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Andre Velescu

Dipl. Geogr. Andre Velescu

Research, Teaching, Head of Laboratory
Group: Soil
Room: 703.1/3 in Geb. 10.50
Phone: +49 721 608-41622
Fax: +49 721 608-43738
andre velescuCto1∂kit edu

Karlsruher Institut für Technologie (KIT)
Institut für Geographie und Geoökologie
Reinhard-Baumeister-Platz 1
76131 Karlsruhe
Germany 



Andre Velescu

Biogeochemistry, Element cycling, Soil chemistry, Soil physics, Ecosystem research, Soil and water analysis

Topics

  • Element cycles and nutrient input in a tropical montane forest in the Andes of South Ecuador
  • Nutrient manipulation experiments in ecosystem research
  • Tracer experiments with 15N isotopes to study the fate and transformation processes of Nitrogen in ecosystems
  • Monitoring of environmental field parameters using automatic data collection



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Curriculum Vitae

Since 2015 Research assistant and head of the laboratory at the Institute of Geography and Geoecology of the Karlsruhe Institute of Technology, Geomorphology and Soil Science Group.
Since 2011 PhD position at the Institute of Geography of the University of Bern, Soil Science Group. Title of the Dissertation: „Response of element cycles to increased nutrient input in a tropical montane rain forest in South Ecuador“.
2009-2010 Research assistant at the Institute of Geography of the Eberhard Karls University of Tübingen, Chair of Physical Geography.
2002-2009 Study of Geography, Geology and Geochemistry at the Eberhard Karls University of Tübingen. Title of the Diploma thesis: “Heterogeneity of soil factors in the humid-tropical mountainous landscape of the Río Huehuetán catchment (Chiapas, Mexico)”.

Projects

Since 2018 Nutrient supply as driver of biomass production and associated ecosystem water fluxes along a land-use and climate gradient (DFG, WI 1601/26-1). The project is part of the DFG Research Unit 2730 - Environmental changes in biodiversity hotspot ecosystems of South Ecuador: response and feedback effects (RESPECT). www.tropicalmountainforest.org
2014-2017 Nutrient cycles and their response to climate change in a tropical montane rain forest in the Andes of South Ecuador. Associate project of the Research Platform DFG PAK 823-825: Platform for Biodiversity, Ecosystem Monitoring and Research in South Ecuador. www.tropicalmountainforest.org
2011–2013 Response of element cycles in a tropical mountain rain forest to environmental and land-use change. Project of the Research Unit DFG FOR 816: Biodiversity and Sustainable Management of a Megadiverse Mountain Ecosystem in South Ecuador. www.tropicalmountainforest.org
2011–2013 Effects of plant diversity on the soil nutrient cycle. Project of the Swiss National Science Foundation (SNF) within the framework of the DFG Research Unit FOR 1451: Exploring mechanisms underlying the relationship between biodiversity and ecosystem functioning. www.jena-experiment.de
2007–2009 Investigation of water resources in the catchment of the Río Huehuetán, Chiapas, Mexico. Research project of the Mexican Water Commission (CONAGUA), México D.F., Mexico.

Presentations

 

Oral presentations

Velescu, A., Bigalke, M., Boy, J., Valarezo, C., Wilcke, W. (2018): Biological vs. abiotic control of base metal budgets in a tropical montane forest in South Ecuador. Annual Conference of the Society for Tropical Ecology, 26.-30. March 2018, Paris.

Fabian, T., Velescu, A., Wilcke, W. (2018): Sodium retention in the canopy of a tropical montane forest in South Ecuador. Annual Conference of the Society for Tropical Ecology, 26.-30. March 2018, Paris.

Velescu, A., Leimer, S., Willimann, E., Trachte, K., Peters, T., Rollenbeck, R., Bendix, J., Wilcke, W. (2016): Response of element budgets of a tropical montane forest to climate change and nitrogen deposition. Annual Conference of the Society for Tropical Ecology, 23.-26. April 2016, Göttingen.

