Peer-reviewed publications  (* indicates lab member)


72. Almaraz, M.*, P.M. Groffman, W.L. Silver,  S.J. Hall, Y. Lin, C. O’Connell and S. Porder (2023). Dinitrogen emissions dominate nitrogen gas emissions from soils with low oxygen availability in a moist tropical forest. JGR Biogeosciences

71. Porder, S. (in press) Elemental: How Microbes, Plants and People Harnessed Five Essential Elements to Change the World Princeton University Press. In Stores Sept. 12, 2023.

70. Rastetter, E.B., B.L. Kwiatkowski, D.W. Kicklighter, A.B. Plotkin, H. Genet, J.B. Nippert, K. O’Keefe, S.S. Perakis, S. Porder, S.S. Roley, R.W. Ruess, J.R. Thompson, W.R. Wieder, K. Wilcox, R.D. Yanai (2022).  N and P constrain C in ecosystems under climate change: Role of nutrient redistribution, accumulation, and stoichiometry. Ecological Applications e2684

69. Charbonnier Q., J. Bouchez, J. Gaillardet, É. Gayer, S. Porder (2022). A global imbalance in potassium and barium river export: the result of biological uptake. Geochemical Perspectives Letters 21, 32-36.

68. Ficano, N*, S,Porder, and L.A. McCulloch* (2021). Legume investment in microbial symbionts is influenced by light and soil nitrogen in Neotropical canopy gaps. Ecology. 102 (11) e03489

67. Osborne, B.B.*, F. Soper, M. Nasto, D. Bru, S. Hwang, M.B. Machmuller, M Lopez Morales, L. Philippot, B.W. Sullivan, G.P. Asner, C.C. Cleveland, A.R. Townsend, and S. Porder (2021). Litter inputs drive patterns of soil nitrogen heterogeneity in a diverse tropical forest: results from a litter manipulation experiment. Soil Biology and Biochemistry.

66. Massmann, A.*, M. Cavaleri, S. Oberbauer, P. Olivas and S. Porder (2021).  Foliar stochiometry is marginally sensitive to soil phosphorus across a lowland tropical rainforest. Ecosystems.

65.  McCulloch, L.* and S. Porder (2021).  Light fuels symbiotic nitrogen fixation “hotspots” in Neotropical canopy gaps.  New Phytologist. DOI: 10.1111/nph.17519

64. Bomeisl, L. C. Neill, S. Porder, C.E. Cerri, P. Brando and E. Roy * (2020).  Tropical soybean response to reduced or zero phosphorus fertilization depends on soils. Agrosystems, Geosciences and Environment.

63. McCulloch, L.* and S. Porder (2020).  Lower nodule biomass with increased nitrogenase efficiency in Robinia pseudoacacia seedlings when grown under low soil phosphorus conditions.  SN Applied Sciences 2:1785.

62. McCulloch, L.*, D. Piotto and S. Porder (2020).  Effects of drought and soil nutrient on symbiotic nitrogen fixation in seedlings from eight neotropical legume species.  Biotropica.DOI: 10.1111/btp.12911

61. Osborne, B.B.*, MK Nasto, FM Soper, GP Asner, CS Balzotti, CC Cleveland, PG Taylor, AR Townsend, S Porder (2020). Leaf litter inputs reinforce islands of nitrogen fertility in a lowland tropical forest. Biogeochemistry 147 (3) 293-306.

60. Almaraz, M*, S. Porder and P. Groffman (2019). Effects of changes in nitrogen availability on nitrogen gas emissions in a tropical forest during a drought.  JGR Biogeosciences. 

59. Hilley, G. E., S. Porder, F. Aron, C.W. Baden, S.A. Johnstone, F. Liu, R. Sare, A. Steelquist, and H.H. Young (2019).  Earth’s topographic relief potentially limited by channel steepness. Nature Geosciences.

58.  Porder, S. (2019).  How plants enhance weathering and how weathering is important to plants.  Elements (invited contribution).DOI: 10.2138/gselements.15.4.241

57. Ryals, R., G. McNicol, S. Porder and S. Kramer (2019).  Greenhouse gas fluxes from human waste management pathways in Haiti.  Journal of Cleaner Production 226:106-113.

