Centrum Algatech

Mikrobiologický ústav AV ČR, v.v.i. - vědecké pracoviště Třeboň

Research interest

My main scientific interest is trophic relationships between aquatic microorganisms. Aquatic microorganisms - bacteria, algae and heterotrophic protists – are the key players in energy transfer and element cycling in all freshwater and marine habitats. These processes are vital for sustaining aquatic ecosystem and the entire biosphere. Most of the energy transfer and element cycling is maintained through the food webs. Therefore, the elucidating the relationships in microbial food webs is crucial to comprehend the functioning of aquatic habitats. My research include investigation of diversity, distribution, dynamics and activity of bacteria, algae and heterotrophic protists in their natural environments.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     


2015-present: Junior researcher, Institute of Microbiology, Czech Academy of Sciences, Laboratory of Anoxygenic Phototrophs

2010-2015: Junior researcher (since September 2014: Deputy Department Head) at National Marine Fisheries Research Institute, Poland

2009: Research assistant, Institute of Oceanology of the Polish Academy of Sciences, Poland

2009: Research assistant, Limnological Station of the University of Zurich, Switzerland

2006-2009: PhD degree in Marine Microbiology, Institute of Oceanology of the Polish Academy of Sciences/ Limnological Station of the University of Zurich, Poland/Switzerland

2004-2006: Master degree in Marine Microbiology, International Max Planck Research School of Marine Microbiology/Alfred Wegener Institute for Polar and Marine Research, Germany

1999-2004: Master degree in Marine Biology, University of Gdansk/Institute of Oceanology of the Polish Academy of Sciences, Poland


Current PI project:

AAPs rule! Aerobic anoxygenic phototrophs: their role in carbon utilization under light in freshwater ecosystems. Founded by the GAČR, project no. 18-14095Y                                                                                 


Past PI projects :

Factors regulating the phototrophic activity of freshwater community of Betaproteobacteria (2015-2017), in cooperation with the Biologické centrum AV ČR, v.v.i. (co-PI), Founded by the GAČR, project no. 15-12197S
DEMONA (2012-2015) ‘Diversity and Ecology of Mixotrophic Nanoflagellates in the Gulf of Gdańsk,’ in cooperation with the University of Zurich (CH), Founded under the framework of Polish-Swiss Research Programme.
CBOL (2010-2014) ‘Seasonal Differences in Diversity of Bacteria, and Picoand Nanoplanktonic Protists in Three Zones of the Vistula River Estuary,’ in cooperation with the University of Bangor (UK) and Nicolai Copernicus University in Toruń (PL). Founded by the NSC Poland.
Impact of Heterotrophic and Mixotrophic Nanoflagellates on Bacterial Assemblages in the Gulf of Gdańsk (2007-2008), in cooperation with the University of Zurich. Founded by the NSC Poland.


Awards and fellowships

EMBL Advanced Training Centre Corporate Partnership Programme Fellowship (2016)
EMBL Advanced Training Centre Corporate Partnership Programme Fellowship (2015)
FEMS stipend for young researchers (2015)
Award of the NMFRI Director for the publications record in 2014
Scholarship of the Director of the Institute of Baltic Sea Research, Warnemünde (2014)
Award of the NMFRI Director for the publications record in 2013.
Multiple Scholarships from Foundation for Hydrobiology & Limnology Switzerland (2007-2008)
Scholarship from the University of Zurich, Department of International Affairs (2008)
Gordon Research Conference travel award (2004)



Piwosz K, Shabarova T, Pernthaler J, Posch T, Šimek K, Porcal P,  Salcher MM (2020) Bacterial and Eukaryotic Small-Subunit Amplicon Data Do Not Provide a Quantitative Picture of Microbial Communities, but They Are Reliable in the Context of Ecological Interpretations. mSphere  5(2) e00052-20

Kolesár Fecskeová L, Piwosz K, Hanusová M, Nedoma J, Znachor P, Koblížek M (2019) Diel changes and diversity of pufM expression in freshwater communities of anoxygenic phototrophic bacteria. Scientific Reports 9, 18766.

