Research Interests: Aquatic Ecology, Community Ecology and Biodiversity, Experimental Ecology, Paleoecology, Catchment-Sea Interactions

 for further information: ae-ims.metu.edu.tr

Education

  • Ph.D. 2013, Ecoinformatics and Biodiversity, Aarhus University, Denmark
  • M.Sc. 2008, Limnology, Middle East Technical University, TÜRKİYE
  • B.Sc. 2005, Biology, Middle East Technical University, TÜRKİYE

Career Highlights

  • Led > 5 ecosystem experiments. Conducted > 24-months fieldwork in inland & coastal lakes, coastal seas in Arctic&Antarctic, Turkish, Danish, Greenlandic, Black Sea and Mediterranean.
  • Co-authored > 50 manuscripts and > 150 presentations
  • PI of > 15 projects and researcher in > 20 projects
  • Supervising (-ed) > 4 PostDocs, > 4 PhD, > 12 MSc and > 30 undergraduate students
  • Recipient of TÜBA GEBİP award
  • Scuba diver, birdwatcher and nature photographer.

Selected Publications

  1. Fu, H., Özkan, K., Johansson, L. S., Søndergaard, M., Lauridsen, T. L., Yuan, G., & Jeppesen, E. (2024). Causal feedback loops modify lake chlorophyll a–nutrient relationships over two decades of nutrient reductions and climate warming. Limnology and Oceanography, 69(10), 2294-2306.
  2. Özkan, K., Korkmaz, M., Amorim, C. A., Yılmaz, G., Koru, M., Can, Y., ... & Jeppesen, E. (2023). Mesocosm design and implementation of two synchronized case study experiments to determine the impacts of salinization and climate change on the structure and functioning of shallow lakes. Water, 15(14), 2611.
  3. Fu, H., Yuan, G., Özkan, K., Johansson, L. S., Søndergaard, M., Lauridsen, T. L., & Jeppesen, E. (2020). Patterns of Seasonal Stability of Lake Phytoplankton Mediated by Resource and Grazer Control During Two Decades of Re-oligotrophication. Ecosystems, 1-15.
  4. Özkan K, Jeppsesen E, Bjerring RB, Johansson LS, Davidson TA, Søndergaard M, Lauridsen TL,  Svenning JC. 2016. Long-term trends and temporal synchrony in lake plankton richness, diversity  and biomass driven by re-oligotrophication and climate across 17 Danish Lakes. Water. 8, 427.
  5. Özkan K, Jeppsesen E, Davidson TA, Søndergaard M, Lauridsen TL, Bjerring RB, Johansson LS, Svenning JC. 2014. Cross-taxon congruence in lake plankton largely independent of environmental gradients. Ecology. 95, 2778-2788.
  6. Özkan K, Svenning JC, Jeppsesen E. 2013. Environmental species sorting dominates forest-bird community assembly across scales. Journal of Animal Ecology. 82, 266-274.
  7. Özkan K, Jeppesen E, Søndergaard M, Lauridsen TL, Liboriussen L, Svenning JC. 2013. Contrasting roles of water chemistry, lake morphology, land-use, climate and spatial processes in driving phytoplankton richness in the Danish landscape. Hydrobiologia. 710, 173-187. 
  8. Özkan K, Jeppesen E, Johansson LS, Beklioglu M. 2010. The response of periphyton and submerged macrophytes to nitrogen and phosphorus loadings in warm lakes: a mesocosm experiment. Freshwater Biology, 55, 463-475.