56. F.M. Soper, B. Sullivan, M. Nasto, B.B. Osborne*, D. Bru, C. Balzotti, P. Taylor, G. Asner, A. Townsend, L. Philippot, S. Porder, C.C. Cleveland (2018) Remotely sensed canopy nitrogen influences N2O emissions in a lowland tropical rainforest Ecology  99(9), 2080-2089.

55. Winbourne, J.**, M. Harrison, B. Sullivan, S. Alvarez-Clare, S.R. Lins, M. Nasto, D. Piotto, M. Wong and S. Porder (2018). A new framework for evaluating estimates of symbiotic nitrogen fixation in forests.  American Naturalist 192:5, 618-629

54. Winborne, J.B.**, A. Feng***, L. Reynolds***, D. Piotto, M.G. Hastings and S. Porder (2018). Nitrogen cycling during secondary succession in the Atlantic Forest of Bahia, Brazil. Nature Scientific Reports 8:1377. doi:10.1038/s41598-018-19403-0

53. Becknell, J.M.**, M. Keller, D. Piotto, M. Longo, M.N. dos-Santos, M.A. Scaranello, R.B.O. Cavalcante and S. Porder (2018). Landscape scale lidar analysis of aboveground biomass distribution in secondary Brazilian Atlantic Forest.   Biotropica DOI:10.1111/btp.12538

52. Becknell, J.M.**, S.Porder, S. Hancock, R. Chazdon, M. Hofton, J.B. Blair and J.R. Kellner (2018). Chronosequence predictions are robust in a neotropical secondary forest but plots miss the mark. Global Change Biology DOI:10.1111/gcb.14036

51. Nagy, R.C.*, S. Porder, P.M. Brando, E.A. Davidson, M. Figueira, C. Neill, S.Riskin* and S. Trumbore (2017). Soil carbon dynamics in soybean cropland and forests in Mato Grosso, Brazil.   JGRBiogeosciences.DOI:10.1002/2017JG004269

50. Soper, F.M., P.G. Taylor, W.R. Wieder, S.R. Weintraub, C.C. Cleveland, S. Porder and A.R. Townsend. (2017). Modest gaseous nitrogen losses point to conservative nitrogen cycling in a lowland tropical rainforest watershed. Ecosystems doi:10.1007/s10021-017-0193-1

49. Roy, E.D.**, E. Willig ***, P.D. Richards, L.A. Martinelli, F.F. Vazquez, L. Pegorini, S.A.Spera and S. Porder(2017) Little saturation of soil phosphorus sorption capacity even after three decades of intensive fertilization in Mato Grosso, Brazil.   Agriculture, Ecosystems and Environment 249 (1):206-114

48. Neill, C, K. Jankowski, P.M. Brando, M.T. Coe, L.A. Deegan, M.M. Macedo, S.H.Riskin*, S. Porder, H. Elsenbeer, and A.V.Krusche (2017). Surprisingly modest water quality impacts from expansion and intensification of large-scale commercial agriculture in the Brazilian Amazon-Cerrado Region. Tropical Conservation Science 10: 1-5. DOI: 10.1177/1940082917720669

47. Nasto, M., B. Osborne*, Y. Lekberg, G.P.Asner, C. Balzotti, S. Porder, P. Taylor, A.Townsend, C.Cleveland (2017) Nutrient acquisition, soil phosphorus partitioning, and competition among trees in a lowland tropical rain forest New Phytologist DOI: 10.1111/nph.14494

46. Osborne, B.*, M. Nasto, G.Asner, C. Balzotti, C. Cleveland, B. Sullivan, P. Taylor, A.R. Townsend and S. Porder (2017) Climate, topography, and organisms are hierarchical controls of soil N cycling in a Neotropical lowland forest. Ecosystems DOI: 10.1007/s10021-016-0095-7

45. Nagy, R.C.*, E. Rastetter, C. Neill and S. Porder. (2017) Nutrient limitation in tropical secondary forests following different management practices Ecological Applications 27(3):734-755 DOI: 10.1002/eap.1478

44. Riskin, S.H.*, C. Neill, K., Jankowski, A.V. Krusche, R. McHorney, H. Elsenbeer, M. Macedo, D. Nunes and S. Porder (2017) Solute and sediment export from Amazon forest and soybean headwater streams. Ecological Applications 27(1):193-207 DOI: 10.1002/eap.1428

