John T. Van Stan, II, Ph.D.

Phone: 912-478-8040


Twitter: @Prof_Van_Stan

Address: 1113 Herty Building, Statesboro, GA


  • Ph.D. Geography, Univ. of Delaware, 2012
  • M.S. Geography, Univ. of Delaware, 2009
  • M.S. Environmental Sci. & Policy, Johns Hopkins, 2007
  • B.A. English Literature, Univ. of Delaware, 2006
  • B.S. Environmental Sci., Univ. of Delaware, 2005

About me

My research seeks to enhance our understanding of the interface between forest hydrological processes and ecosystem functioning, as this is critical to the advancement of natural resource & watershed management. I primarily perform field-based investigations of forest ecohydrological processes, focused in 3 areas:

(1) Biogeochemical dynamics of dissolved organic matter and ionic nutrients from tree canopies,

(2) Forest hydrological processes and their effects on forest ecology, and

(3) Instrumentation/methods development for researching biomechanical interactions between forests and reliant ecologies.

Although my main research site is located in coastal Georgia (USA), I have also collaborated with scientists in Switzerland, Germany, Panama, Iran, Maryland, Colorado and Washington State to investigate the interactions between forests and their environment. These experiences provide unique data sets for inclusion in classroom activities and opportunities for engaging students in collaborative, international research. When not researching or teaching, you can usually find me jogging and kayaking with my wife, Stefanie, and sons, Beck & Levi.

Current research projects

  • Influence of arboreal epiphytes on precipitation water and nutrient cycling by forest canopies.
  • Alteration of forest ecohydrological processes by urbanization and urban greening.
  • Connections between canopy rainfall partitioning and soil physicochemistry and microbial communities.

Peer-reviewed publications (student coauthors*)

Links to each publication have been provided in the doi hyperlink at the end of each citation.