Piwosz K (2019) Weekly dynamics of abundance and size structure of specific nanophytoplankton lineages in coastal waters (Baltic Sea). Limnology and Oceanography 64(5), 2172-2186

Kolářová E, Medová H, Piwosz K, Koblížek M (2019) Seasonal dynamics of aerobic anoxygenic phototrophs in freshwater lake Vlkov. Folia Microbiologica 64(5), 705-710

Piwosz K, Shabarova T, Tomasch, Simek K, Kopejtka K, Kahl S, Pieper DH, Koblizek M (2018) Determining lineage-specific bacterial growth curves with a novel approach based on amplicon reads normalization using internal standard (ARNIS). ISME J 12(11): 2640

Piwosz K, Całkiewicz J, Gołębiewski M, Creer S (2018) Diversity and community composition of pico- and nanoplanktonic protists in the Vistula River estuary (Gulf of Gdansk, Baltic Sea). Estuar Coast Shelf Sci 207: 242

Piwosz K, Kaftan D, Dean J, Šetlík J, Koblížek M (2018) Non-linear effect of irradiance on photoheterotrophic activity and growth of the aerobic anoxygenic phototrophic bacterium Dinoroseobacter shibae. Envir Microbiol 20(2): 724

Kasalický V, Zeng Y, Piwosz K, Šimek K, Kratochvilová H, Koblížek M (2018) Common presence of aerobic anoxygenic photosynthesis within the genus Limnohabitans. Appl Envir Microbiol 84(1): UNSP e02116-17

Gołębiewski M, Całkiewicz J, Creer S, Piwosz K (2017) Tideless estuaries in brackish seas as a possible freshwater- marine transition zones for bacteria – the case study of the Vistula river estuary. Envir Microbiol Rep 9:129

Medlin LK, Piwosz K, Metfies K (2017) Uncovering hidden biodiversity in the Cryptophyta: New picoplanktonic diversity from clone library studies at the Helgoland time series site in the southern German Bight. Vie et Milieu - Life & Environment 67:27

Piwosz K, Kownacka J, Ameryk A, Zalewski M, Pernthaler J (2016). Phenology of cryptomonads and the CRY1 lineage in a coastal brackish lagoon (Vistula Lagoon, Baltic Sea). J Phycol 52(4): 626

Piwosz K, Spich K, Całkiewicz J, Weydmann A, Kubiszyn A, Wiktor J. (2015) Distribution of small phytoflagellates along an Arctic fjord transect. Environ. Microbiol 17(7): 2393

Kędra M, Moritz C, Choy ES, Górska B, David C, Degen R, Duerksen S, Ellingsen I, Grebmeier JM, Kirievskaya D, van Oevelen D, Piwosz K, Samuelsen A, Węsławski JM. (2015) Status and trends in the ecoefficiency of Arctic food webs. Polar Res. 34: 23775

Piwosz K, Villiger J, Pernthaler J (2015) Numbers vs. reads: comparison of patterns in algal dynamics revealed by high throughput sequencing and microscopic counts. Eur. J. Phycol. 50(S1):134

Kubiszyn A, Piwosz K, Wiktor, J Jr, Wiktor J. (2014) The effect of inter-annual Atlantic water inflow variability on the planktonic protist community structure in the West Spitsbergen waters during the summer. J Plan Res 36(5): 1190

Piwosz K, Wiktor JM, Niemi A, Tatarek A, Michel C (2013) Mesoscale distribution and functional diversity of picoeukaryotes in the first-year sea ice of the Canadian Arctic. ISME J 7:1461

Kuklinski P, Berge J, McFadden L, Dmoch K, Zajaczkowski M, Nygård H, Piwosz K, Tatarek A (2013) Seasonality of occurrence and recruitment of Arctic marine benthic invertebrate larvae in relation to environmental variables. Polar Biol 36(4):549

Piwosz K, Salcher MM, Zeder M, Ameryk A, Pernthaler J (2013) Seasonal dynamics and activity of typical freshwater bacteria in brackish waters of the Gulf of Gdańsk, Limnol Oceanogr 58 (3):817

Kownacka J, Edler L, Gromisz S, Łotocka M, Olenina I, Ostrowska M, Piwosz K (2013) Nonindigenous species Chaetoceros cf. lorenzianus Grunow 1863 – A new, predominant component of autumn phytoplankton in the southern Baltic Sea. Estuar Coast Shelf Sci 119:101

Piwosz K, Pernthaler J (2011) Enrichment of Omnivorous Cercozoan Nanoflagellates from Coastal Baltic Sea Waters. PLoS ONE 6:e24415

Piwosz K, Pernthaler J (2010) Seasonal population dynamics and trophic role of planktonic nanoflagellates in coastal surface waters of the Southern Baltic Sea. Environ. Microbiol 12(2):364

Piwosz K, Walkusz W, Hapter R, Wieczorek P, Haakon H, Wiktor J (2009) Comparison of productivity and phytoplankton in a warm (Kongsfjorden) and a cold (Hornsund) Spitsbergen fjordin mid-summer 2002. Polar Biol 32:549

Wiktor J, Wojciechowska K (birth name) (2005) Differences in taxonomic composition of summerphytoplankton in two fjords of West Spitsbergen, Svalbard. Polish Polar Research 26 (4): 59

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