43. Balzotti, C., G.Asner, P.Taylor, C. Cleveland, R. Cole, R.E. Martin, M. Nasto, B.Osborne*, S.Porder, A.Townsend (2016) Environmental controls on canopy foliar N distributions in a neotropical lowland forest Ecological Applications 26(8):2451-2464

42. Balzotti, C., G.Asner, P.Taylor, R. Cole, B.Osborne*, C. Cleveland, S.Porder, A.Townsend (2016)  Topographic distributions of emergent trees in tropical forests of the Osa Peninsula, Costa Rica Ecography DOI: 10.1111/ecog.02062

41. Wolf, J. G. Brocard, J. Willenbring, S. Porder and M. Uriarte. (2016) Abrupt change in forest height along a tropical elevation gradient detected using airborne lidar Remote Sensing doi:10.3390/rs8100864

40. Almaraz, M.* and S. Porder (2016) Measuring ecosystem nitrogen status: a comparison of proxies Biogeosciences doi:10.5194/bg-2016-43

39. Roy, E.D.**, P.D. Richards, L.A. Martinelli, L.D.Coletta, S.R.M. Lins, F.F. Vazquez, E. Willig, S.A. Spera, L.K. VanWey and Stephen Porder (2016) The phosphorus cost of agricultural intensification in the tropics Nature Plants 16043, doi:10.1038/nplants.2016.43

38. Bhaskar, R**, S. Porder , P. Balvanera, E.J. Edwards (2016) Ecological and evolutionary variation in community nitrogen use traits during tropical succession Ecology DOI: 10.1890/15-1162.1

37. McClintock, M., G. Brocard, J. Willenbring, C. Tamayo***, S. Porder and J. Pett-Ridge (2015). Spatial variability of African dust in a montane tropical landscape in Puerto Rico. Chemical Geology 412: 69-81

36. Nagy, R.C.*, S. Porder, C. Neill, P. Brando, R.M. Quintino, Nascimento. (2015). Structure and composition of riparian forest fragments in an Agricultural Amazonian Landscape. Ecological Applications 25(6) 1725-1738

35. Martins, S.C, E.S. Neto, M. de Cassia Piccolo D.Q.A. Almeida, P.B. de Carmago, J.B. do Carmo, S. Porder, S.R.M. Lins, and L.A. Martinelli. (2015). Soil texture and chemical characteristics along an elevation range in the coastal Atlantic Forest of Southeast Brazil. Geoderma Regional 5: 106-115

34. Porder, S, A.H. Johnson, H.X. Xing, G. Brocard, S. Goldsmith ** and J. Pett-Ridge (2015). Linking geomorphology, weathering and cation availability in the Luquillo Mountains of Puerto Rico. Geoderma 249,250:100-110

32. Weintraub, S.R., P.G. Taylor, S. Porder, C.C. Cleveland and A.R. Townsend (2015). Topography controls soil nitrogen availability in lowland tropical forests. Ecology doi:

31. Sullivan, B.W., S. Alvarez-Clare, S.C. Castle, S. Porder, S.C. Reed, L. Schreeg**, A. R. Townsend and C.C. Cleveland. (2014).   Assessing nutrient limitation in complex forested ecosystems: alternatives to large-scale fertilization experiments.  Ecology 95(3): 668-681

30. Porder, S. (2014)  Coevolution of life and landscapes.  Proceedings of the National Academy of Sciences  10.1073/pnas.1315667111

29. Schreeg, L** and S. Porder (2014).  Weak exchange resins alter small-scale soil nutrient levels with minimal direct impact on other elements. Soil Biology & Biochemistry 71:113-116

28. C. Neill, M.T. Coe, S.H. Riskin*, A.V. Krusche, H. Elsenbeer, M.N. Macedo, R. McHorney, P. Lefebvre, E.A Davidson, R. Scheffler, A.M. Silva Figueira, S. Porder and L.A. Deegan. (2013). Watershed responses to Amazon soya bean cropland expansion and intensification. Philosophical Transactions of the Royal Society B doi:10.1098/rstb.2012.0425 (Opinion piece).