  • 2018, P. Porada, J.T. Van Stan, A. Kleidon. Significant contribution of non-vascular vegetation to global rainfall interception. Nature Geoscience, 11: 563-567, doi: 10.1038/s41561-018-0176-7. Supported by US-NSF EAR-1518726.
  • 2018, J.T. Van Stan, S.J. Underwood, J. Friesen. Urban Forestry: An underutilized tool in water management. Chapter 2 in: Advances in Chemical Pollution, Environmental Management and Protection: Advanced Tools for Integrated Water Resources Management. Supported by US-NSF EAR-1518726.
  • 2018, J.T. Van Stan, A. Stubbins. Tree-DOM: Dissolved organic matter in throughfall and stemflow. Limnology & Oceanography Letters special issue on Carbon Cycling in Inland Waters (Eds. E.H. Stanley & P.A. del Giorgio), 3: 199-214. doi: 10.1002/lol2.10059. Supported by US-NSF EAR-1518726.
  • 2018, J.T. Van Stan, D.A. Gordon*. Mini-review: Stemflow as a resource limitation to near-stem soils. Frontiers in Plant Science, 9: 248. doi: 10.3389/fpls.2018.00248. Supported by US-NSF EAR-1518726.
  • 2018, T. Bittar, P. Pound*, A. Whitetree*, L.D. Moore*, J.T. Van Stan. Estimation of throughfall and stemflow bacterial flux in a subtropical oak-cedar forest. Geophysical Research Letters, 45: 1410-1418, doi: 10.1002/2017GL075827. Supported by US-NSF EAR-1518726 and DGE-0841146.
  • 2018, M. Teachey, P. Pound*, E. Ottesen, J.T. Van Stan. Bacterial community composition of throughfall and stemflow. Frontiers in Forests and Global Change, in press.
  • 2018, D.H. Howard*, J.T. Van Stan, A. Whitetree*, L. Zhu, A. Stubbins. Interstorm variability in the biolability of tree-derived dissolved organic matter (Tree-DOM) in throughfall and stemflow. Forests special issue on Carbon, Nitrogen and Phosphorus Cycling in Forest Soils (Ed. R.G. Qualls), 9: 236. doi: 10.3390/f9050236. Supported by US-NSF EAR-1518726 and the Georgia Southern University College Office of Undergraduate Research.
  • 2018, S.M.M. Sadeghi*, J.T. Van Stan, T.G. Pypker, J. Tamjidi, J. Friesen, M. Farahnaklangroudi. Importance of transitional leaf states in canopy rainfall partitioning dynamics. European Journal of Forest Research, doi: 10.1007/s10342-017-1098-4.
  • 2018, J. Friesen, J.T. Van Stan, S. Elleuche. Communication science through comics: A method. Publications, 6: 38, doi: 10.3390/publications6030038.
  • 2018, L. Hakimi, S.M.M. Sadeghi*, J.T. Van Stan, T.G. Pypker, E. Khosropour. Management of pomegranate (Punica granatum) orchards alters the supply and pathway of rain water reaching soils in an arid agricultural landscape. Agriculture, Ecosystems and Environment, 259: 77-85, doi: 10.1016/j.agee.2018.03.001.
  • 2018, P. Attarod, Q. Tang, J.T. Van Stan, X. Liu. National assessment of throughfall sensitivity to changes in storm magnitude for the forests of Iran. Forest Systems, 27: e019, doi: 10.5424/fs/2018273-13857.
  • 2017, J.T. Van Stan, S. Wagner, F. Guillemette, A. Whitetree*, J. Lewis*, L. Silva, A. Stubbins. Temporal dynamics in the concentration, flux, and optical properties of tree-derived dissolved organic matter (tree-DOM) in an epiphyte-laden oak-cedar forest. Journal of Geophysical Research - Biogeosciences, 122: 2982-2997, doi: 10.1002/2017JG004111. Supported by US-NSF EAR-1518726 and EF-1340764.
  • 2017, J.T. Van Stan, A.M.J. Coenders-Gerrits, M. Dibble*, P. Bogeholz*, Z. Norman*. Effects of phenology and meteorological disturbance on litter rainfall interception for a Pinus elliottii stand in the Southeastern US. Hydrological Processes, 31: 3719-3728, doi: 10.1002/hyp.11292. Supported by US-NSF EAR-1518726 and Georgia EPD-WQ-5419.
  • 2017, J.T. Van Stan, Z. Norman*, A. Meghoo*, J. Friesen, A. Hildebrandt, J.-F. Côté, S.J. Underwood, G. Maldonado. Edge-to-stem variability in wet-canopy evaporation from an urban tree row. Boundary-Layer Meteorology, 165: 295-310, doi: 10.1007/s10546-017-0277-7. Supported by US-NSF EAR-1518726 and Georgia EPD-WQ-5419.
