Stream Biofilm and Biogeochemistry Lab


Dept. of Limnology and Bio-Oceanography | University of Vienna

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TEAM MEMBERS

Faculty
    Jakob Schelker
Lab-Technician based at WCL Lunz
    Gertraud Steniczka
PhD-Students
    Kyle Boodoo
    Robert Niederdorfer
Post-Docs
    Elisabet Ejarque González
    Katharina Besemer
Students and Former Members
    Current MSc and BSc Students
    Former Lab Members



Dr. Jakob Schelker

Junior Research Group Leader

jakob_schelker_1My research interest lies in the biogeochemical cycling of carbon, nutrients and heavy metals in fluvial ecosystems. I am particularly interested in (i) how and when these solutes are mobilized from the terrestrial to the aquatic environment and (ii) how they are processed and cycled within the fluvial network. Our recent work covers a broad range of spatio-temporal scales; studies reach from understanding diurnal solute variation in single stream reaches, to studying biofilm growth in experimental flumes as well as to decadal-scale assessments of nutrient and carbon dynamics in fluvial networks.

The ultimate aim of this research is to find parsimonious, process-based model conceptualizations that can be tested as specific hypotheses. If consolidated, they may be used for scaling to spatio-temporal scales where measurements are not feasible. They may also be applied to evaluate risks for the functioning and health of stream ecosystems that originate from anthropogenic perturbations, such as climate and/or land-use change.

Positions and Education:

  • Since 01-2015: Junior Research Group Leader, University of Vienna, Austria
  • Since 11-2013: Universitätsassistent, University of Vienna, Austria
  • 2013: PhD in Soil Science, Swedish University of Agricultural Sciences (SLU), Umeå, Sweden
  • 2008: Diplom (MSc) in Hydrology, University of Freiburg, Germany

Contact:jakob_schelker_2

Dr. Dipl.-Hyd. Jakob Schelker
Dept. of Limnology & Bio-Oceanography
University of Vienna,
Althanstrasse 14
1090 Vienna, Austria
email: jakob.schelker(ã)univie.ac.at
phone: (+43) 660 321 5081
Please also see my co-affiliation at the WasserCluster Lunz

Teaching:

Please see the 'Teaching and Theses' section of our website.

Selected publications (5):

  • Schelker, J., G. A. Singer, A. J. Ulseth, S. Hengsberger, and T. J. Battin (2016). CO2 evasion from a steep, high gradient stream network: importance of seasonal and diurnal variation in aquatic pCO2 and gas transfer. Limnol. Oceanogr. in press. doi:10.1002/lno.10339
  • Schelker, J., Sponseller, R., Ring, E., Högbom, L., Löfgren, S., and Laudon, H. (2016): Nitrogen export from a boreal stream network following forest harvesting: seasonal nitrate removal and conservative export of organic forms, Biogeosciences, doi:10.5194/bg-13-1-2016.
  • Fasching, C., Ulseth, A. J., Schelker, J., Steniczka, G. and Battin, T. J. (2015), Hydrology controls dissolved organic matter export and composition in an Alpine stream and its hyporheic zone. Limnology & Oceanography. doi:10.1002/lno.10232
  • Eklöf K, Kraus A, Futter M, Schelker J, Meili M, Boyer EW, Bishop K (2015) Parsimonious Model for Simulating Total Mercury and Methylmercury in Boreal Streams Based on Riparian Flow Paths and Seasonality. Environmental Science & Technology, 49, 7851-7859.
  • Schelker, J., Eklöf, K., Bishop, K. and Laudon, H. (2012). Effects of forestry operations on dissolved organic carbon concentrations and export in boreal first-order streams. Journal of Geophysical Research, doi:10.1029/2011JG001827

Please also see my full publication record and my google scholar profile for a summary of all pubs.

Conferences & Academic Service:

  • I am regularly performing journal reviews. Past reviews included the following journals: 'Aquatic Sciences', 'Biogeochemistry', 'Biogeosciences', 'Environmental Science & Technology', 'Forest Ecology and Management', ‘Global Change Biology’, 'Hydrology and Earth System Sciences', ‘Hydrological Processes’, ‘Journal of Environmental Management’, ‘Journal of Hydrology’, 'Limnology and Oceanography', ‘Science of the Total Environment’ and 'Water Resources Research'.
  • I served as a member of a PhD-thesis evaluation committee at the Faculty of Ecology, University of Barcelona, Spain, November 2014.
  • Talks at major international conferences (AGU, EGU, ASLO, ICMGP); at workshops / summer schools, as well as other research institutions and universities (CRP Gabriel Lippman, Luxembourg; USGS Water Science Center, New York, USA; IGB Berlin, Germany; etc.).