27. Riskin, S.H.*, S. Porder, C. Neill, M. Figueria, C. Tubbesing, and N. Mahowald (2013).  The fate of phosphorus fertilizer in Amazon soybean fields.  Philosophical Transactions of the Royal Society B 368:20120154. DOI/10.1098/rstb.2012.0154

26. Riskin, S.H.*, S. Porder, M.E. Schipanski, E.M. Bennett and C.Neill (2013).  Regional differences in the environmental costs of high phosphorus- input soy agriculture. BioScience 63: 49–54. ISSN 0006-3568.  

25. Mage, S.* and S. Porder (2012).  Parent material and topography drive soil P status across the Luquillo Mountains of Puerto Rico. Ecosystems  DOI: 10.1007/s10021-012-9612-5. 

24. S. Porder and S. Ramachandran (2012).  The phosphorus content of common rocks – a potential driver of ecosystem P status.   Plant and Soil DOI 10.1007/s11104-012-1490-2.

23. Townsend, A.R. and S. Porder (2012).  Agricultural legacies, food production and its environmental consequences.   Proceedings of the National Academy of Sciences  109 (16) 5917-5918.

22. M.H. Tang***, S. Porder, and G.Lovett (2012).  Species differences in nitrate reductase activity are unaffected by nitrogen enrichment.   Forest Ecology and Management  275:52-59.

21. Huth, T, J.*, S. Porder, J. Chaves and J. H. Whiteside (2012).  Soil carbon and nutrient changes associated with deforestation for pasture in Southern Costa Rica.   Biotropica 44(5): 661-667  DOI 10.1111/j.1744-7429.2012.00863.x

20. Porder, S, Lipson, D.*** and Harrison, R. (2012).  Carbon stock changes in soil and aboveground biomass from house lot development in King County, Washington, USA.  Open Journal of Forestry DOI: 10.4236/ojf.2012.21001

19. Cleveland, C., A. Townsend, P. Taylor, S. Alvarez-Claire, M. Bustamante, G. Chuyong, P. Grierson, K.Harmes, B. Houlton, A. Marklein, W. Parton, S. Porder, S. Reed,, W. Silver, E. Tanner, and W. Wieder (2011).  Revisiting nutrient limitation in tropical forests:  the importance of nitrogen-phosphorus interactions.  Ecology Letters doi: 10.1111/j.1461-0248.2011.01658.x.  

18. Hayhoe, S.J.*, C. Neill, S. Porder, R. McHomey, P. Lefebvre, M.T. Coe, H. Elsenbeer and A.V. Krusche (2011).  Conversion to soy on the Amazonian agricultural frontier increases streamflow without affecting stormflow dynamics.  Global Change Biology doi: 10.1111/j.1365-2486.2011.02392.x.

17. Porder, S. and G.E. Hilley (2011).  Linking chronosequences with the rest of the world – predicting soil phosphorus content in eroding landscapes. Biogeochemistry
102:153-166.  doi: 10.1007/s10533-010-9428-3.

16. Townsend, A.R. and S. Porder (2011).  Boundary Issues.  Environmental Research Letters 6 doi:10.1088/1748-9326/6/1/011001 (Invited perspective).

15. Peltzer, D.A., D.A. Wardle, V.J. Allison, T.W. Baisden, R.D. Bardgett, O.A. Chadwick, L.M. Condron, R.L. Parfitt, S. Porder, S.J. Richardson, B.L. Turner, P.M. Vitousek, J. Walker and L.R. Walker (2010).  Understanding ecosystem retrogression.  Ecological Monographs 80:509-529.  doi:10.1890/09-1552.1.  

14. Hilley, G.E., C.P. Chamberlain, S.G. Moon, S. Porder and S.D. Willett (2010).  Competition between erosion and reaction kinetics in controlling silicate weathering rates.  Earth and Planetary Science Letters doi:10.1016/j.epsl.2010.01.008.

13. Vitousek, P.M., S. Porder, B.Z. Houlton and O.A. Chadwick. (2010).  Terrestrial phosphorus limitation: mechanisms, implications, and nitrogen-phosphorus interactions.  Ecological Applications 20(1): 5-15.

12. McAlpine, L.* and S. Porder (2009). Evaluation of a large-scale invasive plant species herbicide control program in the Berkshire Taconic Plateau, Massachusetts, USA.
Conservation Evidence 6: 117-123.