  • 2017, S.M.M. Sadeghi*, J.T. Van Stan, T.G. Pypker, J. Friesen. Canopy hydrometeorological dynamics across a chronosequence of a globally invasive species, Ailanthus altissima (Mill., tree of heaven). Agricultural and Forest Meteorology, 240-241: 10-17, doi: 10.1016/j.agrformet.2017.03.017.
  • 2017, E.D. Gutmann, J.T. Van Stan, J. Friesen, D.P. Aubrey, J. Lundquist. Observed compression of in situ tree stems during freezing. Agricultural and Forest Meteorology, 243: 19-24, doi: 10.1016/j.agrformet.2017.05.004. Supported by US-NSF CBET-0931780 and the NCAR Visiting Scientist Program.
  • 2017, T.G. Pypker, M.H. Unsworth, J.T. Van Stan, B.J. Bond. The absorption and evaporation of water vapor by epiphytes in an old-growth Douglas-fir forest during the seasonal summer dry season: Implications for the canopy energy budget. Ecohydrology, 10: e1801, doi: 10.1002/eco.1801. H.J. Andrews Experimental Forest LTER is supported by US-NSF DEB-1440409.
  • 2017, A. Stubbins, L.M. Silva, T. Dittmar, J.T. Van Stan. Molecular and optical properties of tree-derived dissolved organic matter in throughfall and stemflow from live oaks and eastern red cedar. Frontiers in Earth Science, 5: 22, doi: 10.3389/feart.2017.00022. Supported by US-NSF EAR-1518726.
  • 2017, C.M. Siegert, D.F. Levia, D.J. Leathers, J.T. Van Stan, M.J. Mitchell. Do storm synoptic patterns affect biogeochemical fluxes from temperate deciduous forest canopies? Biogeochemistry, 132: 273-292, doi: 10.1007/s10533-017-0300-6. Supported by US-NSF EAR-0809205, BCS-1233592, BCS-1003047.
  • 2017, S.P. Yanoviak, C. Silveri, A.Y. Stark, J.T. Van Stan, D.F. Levia. Surface roughness affects the running speed of tropical canopy ants. Biotropica, 49: 92-100, doi: 10.1111/btp.12349. Supported by US-NSF DEB-1252614 and the Starrett Foundation.
  • 2016, J.T. Van Stan, T.E. Gay*, E.S. Lewis*. Use of Multiple Correspondence Analysis (MCA) to identify interactive meteorological conditions affecting relative throughfall. Journal of Hydrology, 533: 452-460, doi: 10.1016/j.hydrol.2015.12.039.
  • 2016, J.T. Van Stan, E.D. Gutmann, E.S. Lewis*, T.E. Gay*. Modeling rainfall interception loss for an epiphyte-laden Quercus virginiana forest using reformulated static and variable storage Gash analytical models. Journal of Hydrometeorology, 17: 1985-1997, doi: 10.1175/JHM-D-16-0046.1. Supported by the NCAR visiting scientist program.
  • 2016, J.T Van Stan, E.S. Lewis*, A. Hildebrandt, C. Rebmann, J. Friesen. Impact of interacting bark structure and rainfall conditions on stemflow variability in a temperate beech-oak forest, Central Germany. Hydrological Sciences Journal, 61: 2071-2083, doi: 10.1080/02626667.2015.1083104. Supported by DAAD A/12/72418.
  • 2016, J.T. Van Stan. Hydrology. In Oxford Bibliographies in Geography (Ed., B. Warf). New York, USA: Oxford University Press, doi: 10.1093/OBO/9780199874002-0119.
  • 2016, L.D. Moore*, J.T. Van Stan, T.E. Gay*, C.L. Rosier, T. Wu. Alteration of soil chitinolytic bacterial and ammonia oxidizing archaeal community diversity by rainwater redistribution in an epiphyte-laden Quercus virginiana canopy. Soil Biology and Biochemistry, 100: 33-41, doi: 10.1016/j.soilbio.2016.05.016. Supported by US-NSF DGE-0841146.
  • 2016, C.L. Rosier, D.F. Levia, J.T. Van Stan, A. Aufdenkampe, J. Kan. Seasonal dynamics of soil microbial community structure within the proximal area of tree boles: possible influence of stemflow. European Journal of Soil Biology, 73: 108-118, doi: 10.1016/j.ejsobi.2016.02.003. Supported by US-NSF EAR-0724971.
  • 2016, S.M.M. Sadeghi*, P. Attarod, J.T. Van Stan, T.G. Pypker. The importance of considering rainfall partitioning in afforestation initiatives in semiarid climates: A comparison of common planted tree species in Tehran, Iran. Science of the Total Environment special issue on Environmental & Socio-Economic Methodologies & Solutions Towards Integrated Water Resources Management, 568: 845-855, doi: 10.1016/j.scitotenv.2016.06.048.
  • 2015, J.T. Van Stan, T.G. Pypker. A review and evaluation of forest canopy epiphyte roles in the partitioning and chemical alteration of precipitation. Science of the Total Environment, 536: 813-824, doi: 10.1016/j.scitotenv.2015.07.134.
