D.E. Pataki, C. Polsky, R. Roy Chowdhury, and T.L.E. Trammell. Ecological Homogenization of Residential Macrosystems. Nature Ecology and Evolution, 2017, 1, 0191.

M.M. Palta, N.B. Grimm, and P.M. Groffman. “Accidental” Urban Wetlands: Potential Extent and Associated Ecosystem Functions. Frontiers in Ecology and Environment, 2017, 15, 5, 248-256.

S. Pierre, I. Hewson, J.P. Sparks, C.M. Litton, C. Giardina, P.M. Groffman, and T.J. Fahey. Ammonia Oxidizer Populations Drive Nitrogen Cycling Across a Tropical Montane Mean Annual Temperature Gradient. Ecology, 2017, 98, 1896-1907.

A.J. Reisinger, E. Rosi-Marshall, H. Bechtold, T. Doody, S. Kaushal, and P.M. Groffman. Recovery of Urban Stream Metabolism Following Superstorm Sandy and Other Flood Events. Ecosphere, 2017, 8, 4, e01776.

J. Durán, J.L. Morse, A. Rodríguez, J.L. Campbell, L.M Christenson, C.T. Driscoll, T.J. Fahey, M.C. Fisk, M.J. Mitchell, P.H. Templer, and P.M. Groffman. Differential Sensitivity to Climate Change of C and N Cycling Processes Across Soil Horizons in a Northern Hardwood Forest. Soil Biology and Biochemistry, 2017, 107, 77-84.

M.V. Kulkarni, J.B. Yavitt, and P.M. Groffman. Rapid Conversion of Added Nitrate to N2 in Northern Forest Soils. Geomicrobiology Journal, 2017, 34, 670-676.

K. Minick, M.C. Fisk, and P.M. Groffman. Soil Calcium Alters Mineralization of Soil Organic Carbon and Leaf Litter in the Oa Horizon of a Northern Hardwood Forest. Biogeochemistry, 2017, 132, 343-357.

J.E. Hickman, Y. Huang, C. Palm, S. Wu, W. Diru, and P. Groffman. Non-Linear Response of Nitric Oxide Fluxes to Fertilizer Inputs and the Impacts of Agricultural Intensification on Tropospheric Ozone Pollution in Africa. Global Change Biology, 2017, 23, 3192-3204.

S. Chamberlain, P.M. Groffman, E. Boughton, N. Gomez-Casanova, E. DeLucia, C. Bernacchi, and J. Sparks. The Impact of Water Management Practices on Subtropical Pasture Methane Emissions and Ecosystem Service Payments. Ecological Applications, 2017, 27, 1199-1209.

S.T.A. Pickett, M.L. Cadenasso, E.J. Rosi-Marshall, K.T. Belt, P.M. Groffman, J.M. Grove, E.G. Irwin, S.S. Kaushal, S.L. LaDeau, C.H. Nilon, C.M. Swan, and P.S. Warren. Dynamic Heterogeneity: A Framework to Promote Ecological Integration and Hypothesis Generation in Urban Systems. Urban Ecosystems, 2017, 20, 1-14.

J.M. Duncan, L.E. Band, and P.M. Groffman. Variable Nitrate Concentration–Discharge Relationships in a Forested Watershed. Hydrological Processes, 2017, 31, 1817-1824.

P.M. Groffman, M.L. Cadenasso, J. Cavender-Bares, D.L. Childers, N.B. Grimm, J.M. Grove, S.E. Hobbie, L.R. Hutyra, D.G. Jenerette, T. McPhearson, D.E. Pataki, S.T.A. Pickett, R.V. Pouyat, E.J. Rosi-Marshall, and B.L. Ruddell. Moving Towards a New Urban Systems Science. Ecosystems, 2017, 20, 38-43.

S.P. Pierre, P.M. Groffman, M.E. Killelea, and E.E. Oldfield. Soil Microbial Nitrogen Cycling and Nitrous Oxide Emissions from Urban Afforestation in The New York City Afforestation Project. Urban Forestry & Urban Greening2016, 15, 1490154.

L.E. McPhillips, P.M. Groffman, R.L. Schneider, and M.T. Walter. Nutrient Cycling in Grassed Roadside Ditches and Lawns in a Suburban Watershed. Journal of Environmental Quality, 2016, 45, 1901-1909.

M.M. Palta, J.G. Ehrenfeld, D. Gimenez, P.M. Groffman, and V. Subroy. Soil Texture and Water Retention as Spatial Predictors of Denitrification in Urban Wetlands. Soil Biology and Biochemistry2016, 101, 237-250.

C.B. Fuss, C.T. Driscoll, P.M. Groffman, J.L. Campbell, L.M. Christenson, T.J. Fahey, M.C. Fisk, M.J. Mitchell, P.H. Templer, J. Durán and J.L. Morse. Nitrate and Dissolved Organic Carbon Mobilization in Response to Soil Freezing Variability. Biogeochemistry2016, 131, 35-47.