Leimer, S., Velescu, A., Peña Herrera, J.M., Emck, P., Peters, T., Rollenbeck, R., Trachte, K., Bendix, J., Wilcke, W. (2015): Biogeochemical and biological responses of a tropical montane ecosystem in Ecuador to environmental change. Conference of the German Society of Soil Science, 5.-10. September 2015, München.

Bandowe, B.A.M., Meusel, H., Leimer, S., Velescu, A., Strecker, T., Oelmann, Y., Eisenhauer, N., Scheu, S., Hoffmann, T., Wilcke, W. (2015): The effect of plant diversity on polycyclic aromatic hydrocarbons (PAHs) and their derivatives in soils: Results from the Jena Experiment. Conference of the German Society of Soil Science, 5.-10. September 2015, München.

Velescu, A., Homeier, J., Wilcke, W. (2015): Response of dissolved organic matter in ecosystem solutions to moderate N, P and N+P additions to a tropical montane forest in southern Ecuador. Annual Conference of the Society for Tropical Ecology, 7.-10. April 2015, Zürich.

Velescu, A., Homeier, J., Wilcke, W. (2014): Low-level N, P and N+P amendments to a tropical montane forest in Ecuador: Response of C and N cycles during the first five years. Annual Conference of the Society for Tropical Ecology, 24.-28. February 2014, Freising.

Camenzind, T., Donnellan Barraclough, A.M., Gensing, A., Hempel, S., Hertel, D., Homeier, J., Velescu, A., Rillig, M.C. (2013): Arbuscular mycorrhizal abundance and community structure observed in a tropical montane forest in response to nutrient additions. Annual Conference of the Society for Ecology, 9.-13. September 2013, Potsdam.

Velescu, A., Valarezo, C., Wilcke, W. (2012): Biogeochemical responses to increasing N deposition in a tropical mountain forest in southern Ecuador. Annual Conference of the Society for Tropical Ecology, 20.-24. February 2012, Erlangen.

 

Poster

 

Fabian, T., Velescu, A., Camenzind, T., Wilcke, W., Rillig, M.C. (2017): Sodium in a tropical montane forest in South Ecuador: demand of phyllosphere microorganisms and effects on decomposition. Conference of the German Society of Soil Science, 3.-6. September 2017, Göttingen.

Velescu, A., Fabian, T., Wilcke, W. (2016): Nutrient availability drives dissolved organic matter cycling in a tropical montane forest of Ecuador. Annual Conference of the Society for Tropical Ecology, 23.-26. April 2016, Göttingen.

Fabian, T., Velescu, A., Camenzind, T., Wilcke, W., Rillig, M.C. (2016): Sodium shortage increases Na retention in the phyllosphere and affects decomposition processes in a tropical montane forest in South Ecuador. Annual Conference of the Society for Tropical Ecology, 23.-26. April 2016, Göttingen.

Leimer, S., Velescu, A., Valarezo, C., Wilcke, W. (2015): 17 years of biogeochemical data from a remote tropical montane forest in Ecuador: Tracing changes in the N cycle under environmental change. General Assembly of the European Geoscience Union, 12-17. April 2015, Wien.

Velescu, A., Camenzind, T., Herpich, L., Wilcke, W., Rillig, M.C. (2015): Do fungi need salt licks? Sodium shortage in tropical forests affects decomposition processes. Annual Conference of the Society for Tropical Ecology, 7.-10. April 2015, Zürich.

Camenzind, T., Hempel, S.,  Hertel, D., Homeier, J., Horn, S., Olsson, P.A., Velescu, A., Wilcke, W., Rillig, M.C. (2014): Nitrogen and phosphorus additions impact arbuscular mycorrhizal abundance and molecular diversity in a tropical montane forest in southern Ecuador. New Phytologist Symposium, 14.-16. Mai 2014, Zürich.