11. Palmer, M., M. Graves , T. Ladefoged , O.A. Chadwick , K. Duarte , S. Porder, P.M. Vitousek (2009). Sources of Nutrients to Windward Agricultural Systems in Pre-contact Hawai`i. 
Ecological Applications 19(6) 1444-1453.  

10. Porder, S. and O.A. Chadwick (2009).  Climate and soil-age constraints on nutrient uplift and retention by plants. Ecology 90 (3): 623-636.

9. Hilley, G.E. and S. Porder (2008).  A framework for predicting global silicate weathering and CO2 drawdown rates over geologic time.  Proceedings of the National Academy of Sciences 105(44) 16855-16859 (doi/10.1073/pnas.0801462105)

8. Bern, C.R., S.Porder and A.R. Townsend. (2007).  Erosion and landscape development decouple strontium and sulfur in the transition to dominance by atmospheric inputs. Geoderma 142: 274-284.

7. Porder, S., O.A. Chadwick and G.E. Hilley (2007).  Chemical weathering, mass loss and dust inputs across a climate by time matrix in the Hawaiian IslandsEarth and Planetary Science Letters 258: 414-427. 

6. Porder, S.,  P.M. Vitousek, O.A. Chadwick, C.P. Chamberlain and G.E. Hilley.  (2007). Uplift, erosion, and phosphorus limitation in terrestrial ecosystems. Ecosystems 10: 158-170.

5. Porder, S., D.B. Clark, and P.M. Vitousek (2006).  Persistence of rock-derived nutrients in the wet tropical forests of La Selva, Costa Rica. Ecology 87: 594-602.

4. Porder, S., G.P. Asner., and P.M. Vitousek (2005).  Ground-based and remotely-sensed nutrient availability across a tropical landscape Proceedings of the National Academy of Sciences 102: 10909 – 10912.

3. Porder, S., A. Paytan, and P.M. Vitousek (2005).  Erosion and landscape development affect plant nutrient status in the Hawaiian IslandsOecologia 142: 440 – 449.

2. Vitousek, P., Chadwick, O., Matson, P., Allison, S., Derry, L., Kettley, L., Luers, A., Mecking, E., Monastra, V., and S.Porder.  (2003)  Erosion and the rejuvenation of weathering-derived nutrient supply in an old tropical landscape. Ecosystems 6: 762-772.

1: Porder, S., Paytan, A. and E.A. Hadly (2003).  Mapping the origin of faunal assemblages using strontium isotopes. Paleobiology 29 (2): 197-204.

Peer-reviewed book chapters

Porder, S., A. Bento, A. Leip, L.A. Martinelli, J. Samseth, T. Simpson. 2009. “Toward an integrated assessment of biofuel technologies.” Pages 227 – 242 in R.W. Howarth and S. Bringezu (eds) Biofuels: Environmental Consequences and Interactions with Changing Land Use. Proceedings of the Scientific Committee on Problems of the Environment (SCOPE) International Biofuels Project Rapid Assessment, 22-25 September 2008, Gummersbach Germany.  Cornell University, Ithaca NY, USA. (

Non-refereed journal articles

K.M.A. Chan, P.A.T. Higgins and S. Porder (2005).  Protecting science from abuse requires a broader form of outreach.  Public Library of Science 3 (7) e218.

Porder, S., K.M.A. Chan and P.A.T. Higgins (2004).  Scientists must conquer the reluctance to speak out.  Nature 431: p1046. (not peer reviewed)

Chan, KMA, S. Porder and P.A.T. Higgins (2004)  Concern is more than just ‘ruffled feathers’ – If a government abuses science to justify its policies, scientists have a duty to speak out.  Nature 428: p255. (not peer reviewed)

Porder, S. (2004) Science and policy – Uneasy partners.  Bioscience 54(1) 6-7.

Popular Press

Fox-Kemper, B and Porder, S. EPA mutes science. Providence Journal Oct. 27, 2017

Porder, S. World Changers 3.0. Natural History Magazine

Porder, S. Remove your furnace and stay warm. Providence Journal Mar. 8, 2015

Porder, S. The tired arguments of warming deniers. Providence Journal Mar 9, 2014

Porder, S. Iowa in the Amazon. NY Times Nov 25, 2013

** post doctoral advisee

* graduate advisee

*** undergraduate advisee