  • 2015, J.T. Van Stan, A. Stubbins, T. Bittar, J.S. Reichard, K.A. Wright, R.B. Jenkins*. Tillandsia usneoides (L.) L. (Spanish moss) water storage and leachate characteristics from two maritime oak forest settings. Ecohydrology, 8: 988-1004, doi: 10.1002/eco.1549. Supported by US-NSF OCE-1234704, DEB-1146161.
  • 2015, J.T. Van Stan, D.F. Levia, R.B. Jenkins*. Forest canopy interception loss across temporal scales: implications for urban greening initiatives. The Professional Geographer, 67: 41-51, doi: 10.1080/00330124.2014.888628. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2015, T.E. Gay*, J.T. Van Stan, L.D. Moore*, E.S. Lewis*, J.S. Reichard. Throughfall alterations by degree of Tillandsia usneoides cover in a southeastern US Quercus virginiana forest. Canadian Journal of Forest Research, 45: 1688-1698, doi: 10.1139/cjfr-2015-0233.
  • 2015, C. Rosier, J.T. Van Stan, L.D. Moore*, J.O.S. Schrom*, T. Wu, J.S. Reichard, J. Kan. Forest canopy structural controls over throughfall affect soil microbial community structure in an epiphyte-laden maritime oak stand. Ecohydrology, 8: 1459-1470, doi: 10.1002/eco.1595. Supported by US-NSF EAR-0724971.
  • 2015, J. Friesen, J. Lundquist, J.T. Van Stan. Evolution of forest precipitation water storage measurement methods. Hydrological Processes, 29: 2504-2520, doi: 10.1002/hyp.10376. Supported by DAAD A/12/72418.
  • 2015, S.M.M. Sadeghi, P. Attarod, J.T. Van Stan, T.G. Pypker, D. Dunkerley. Efficiency of the reformulated Gash's interception model in semi-arid afforestations. Agricultural and Forest Meteorology, 201: 76-85, doi: 10.1016/j.agformet.2014.10.006.
  • 2015, C. Rosier, L.D. Moore*, T. Wu, J.T. Van Stan. Forest canopy precipitation partitioning: An important plant trait influencing the spatial structure of the symbiotic soil microbial community. Chapter 10. In: Plant Microbe Interactions. Advances in Botanical Research No. 75. H. Bais and J. Sherrier (Eds.), Oxford, England: Elsevier, doi: 10.1016/bs.abr.2015.09.005. Supported by US-NSF EAR-0724971.
  • 2015, D.F. Levia, A.N. Shiklomanov, J.T. Van Stan, C.E. Scheick*, S.P. Inamdar, M.J. Mitchell, P.J. McHale. Calcium and aluminum cycling in a temperate broadleaved deciduous forest of the eastern United States: relative impacts of tree species, canopy state, and flux type. Environmental Monitoring & Assessment, 187: 458, doi: 10.1007/s10661-015-4675-3. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2015, P. Abbasian, P. Attarod, S.M.M. Sadeghi*, J.T. Van Stan, S.M. Hojjati. Throughfall nutrients in a degraded indigenous Fagus orientalis forest and a Picea abies plantation in the North of Iran. Forest Systems, 24: e035, doi: 10.5424/fs/2015243-06764.
  • 2014, J.T. Van Stan, J.H. Van Stan, D.F. Levia. Meteorological influences on stemflow generation across diameter size classes of two morphologically distinct deciduous species. International Journal of Biometeorology, 58: 2059-2069, doi: 10.1007/s00484-014-0807-7.
  • 2014, D. Legates, D.F. Levia, J.T. Van Stan, M. Velasco. Using wavelet analysis to examine bark microrelief. Trees - Structure and Function, 28: 413-425, doi: 10.1007/s00468-013-0959-9. Supported by the Starrett Foundation.
  • 2013, J.T. Van Stan, K.A. Martin, J. Friesen, M.T. Jarvis, J.D. Lundquist, D.F. Levia. Evaluation of an instrumental method to reduce error in canopy water storage estimates via mechanical displacement. Water Resources Research, 49: 54-63, doi: 10.1029/2012WR012666. Supported by US-NSF EAR-0724971, CBET-0931780.
  • 2013, K.A. Martin, J.T. Van Stan, S.E. Dickerson-Lange, J.A. Lutz, J.W. Berman, R. Gersonde, J.D. Lundquist. Development and testing of a snow interceptometer to quantify canopy water storage and interception processes in the rain/snow transition zone of the North Cascades, Washington, USA. Water Resources Research, 49: 3242-3256, doi: 10.1002/wrcr.20271. Supported by US-NSF CBET-0931780.
