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Dr. Oksana Buzhdygan


AG Tietjen - Theoretische Ökologie

Institut für Biologie

Freie Universität Berlin


Freie Universität Berlin
Institut für Biologie
Königin-Luise-Straße 2/4, Gartenhaus
14195 Berlin

Research Interests

  • Impacts of environmental changes on biodiversity and ecosystem functioning
  • Relationships between biodiversity, community structure, and ecosystem functioning in multitrophic systems
  • Multitrophic interactions, energy flow, and nutrient cycle in food webs
  • Ecological Network Analysis


Curriculum Vitae

  • since 2021: Senior scientist, Theoretical Ecology, Freie Universität Berlin
  • 2017-2021: Parental leave and independent researcher, associated to Freie Universität Berlin and the University of Nis
  • 2015-2017: Post-Doc (with Jana Petermann and Britta Tietjen), Theoretical Ecology, Freie Universität Berlin
  • 2013-2015: Post-Doc (with Jana Petermann), Multitrophic Biodiversity, Freie Universität Berlin
  • 2010-2012: Post-Doc fellowship (with Bernard C. Patten), Odum School of Ecology, University of Georgia, USA
  • 2007-2014: Teaching and different research positions (with interruptions), Department of Ecology and Biomonitoring, Chernivtsi National University
  • 2000-2008: BSc (ecology), MSc (ecology and environmental protection), PhD (ecology), Chernivtsi National University


siehe englische Website

Peer review

  • Petermann J.S., Buzhdygan, O.Y. (2021) Grassland biodiversity. Current Biology, 31(19), R1195-R1201. https://doi.org/10.1016/j.cub.2021.06.060

