Research Team
P Czortek

Patryk Czortek

Job position :
Assistant Professor
Phone number:
Academic degrees
  • Doctorate: 2018, Faculty of Biology, University of Warsaw, “Changes in vegetation of the Tatry Mountains related to climate change and change in land use”
  • Master’s degree: 2012, Faculty of Natural Sciences, Kazimierz Wielki University in Bydgoszcz, “The diversity of the Wda Valley flora in terms of habitat conditions and forms of anthropopressure”
  • Bachelor’s degree: 2010, Faculty of Natural Sciences, Kazimierz Wielki University in Bydgoszcz, “Characteristics of the Wda River valley flora near Świecie”
Scientific interests

My research interests include the ecology of vascular plants in various types of ecosystems, with particular emphasis on natural (e.g. alpine and forest) as well as anthropogenically transformed (e.g. urban, ruderal and segetal) ecosystems. In my research work, I attempt to assess the impact of biotic and abiotic environmental factors on changes in the taxonomic and functional diversity of ecosystems and to learn about the mechanisms shaping the coexistence of species in environmental gradients. Among the environmental factors whose impact on biodiversity is taken into account in my research, climate warming, urbanization, biological invasions, as well as changes in the type of land use in terms of time and space occupy take a special place.

  • 2014-2017, Pol-Nor/196829/87/2013, KlimaVeg: The impact of climate change on species ranges and composition of plant communities in temperate, boreal and alpine regions, Norway Financial Mechanism; project executor
Latest publications
  • Puchałka R., Klisz M., Koniakin S., Czortek P., Dylewski Ł., Paź-Dyderska S., Vítková M., Sádlo J., Rašomavičius V., Čarni A., De Sanctis M., Dyderski M.K. 2022. Citizen science helps predictions of climate change impact on flowering phenology: A study on Anemone nemorosa. Agricultural and Forest Meteorology 325, 109133. DOI: 10.1016/j.agrformet.2022.109133
  • Urlich W., Matthews T.J., Biurrun I., Campos J.A., Czortek P., Dembicz I., Essl F., Filibeck G., Guisso del Galdo G.-P., Güler B., Naqinezhad P., Dengler J. 2022. Environmental drivers and spatial scaling of species abundance distributions in Palearctic grassland vegetation. Ecology 103: e3725. DOI: 10.1002/ecy.3725 
  • Czortek P., Borkowska L., Lembicz M. 2021. Long-term shifts in the functional diversity of abandoned wet meadows: Impacts of historical disturbance and successional pathways. Ecology and Evolution 11(21):15030-15046. DOI: 10.1002/ece3.8186
  • Czortek P., Orczewska A., Dyderski M.K. 2021. Niche differentiation, competition or habitat filtering? Mechanisms explaining co‐occurrence of plant species on wet meadows of high conservation value. Journal of Vegetation Science 32,1: e12983. DOI: 10.1111/jvs.12983
  • Łubek A., Kukwa M., Jaroszewicz B., Czortek P. 2021. Composition and specialization of the lichen functional traits in a Primeval Forest – Does ecosystem organization level matters? Forests 12: 485. DOI: 10.3390/f12040485
  • Łubek A., Kukwa M., Jaroszewicz B., Czortek P. 2021. Shifts in lichen species and functional diversity in primeval forest ecosystem as a response to environmental changes. Forests 12, 686. DOI: 10.3390/f12060686
  • Pielech R., Czortek P. 2021. Disentangling effects of disturbance severity and frequency: Does bioindication really work? Ecology and Evolution 11,1: 252-262. DOI: 10.1002/ece3.7019
  • Zhang J., Gillet F., Bartha S., Alatalo J.M., Biurrun I., Dembicz I., Grytnes J.-A., Jaunatre R., Pielech R., Van Meerbeek K., Vynokurov D., Widmer S., Aleksanyan A., Bhatta K.P., Campos J.A., Czortek P., Dolezal J., Essl F., García-Mijangos I., Guarino R., Güler B., Hájek M., Kuzemko A., Li F.Y., Löbel S., Moradi H., Naqinezhad A., Silva V., Šmerdová E., Sonkoly J., Stifter S., Talebi A., Török P., White H., Wu J., Dengler J. 2021. Scale dependence of species-area relationships is widespread but generally weak in Palaearctic grasslands. Journal of Vegetation Science 32: e13044  DOI: 10.1111/jvs.13044
  • Czeszczewik D., Czortek P., Jaroszewicz B., Zub K., Rowiński P., Walankiewicz W. 2020. Climate change has cascading effects on tree masting and the breeding performance of a forest songbird in a primeval forest. Science of the Total Environment 142084. DOI: 10.1016/j.scitotenv.2020.142084
  • Czortek P., Delimat A., Dyderski M.K., Zięba A., Jagodziński A.M., Jaroszewicz B. 2020. Population and community-level compositional patterns shape realized niche of the rare arctic-alpine species Carex lachenalii Schkuhr. Nordic Journal of Botany 38,5.  DOI: 10.1111/njb.02522