P.O. Sorensen, P.H. Templer, L. Christenson, J. Durán, T. Fahey, M.C. Fisk, P.M. Groffman, J.L. Morse, and A.C. Finzi. Reduction in Snow Cover Alters Root-Microbe Interactions and Decreases Nitrification in a Northern Hardwood Forest. Ecology2016, 97, 3359-3368.

A.J. Reisinger, P.M. Groffman, and E.J. Rosi-Marshall. Nitrogen Cycling in Urban Ecosystems: A Review of Process Rates across Key Urban Ecosystems. FEMS Microbiology Ecology2016, 92.

C.B. Fuss, C.T. Driscoll, M.B. Green, and P.M. Groffman. Hydrologic Flowpaths during Snowmelt in Forested Headwater Catchments under Differing Winter Climatic and Soil Frost Regimes. Hydrological Processes2016, 30, 4617-4632.

J. Caputo, C.M. Beier, V.A. Luzadis and P.M. Groffman. Integrating Beneficiaries into Assessment of Ecosystem Services from Managed Forests at the Hubbard Brook Experimental Forest, USA. Forest Ecosystems2016, 3, 13.

Z. Cui, C.W. Welty, A.J. Gold, P.M. Groffman, S.S. Kaushal, and A.J. Miller. Use of a Three-Dimensional Reactive Solute Transport Model for Evaluation of Bioreactor Placement in Channel Restoration. Journal of Environmental Quality2016, 45, 839-846.

F.M. Soper, P.M. Groffman, and J.P. Sparks. Denitrification in a Subtropical, Semi-Arid North American Savanna: Field Measurements and Intact Soil Core Incubations. Biogeochemistry2016, 128, 257-266.

F.M. Soper, T.W. Boutton, P.M. Groffman, and J.P. Sparks. Nitrogen Trace Gas Fluxes from a Semi-Arid Subtropical Savanna under Woody Legume Encroachment. Global Biogeochemical Cycles2016, 30, 614-628.

S.D. Chamberlain, N. Gomez-Casanovas, M.T. Walter, E.H. Boughton, C.J. Bernacchi, E.H. DeLucia, P.M. Groffman, E.W. Keel, and J.P. Sparks. Influence of Transient Flooding on Methane Fluxes from Subtropical Pastures. Journal of Geophysical Research Biogeosciences2016, 121, 3, 965-977.

K.C. Weathers, P.M. Groffman, E. Van Dolah, E.S. Bernhardt, N.B. Grimm, K. McMahon, J. Schimel, M. Paolisso, R. Maranger, S. Baer, K. Brauman, and E.L. Hinckley. Frontiers In Ecosystem Ecology from a Community Perspective: The Future Is Boundless and Bright. Ecosystems2016, 19, 753–770.

P.M. Groffman, J.M. Grove, C. Polsky, N.D. Bettez, J.L. Morse, J. Cavender-Bares, S.J. Hall, J.B. Heffernan, S.E. Hobbie, K.L. Larson, C. Neill, K. Nelson, L. Ogden, J. O’Neil-Dunne, D. Pataki, R.R. Chowdhury, and D.H. Locke. Satisfaction, Water and Fertilizer Use in the American Residential Macrosystem. Environmental Research Letters2016, 11, 1-7.

T.L.E. Trammell, D.E. Pataki, J. Cavender-Bares, P.M. Groffman, S.J. Hall, J.B. Heffernan, S.E. Hobbie, J.L. Morse, C. Neill, and K.C. Nelson. Plant Nitrogen Concentration and Isotopic Composition in Residential Lawns across Seven U.S. Cities. Oecologia2016, 181, 271-85.

K.L. Larson, K.C. Nelson, S.R. Samples, S.J. Hall, N. Bettez, J. Cavender-Bares, P.M. Groffman, J.M. Grove, J.B. Heffernan, S.E. Hobbie, J. Learned, J.L. Morse, C. Neill, L.A. Ogden, J. O’Neil-Dunne, D.E. Pataki, C. Polsky, R. Roy Chowdhury, M. Steele, and T.L.E. Trammell. Ecosystem Services in Managing Residential Landscapes: Priorities, Value Dimensions, and Cross-Regional Patterns. Urban Ecosystems2016, 19, 95-113.

J. Caputo, C.M. Beier, P.M. Groffman, D.A. Burns, F.D. Beall, P.W. Hazlett, and T.E. Yorks. Effects of Harvesting Forest Biomass on Ecosystem Capacity to Provide Water and Climate Regulation Services: A Synthesis of Long-Term Experiments in Eastern North America. Ecosystems2016, 19, 271-283.

N.B. Grimm, P.M. Groffman, M. Staudinger, and H. Tallis. Climate Change Impacts on Ecosystems and Ecosystem Services in the United States: Process and Prospects for Sustained Assessment. Climatic Change2016, 135, 97-106.

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