  • Buzhdygan, O.Y., Stojković Piperac M., Stamenković O., Čerba D., Ostojić A., Tietjen B., Milošević D. (2021) Human impact induces shifts in trophic composition and diversity of consumer communities in small freshwater ecosystems. In: Pešić V., Miliša M., Milošević D. (Eds), Small Water Bodies of the Western Balkan. Springer Nature, "Water" Edition, in press.
  • Stamenković O., Simić V., Stojković Piperac M., Milošević D., Simić V., Ostojić A., Đorđević N., Čerba D., Petrović A., Jenačković D., Đurđević A., Koh M., Buzhdygan O.Y. (2021) Direct, water-chemistry mediated and cascading effects of human-impact intensification on multitrophic biodiversity in ponds. Aquatic Ecology 55, 187–214. https://doi.org/10.1007/s10452-020-09822-5
  • Buzhdygan, O.Y., Meyer, S.T., Weisser, W.W., Eisenhauer, N., Ebeling, A., Borrett, S.R., Buchmann, N., Cortois, R., Deyn, G.B. De, Kroon, H. de, Gleixner, G., Hertzog, L.R., Hines, J., Lange, M., Mommer, L., Ravenek, J., Scherber, C., Scherer-Lorenzen, M., Scheu, S., Schmid, B., Steinauer, K., Strecker, T., Tietjen, B., Vogel, A., Weigelt, A., Petermann, J.S. (2020) Biodiversity increases multitrophic energy use efficiency, flow, and storage in grasslands. Nature Ecology and Evolution 4, 393–405. https://doi.org/10.1038/s41559-020-1123-8
  • Buzhdygan, O.Y., Tietjen, B., Rudenko, S.S, Nikorych, V.A., Petermann, J. (2020) Direct and indirect effects of land-use intensity on plant communities across elevation in semi-natural grasslands. PLos ONE, 15 (11), e0231122. https://doi.org/10.1371/journal.pone.0231122
  • Khudr, M.S., Fliegner, L., Buzhdygan, O.Y., Wurst S. (2020) Super-predation in a multi-predator-one-prey system alter the abundance and behaviour of green peach aphid. The Canadian Entomologist, 152(2). 200-223. https://doi.org/10.4039/tce.2020.7
  • Stamenković, O., Piperac, M.S., Milošević, D., Buzhdygan, O.Y., Petrović, A., et. al. (2019) Anthropogenic pressure explains variations in the biodiversity of pond communities along environmental gradients: a case study in south-eastern Serbia. Hydrobiologia, 838(1), 65-83. https://doi.org/10.1007/s10750-019-03978-4
  • Khudr, M.S., Buzhdygan, O.Y., Petermann, J.S. & Wurst, S. (2017) Fear of predation alters clone-specific performance in phloem-feeding prey. Scientific Reports 7, 7695. https://doi.org/10.1038/s41598-017-07723-6
  • Buzhdygan, O.Y., Rudenko, S.S., Kazanci, C., & Patten, B.C. (2016) Effect of invasive black locust (Robinia pseudoacacia L.) on nitrogen cycle in floodplain ecosystem. Ecological Modelling, 319, 170–177. https://doi.org/10.1016/j.ecolmodel.2015.07.025
  • Buzhdygan O.Y., Rudenko S.S. (2016) Multivariate comparison of trophic networks of grassland ecosystems. Ecology and Noospherology 27 (1-2), 49–71. doi:10.15421/031606. https://en.dp.ua/index.php/en/article/view/30
  • Buzhdygan O.Y., Rudenko S.S. (2016) Trophic network assessment of grassland ecosystem status. Biological Systems 8(1), 143–154. http://ibhb.chnu.edu.ua/uploads/files/vb/T8_V1_2016/23_Buzhdygan.pdf
  • Buzhdygan O.Y., Baglei O.V. (2016) Developmental traits in grassland and agricultural plants under the influence of ragweed. Biological Systems 8(2), 202–207. http://ibhb.chnu.edu.ua/uploads/files/vb/BS_T8_V2_2016/8_Buzhdygan.pdf
  • Buzhdygan, O.Y., Rudenko, S.S., Kostyshyn, S.S. (2015). Habitat conditions that drive plant traits in grasslands: phytoindicative analytical approach. Ecology and Noospherology, 26 (1-2), 74–80. https://doi.org/10.15421/031508
  • Buzhdygan, O.Y., Rudenko, S.S., Patten, B.C., & Kostyshyn, S.S. (2014) Food-web topology of Ukrainian mountain grasslands: Comparative properties and relations to ecosystem parameters. Ecological Modelling, 293, 128-138. https://doi.org/10.1016/j.ecolmodel.2014.05.003
  • Buzhdygan, O.Y., Patten, B.C., Kazanci, C., Ma, Q., Rudenko, S.S. (2012) Dynamical and system-wide properties of linear flow-quantified food webs. Ecological Modelling245, 176-184.   https://doi.org/10.1016/j.ecolmodel.2012.02.024
  • Buzhdygan, O.Y., Patten, B.C., Rudenko, S.S. (2012) Trophic network analysis: comparison of system-wide properties. In: Jordán, F., Jørgensen, S.E. (Eds), Models of the Ecological Hierarchy: From Molecules to the Ecosphere. Oxford, UK: Elsevier, 181–199. https://doi.org/10.1016/B978-0-444-59396-2.00012-2



  • Khudr, M.S., Fliegner, L., Buzhdygan, O.Y., Purkiss, S.A. Host Availability, Repulsive Companion Planting, and Predation Interact and Shape How a Parthenogenetic Aphid Population Responds to a Stratified Ecological Challenge. Preprints 2020010140 v1. doi: 10.20944/preprints202001.0140.v1
  • Khudr M.S., Dobberke T., Buzhdygan O.Y., Wurst S. Live and inanimate predator-associated cues suppress the population of sap-feeding prey and induce polyphenism. bioRxiv https://doi.org/10.1101/2019.12.27.889634


  • Buzhdygan, O.Y., Meyer, S.T., Weisser, W.W., Eisenhauer, N., Ebeling, A., Borrett, S.R., Buchmann, N., Cortois, R., Deyn, G.B. De, Kroon, H. de, Gleixner, G., Hertzog, L.R., Hines, J., Lange, M., Mommer, L., Ravenek, J., Scherber, C., Scherer-Lorenzen, M., Scheu, S., Schmid, B., Steinauer, K., Strecker, T., Tietjen, B., Vogel, A., Weigelt, A., Petermann, J.S. (2020) Multitrophic energy dynamics (energy-use efficiency, energy flow, and energy storage) in the Jena Experiment (Main Experiment). PANGAEA https://doi.org/10.1594/PANGAEA.910659
  • Buzhdygan, O.Y., Rudenko, S.S. (2020) Plant communities, grazing intensity, soil properties and decomposers in grasslands across elevation in the Eastern Carpathians in Ukraine. Dryad https://doi.org/10.5061/dryad.n8pk0p2rx