 

Full list of peer-reviewed publications:

Published Journal Articles:

  • Schelker, J., G. A. Singer, A. J. Ulseth, S. Hengsberger, and T. J. Battin (2016). CO2 evasion from a steep, high gradient stream network: importance of seasonal and diurnal variation in aquatic pCO2 and gas transfer. Limnol. Oceanogr. in press. doi:10.1002/lno.10339
  • Schelker, J., Sponseller, R., Ring, E., Högbom, L., Löfgren, S., and Laudon, H. (2016): Nitrogen export from a boreal stream network following forest harvesting: seasonal nitrate removal and conservative export of organic forms, Biogeosciences, 13, 1-12, doi:10.5194/bg-13-1-2016.
  • Fasching, C., Ulseth, A. J., Schelker, J., Steniczka, G. and Battin, T. J. (2015), Hydrology controls dissolved organic matter export and composition in an Alpine stream and its hyporheic zone. Limnol. Oceanogr.. doi:10.1002/lno.10232
  • Oni, S. K., T. Tiwari, J. L. J. Ledesma, A. M. Ågren, C. Teutschbein, J. Schelker, H. Laudon, and M. N. Futter (2015), Local and landscape-scale impacts of clear-cuts and climate change on surface water dissolved organic carbon in boreal forests, J. Geophys. Res. Biogeosci., 120, doi:10.1002/2015JG003190
  • Eklöf K, Kraus A, Futter M, Schelker J, Meili M, Boyer EW, Bishop K (2015) Parsimonious Model for Simulating Total Mercury and Methylmercury in Boreal Streams Based on Riparian Flow Paths and Seasonality. Environmental Science & Technology, 49, 7851-7859. http://pubs.acs.org/doi/abs/10.1021/acs.est.5b00852
  • Eklöf K, Schelker J, Sørensen R, Meili M, Laudon H, Von Brömssen C, Bishop K (2014) Impact of Forestry on Total and Methyl-Mercury in Surface Waters: Distinguishing Effects of Logging and Site Preparation. Environmental Science & Technology, 48, 4690-4698. http://pubs.acs.org/doi/abs/10.1021/es404879p
  • Schelker, J., Öhman K., Löfgren S. & Laudon H. (2014). Scaling of increased dissolved organic carbon inputs by forest clear-cutting – What arrives downstream? J. Hydrol., 508, 299-306. http://www.sciencedirect.com/science/article/pii/S0022169413008202
  • Schelker, J., Grabs, T., Bishop, K., Laudon, H. (2013). Drivers of increased organic carbon concentrations in stream water following forest disturbance: Separating effects of changes in flow-pathways and soil warming. Journal of Geophysical Research 118. link: http://onlinelibrary.wiley.com/doi/10.1002/2013JG002309/abstract
  • Burns, D.A., Aiken, G.R., Bradley, P.M., Journey, C.A. and Schelker, J. (2013). Specific ultra-violet absorbance as an indicator of mercury sources in an Adirondack River basin. Biogeochemistry, 1-16. http://www.springerlink.com/content/m18310uq1tqu84r6/.
  • Schelker, J., Kuglerová, L., Eklöf, K., Bishop, K. and Laudon, H. (2013). Hydrological effects of clear-cutting in a boreal forest – Snowpack dynamics, snowmelt and streamflow responses. Journal of Hydrology 484(0), 105-114, http://dx.doi.org/10.1016/j.jhydrol.2013.01.015.
  • Schelker, J., Eklöf, K., Bishop, K. and Laudon, H. (2012). Effects of forestry operations on dissolved organic carbon concentrations and export in boreal first-order streams. Journal of Geophysical Research 117(G1), G01011. http://onlinelibrary.wiley.com/doi/10.1029/2011JG001827/abstract
  • Schelker, J., D. A. Burns, M. Weiler, and H. Laudon (2011). Hydrological mobilization of mercury and dissolved organic carbon in a snow-dominated, forested watershed: Conceptualization and modeling. Journal of Geophysical Research 116 (G1), G01002. http://onlinelibrary.wiley.com/doi/10.1029/2010JG001330/abstract
  • Laudon, H., J. Hedtjärn, J. Schelker, K. Bishop, R. Sørensen, and A. Ågren. 2009. Response of dissolved organic carbon following forest harvesting in a boreal forest. Ambio 38:381–386. http://www.bioone.org/doi/abs/10.1579/0044-7447-38.7.381

Other:

  • Schelker, J. (2013). Forestry impact on water quality: a landscape perspective on dissolved organic carbon. Dissertation (summary) Umeå: Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880; 2013:38, ISBN 978-91-576-7815-7. Availiable Online: http://pub.epsilon.slu.se/10346/ (open access).