  • 2013, S.P. Inamdar, G. Dhillon, S. Singh, S. Dutta, D.F. Levia, D. Scott, M.J. Mitchell, J.T. Van Stan, P. McHale. Temporal variation in end-member chemistry and its influence on runoff mixing patterns in a forested, Piedmont catchment. Water Resources Research, 49: 1828-1844, doi: 10.1002/wrcr.20158. Supported by US-NSF EAR-0809205.
  • 2012, J.T. Van Stan, D.F. Levia, S.P. Inamdar, M. Lepori-Bui*, M.J. Mitchell. The effects of phenoseason and storm characteristics on throughfall solute washoff and leaching dynamics from a temperate deciduous forest canopy. Science of the Total Environment 430: 48-58, doi: 10.1016/j.scitotenv.2012.04.060. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2012, J.T. Van Stan. Controls and dynamics of canopy-derived dissolved organic matter from co-dominant broadleaved deciduous canopies to the soil of a temperate catchment in the northeastern United States. Publications in Climatology 64: 1-96. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2012, D.F. Levia, J.T. Van Stan, S.P. Inamdar, M.T. Jarvis, M.J. Mitchell, S.M. Mage*, C.E. Scheick*, P.J. McHale. Stemflow and dissolved organic carbon cycling: temporal variability in concentration, flux, and UV-vis spectral metrics in a temperate broadleaved deciduous forest in the eastern USA. Canadian Journal of Forest Research 42: 207-216, doi: 10.1139/x11-173. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2011, J.T. Van Stan, M.T. Jarvis, D.F. Levia, J. Friesen. Technical note: Instrumental method for reducing error in compression-derived measurements of rainfall interception for individual trees. Hydrological Sciences Journal 56: 1061-1066, doi: 10.1080/02626667.2011.590811. Supported by Penn State CZO International Student Travel Award, the TERENO initiative, and the Starrett Foundation.
  • 2011, J.T. Van Stan, C.M. Siegert, D.F. Levia, C.E. Scheick*. Effects of wind-driven rainfall on stemflow generation between two codominant tree species with differing crown characteristics. Agricultural and Forest Meteorology 151: 1277-1286, doi: 10.1016/j.agrformet.2011.05.008. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2011, S-I. Onodera, J.T. Van Stan. Effect of forest fires on hydrology and biogeochemistry of watersheds. Chapter 30. In: Forest Hydrology and Biogeochemistry: Synthesis of Past Research and Future Directions. Ecological Studies Series No. 216. Levia, D.F., Carlyle-Moses, D.E. and Tanaka, T. (Eds.), Heidelberg, Germany: Springer-Verlag, doi: 10.1007/978-94-007-1363-5_30.
  • 2011, D.F. Levia, J.T. Van Stan, C.M. Siegert, S.P. Inamdar, M.J. Mitchell, S.M. Mage*, P.J. McHale. Atmospheric deposition and corresponding variability of stemflow chemistry across temporal scales in a mid-Atlantic broadleaved deciduous forest canopy. Atmospheric Environment 45: 3046-3054, doi: 10.1016/j.atmosenv.2011.03.022. Supported by US-NSF EAR-0809205, BCS-1003047.
  • 2011, T.G. Pypker, D.F. Levia, J. Staelens, J.T. Van Stan. Canopy structure in relation to hydrological and biogeochemical fluxes. Chapter 18. In: Forest Hydrology and Biogeochemistry: Synthesis of Past Research and Future Directions. Ecological Studies Series No. 216. Levia, D.F., Carlyle-Moses, D.E. and Tanaka, T. (Eds.), Heidelberg, Germany: Springer-Verlag, doi: 10.1007/978-94-007-1363-5_18.
  • 2010, J.T. Van Stan, D.F. Levia. Inter- and intraspecific variation in stemflow production for Fagus grandifolia and Liriodendron tulipifera in the northeastern United States. Ecohydrology 3: 11-19, doi: 10.1002/eco.83.
  • 2010, J.T. Van Stan, M.T. Jarvis, D.F. Levia. An automated instrument for the quantification of bark microrelief. IEEE Transactions on Instrumentation and Measurement 59: 491-493, doi: 10.1109/TIM.2009.2031338. Supported by the Starrett Foundation.
  • 2010, D.F. Levia, J.T. Van Stan, S.M Mage*, P.K. Hauske. Spatio-temporal variability of stemflow volume in a beech-yellow poplar forest in relation to tree species and size. Journal of Hydrology 380: 112-120, doi:10.1016/j.jhydrol.2009.10.028. Supported by US-NSF EAR-0809205.