Conferences (selected):

  • Buzhdygan O.Y., Petermann J.S. (2016): Effect of plant diversity loss on ecosystem functioning: trophic network analysis of experimental grasslands. Ecological Modelling Global Conference 2016. 8–12 May 2016, Towson, Baltimore, USA
  • Buzhdygan O.Y., Petermann J.S. (2015): Plant biodiversity affects whole-ecosystem functioning in grassland trophic networks. British Ecological Society Annual Meeting. 13–16 December 2015, Edinburgh, Scotland
  • Khudr M.S., Buzhdygan O.Y. (2015): On the ecology of fear: biological control of four aphid genotypes under the different types of exposure to natural enemy. Plants and People (P&P) Conference 2015: Future plan[t]s. Max Planck Institute of Molecular Plant Physiology. September 7-9, 2015, Potsdam, Germany.
  • Buzhdygan O.Y., Petermann J.S. (2015): Biodiversity loss and ecosystem functioning: a trophic network approach. 45th Annual Meeting of the Ecological Society of Germany, Austria and Switzerland. August 31 - September 4, 2015, Göttingen, Germany. p. 413-414.
  • Buzhdygan O.Y., Petermann J.S. (2015): Understanding the Consequences of Biodiversity Loss for Ecosystem Functioning: Integration of Quantitative System Modeling of Trophic Networks and Experimental Long-Term Data. Innovations in Collaborative Modeling. Addressing complex social and environmental problems through systems modeling techniques. June 4-5, 2015. East Lansing, Michigan, USA, p. 7.
  • Buzhdygan O.Y. (2014): Food webs of pastoral ecosystems: complexity and size. 8th European Conference on Ecological Modelling Marrakech, MOROCCO - October 27-30, 2014, p. 15.
  • Buzhdygan O.Y. (2014): Multitrophic biodiversity research: effect of plant biodiversity loss on ecosystem functions. DCPS-Tag 2014. Dahlem Centre of Plant Sciences of Freie Universität Berlin, Germany, June 5, 2014.
  • Buzhdygan O.Y. Petermann J. (2014): Effect of biodiversity loss on dynamics of the grassland trophic networks. Jena Experiment Retreat-2014, Jena, Germany, March 18-19, 2014.
  • Buzhdygan O.Y., Patten B.C., Rudenko S.S. (2013): Network Properties of Pastoral Food Webs in Ukraine. Symposium in Honor of Bernard C. Patten "Systems Ecology: A Network Perspective & Retrospective" at Athens, GA, USA, April 2013.
  • Buzhdygan O.Y. (2013): Pastoral degradation of grassland phytocoenoses in Southwest of Ukraine. Materials of VI International conference of young scientists “Biodiversity. Ecology. Adaptation. Evolution” at Odessa, Ukraine, May 2013, 61-62.
  • Buzhdygan O.Y., Patten B.C. (2012): Relationships between food-web measures and indirect effects. International EcoSummit 2012 “Ecological Sustainability Restoring the Planet's Ecosystem Services” at Columbus, Ohio, USA, September – October 2012.
  • Buzhdygan O.Y., Patten B.C., Rudenko S.S. (2011): Trophic Network Analysis: Assessing the System-Wide Properties of Pastoral Ecosystems. 7th ECEM (European Conference on Ecological Modelling) 2011 at Riva del Garda, Italy, May-June 2011, pp. 44-45.
  • Buzhdygan O.Y., Rudenko S.S., Patten B.C. (2011): Adjacency Network Analysis: Assessing the Stability of Pastoral Ecosystems. Institute of Biological Engineering 16-th Annual Conference 2011 (Session: Ecological & Environmental Engineering – Complexity and System Issues) at Atlanta, GA, USA, March 2011, IBE Abstract 57, pp. 90-91.

Press releases on our research:

Fressen und gefressen werden.


Biodiversity increases the efficiency of energy use in grasslands. Eat or be eaten.


Eat and be eaten.


Biodiversity increases the efficiency of energy use in grasslands.