Velescu, A., Oelmann, Y., Wilcke, W. (2011): Ein 15N-Tracer-Experiment zur Aufklärung des  Zusammenhangs zwischen Pflanzendiversität und Stickstoffumsatzraten in einem experimentellen Grünlandökosystem (Poster). Conference of the German Society of Soil Science, 3.-9. September 2011. Berlin and Potsdam.

Publications

Contributions in peer-reviewed journals
2019Bandowe, B. A. M., Leimer, S., Meusel, H., Velescu, A., Dassen, S., Eisenhauer, N., Hoffmann, T., Oelmann, Y., Wilcke, W. (2019): Plant diversity enhances the natural attenuation of polycyclic aromatic compounds (PAHs and oxygenated PAHs) in grassland soils. Soil Biology and Biochemistry 129, pp. 60–70. 10.1016/j.soilbio.2018.10.017

Wilcke, W., Velescu, A., Leimer, S., Bigalke, M., Boy, J., Valarezo, C. (2019): Temporal trends of phosphorus cycling in a tropical montane forest in Ecuador during 14 years. Journal of Geophysical Research: Biogeosciences 124, pp. 1329–1386. 10.1029/2018JG004942

2017Wilcke, W., Velescu, A., Leimer, S., Bigalke, M., Boy, J., Valarezo, C. (2017): Biological vs. geochemical control and environmental change drivers of the base metal budgets of a tropical montane forest in Ecuador during 15 years. Biogeochemistry 136, pp. 167–189. 10.1007/s10533-017-0386-x

2016Velescu, A., Valarezo, C., Wilcke, W. (2016): Response of dissolved carbon and nitrogen concentrations to moderate nutrient additions in a tropical montane forest of south Ecuador. Frontiers in Earth Science 4, pp. 58. Unter den Bedingungen von Open Access verfügbar 10.3389/feart.2016.00058

2014Camenzind, T., Hempel, S., Homeier, J., Horn, S., Velescu, A., Wilcke, W., Rillig, M. C. (2014): Nitrogen and phosphorus additions impact arbuscular mycorrhizal abundance and molecular diversity in a tropical montane forest. Global Change Biology 20, pp. 3646–3659. 10.1111/gcb.12618

2010Velescu, A., Meßmer, T., Scholten, T., Kühn, P. (2010): Removal of short-range order minerals prior to grain size analysis of volcanic ash soils. Journal of Plant Nutrition and Soil Science 173, pp. 799–804. 10.1002/jpln.201000111

Contributions in journals and series (not peer-reviewed)
2015Fabian, T., Velescu, A., Wilcke, W. (2015): Canopy Organisms Retain Sodium in the Tropical Montane Forest. Tabebuia Bulletin (2015), DFG Research PAK 823-825 4, pp. 14f. Unter den Bedingungen von Open Access verfügbar 10.5678/lcrs/pak823-825.cit.1412

Velescu, A., Wilcke, W. (2015): Increased nitrogen and phosphorus availability stimulates the mineralization of dissolved organic matter in the tropical montane forest of South Ecuador. Tabebuia Bulletin (2015), DFG Research PAK 823-825 3, pp. 12f. Unter den Bedingungen von Open Access verfügbar 10.5678/lcrs/pak823-825.cit.1399

2012Velescu, A., Valarezo, C., Wilcke, W. (2012): Response of the forest to elevated nitrogen deposition. TMF Newsletter of the DFG Research Unit 816 16, pp. 12. Unter den Bedingungen von Open Access verfügbar 10.5678/lcrs/for816.cit.1081

Book chapters
2016Velescu, A., Wilcke, W. (2016): Rising Nitrogen Inputs to the Tropical Mountain Rain Forests. pp. 80–85. In: Beck, E. (ed.): Biodiversity Hotspot Tropical Mountain Rainforest. Naturaleza y Cultura Internacional, Loja, Ecuador.