All publications

Participation in conferences, symposia and scientific seminars
  • Czortek P., Kukwa M., Jaroszewicz B., Łubek A. “Lichen hosts or microhabitats – factors determining diversity of lichenicolous fungi in the Białowieża Primeval Forest”. Międzynarodowa konferencja naukowa “Forests at risk: Białowieża and beyond”, Warszawa-Białowieża, 12-15.02.2019. Oral presentation
  • Orczewska A., Czortek P., Jaroszewicz B., Kantor A. “Is salvage logging a proper tool for restoration of forest ecosystems effected by bark beetle outbreak?”. Międzynarodowa konferencja naukowa „5th European Congress of Conservation Biology”, Jyväskylä, Finlandia, 12-15.06.2018. Oral presentation
  • Czortek, P., Delimat, A., Dyderski, M.K., Zięba, A., Jagodziński, A.M., Jaroszewicz, B. „Competition and tourism drive trade-off between vegetative and generative reproduction of rare mountain species Carex lachenalii Schkuhr”. Ogólnopolska Konferencja Użytkowników R, Warszawa, 27-29.09.2017. Poster
  • Orczewska A., Czortek P. “The impact of salvage logging after bark beetle outbreak on the herb layer composition and forest natural values. A Białowieża Forest case”. Międzynarodowa konferencja naukowa „2nd International Conference on Forests: Temperate and Boreal Forest Conservation in a rapidly changing world – New scientific findings and implications for future management, Neuschönau, Niemcy, 26-29.04.2017. Oral presentation
  • Czortek, P., Kapfer, J., Ratyńska, H., Eycott, A., Delimat, A., Zięba, A., Orczewska, A., Grytnes, J.-A., Jaroszewicz, B. „Long-term plant species composition shifts in Rybi Potok Valley and Morskie Oko Lake Region (High Tatra Mts) as a response to changes in environment”. Międzynarodowa Konferencja Naukowa „Impact of climate change on the ranges of species and species composition of plant communities”, Chęciny, 24-26.01.2017. Oral presentation
  • Czortek, P., Eycott, A.E., Grytnes, J.-A., Kapfer, J., Delimat, A., Jaroszewicz, B. “Climate change drives plant species composition shift in the flora of the Tatry Moutains summits over past 100 years”. Międzynarodowa Konferencja Naukowa “Impact of climate change and pollution on vegetation distribution and condition in the temperate, boreal, alpine and polar zones”, Warszawa 26-27.10.2016. Oral presentation
  • Eycott, A.E., Czortek, P., Grytnes, J.-A., Zięba, A, Delimat, A., Kapfer, J., Jaroszewicz, B. “Grazing abandonment drives community compositional shift in the Tatras mountains over the past 90 years”. Międzynarodowa Konferencja Naukowa “Nordic Oikos Conference”, Turku, Finlandia 02-04.02.2016. Poster
  • Czortek, P., Grytnes, J.-A., Delimat, A., Jaroszewicz, B. “Impact of tourism and cessation of grazing on changes in the flora of summits in the Tatra Mountains”. Międzynarodowa Konferencja Naukowa “IAVS – Annual Symposium of the International Association for Vegetation Science: Understanding broad-scale vegetation changes”, Brno, Republika Czeska 19-24.07.2015. Poster
Courses at the University of Warsaw
  • Ecology and Environmental Protection (lecture)
  • Field Ecology (class)
  • Dendrology (class)
  • Functioning of Nature and Ecosystem Services (class)
  • Informatics (class)
Training courses
Membership, awards, distinctions


  • 2020, Individual award of the Rector of the University of Warsaw for scientific achievements
  • 2020, 2019, 2018, Team award (Jaroszewicz B., Czortek P.) award of the Rector of the University of Warsaw for scientific achievements


  • 2017, Congratulatory diploma of the Rector of the University of Warsaw for scientific achievements
Participation in editorial boards
Outreach activities
  • 2017-present Licensed guide in the area of the Białowieża National Park