Research interests  
My research interest is in understanding of how human activities and environmental factors affect composition, diversity, and functioning within different trophic levels of ecosystem and across the entire multitrophic community. I believe it is important to bring together the System Modelling and Assessment approaches and empirically derived ecosystem measurements in order to enhance our understanding on the complexity of real-world multitrophic ecosystems.   
ORCID iD:    
Peer-reviewed publications:
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. In Press. DOI: 10.1038/s41559-020-1123-8
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. In Press.
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. DOI: 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, (2017). DOI: 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. DOI: 10.1016/j.ecolmodel.2015.07.025
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. DOI: 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 Modelling 245, pp. 176-184.   DOI: 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, pp. 181–199. DOI: 10.1016/B978-0-444-59396-2.00012-2
in Ukrainian International journals:
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) 
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. DOI: 10.31861/biosystems2016.02.202
Buzhdygan, O. Y., Rudenko, S. S. (2016). Trophic Network Assessment of grassland ecosystem status. Biological Systems 8(1), pp. 143-154. DOI: 10.31861/biosystems2016.01.143
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. DOI: 10.15421/031508  
Khudr, M.S., Fliegner ‎, L., Buzhdygan, O.Y., Purkiss, S.A. (2020) Host Availability, Repulsive Companion Planting, and Predation Interact and Shape How a Parthenogenetic Aphid Population Responds to a Stratified Ecological Challenge. Preprints (doi:10.20944/preprints202001.0140.v1)
Khudr M.S., Dobberke T., Buzhdygan O.Y., Wurst S. (2019). Live and inanimate predator-associated cues suppress the population of sap-feeding prey and induce polyphenism bioRxiv 2019.12.27.889634; (doi:10.1101/2019.12.27.889634)  
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. (2013): Phytoindicative assessment of grassland communities of Pastoral ecosystems. International conference of young scientists “Biodiversity and wildlife conservation ecological issues” at Tsaghkadzor-Yerevan, Armenia, May 2013, 71-75. 
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.