Microbial Ecology Lab
University Campus of Ioannina (UoI)
Building E4 (1st floor)
+302651-00-7341, +302651-00-7380
Website: https://sites.google.com/site/aquamicrolab


Karayanni Hera, Assistant Professor
Macingo Sofia (MSc), PhD student
Piperagas Odysseas (MSc), PhD student
Moschos Stefanos (Integrated MSc), PhD student
Vragalis Yorgos, Integrated MSc student
Asimakopoulos Christos, Integrated MSc student
Mihelis Thodoris, Integrated MSc student

Former students:
Michas Antonis, now post-doctoral researcher in Research Unit of Comparative Microbiome Analysis (München)
Soutziou Chrysa
Stefanidou Natasa now post-doc at the Aristotle University of Thessaloniki
Triantafyllidis Tasos, BSc, MSc, now research scientist in HCMR
Liamis Yannis
Papadopoulou Eleftheria, BSc, MSc now PhD student at  University of Gothenburg
Tsola Stefania, BSc, MSc, now PhD student at University of London
Renta Hristina
Athanasopoulou Any
Kokkou Georgia
Tolis Vasilis
Skouroliakou Ioli, now PhD student at Universite Littoral Cote d'Opale
Mironaki Katerina
Sartzis Yorgos
Nikolopoulou Ioanna, now MSc student, University of Athens
Levidiotis Haris
Dekoumes Yorgos

Meziti Alexandra, 2012-2014 now post-doc at the University of Thessaly


Research interests include (1) the investigation of factors that shape microbial communities in aquatic habitats, (2) the study of carbon flow within the microbial food webs

Current research activity (1) biogeography of aquatic protists, (2) micropollutants as vectors of microorganisms, (3) microbial food webs in artificial aquatic systems

Recent projects

Impact of salinity change on microplastic-associated bacterial assemblages (SALMIPAB) AQUACOSM – H2020-INFRIA-Project No 731065 Grant for Transnational Access in April-May 2020 (postponed to spring 2021, https://www.aquacosm.eu/transnational-access/)

Τhe relative role of niche and neutral mechanisms in controlling phytoplankton genetic and morphological diversity – ECOGENE, ARISTEIA II (GSRT) (2014-15)

Assessment of the ecological situation of Igoumenitsa Gulf. Co-financed by the European Union (European Regional Development Fund- ERDF) and Greek national funds through the Operational Program “THESSALY- MAINLAND GREECE AND EPIRUS-2007-2013” of the National Strategic Reference Framework (NSRF 2007-2013) (2012-2015)

Recent publications

  1. Moschos S, Piperagkas O, Karayanni H. Diverse, vertically and temporally persistent bacterial community in a shallow lake-water sediment site of a eutrophic lake. Inland Waters (accepted)
  2. Macingo SC, Kormas K, Oikonomou A, Karayanni H. (2019) Taxa-area and distance-decay relationships of unicellular eukaryotes along an elevation gradient of mountainous freshwater ecosystems. Journal of Plankton Research, 4(6):821-834 doi:
  3. Moustaka-Gouni M, Sommer U, Economou-Amilli A, Arhonditsis GB, Katsiapi M, Papastergiadou E, Kormas KA, Vardaka E, Karayanni H, Papadimitriou T (2019) Implementation of the Water Framework Directive: Lessons Learned and Future Perspectives for an Ecologically Meaningful Classification Based on Phytoplankton of the Status of Greek Lakes, Mediterranean Region. Environmental Management, 1-14 (pdf)
  4. Karayanni H, Kormas KA, Moustaka-Gouni M, Sommer U (2019) Changes in Heterotrophic Picoplankton Community Structure after Induction of a Phytoplankton Bloom under Different Light Regimes. Diversity 11(10) (pdf)
  5. Tatsika S, Karamanoli K, Karayanni H, Genitsaris S (2019) Metagenomic Characterization of Bacterial Communities on Ready-to-Eat Vegetables and Effects of Household Washing on their Diversity and Composition. Pathogens, 8, 37
  6. Karayanni H, Macingo SC, TolisV, Alivertis D (2019) Diversity of Bacteria in Lakes with Different Chlorophyll Content and Investigation of Their Respiratory Activity through a Long-Term Microcosm Experiment. Water, 11, 467. https://doi.org/10.3390/w11030467
  7. Meziti A, Tsementzi D, Rodriguez-R LM, Hatt JK, Karayanni H, Kormas K, Konstantinidis K (2018) Quantifying the changes in genetic diversity within sequence-discrete bacterial populations across a spatial and temporal riverine gradient. The ISME journal. DOI: 10.1038/s41396-018-0307-6
  8. Tsola SL, Renta C, Macingo SC, Karayanni H. (2018) Investigating size-fractionated chlorophyll a and phycocyanin temporal variations in a highly eutrophic lake and its isolated karstic springs. Oceanological and Hydrobiological Studies, 47(2): 118-127.  DOI: https://doi.org/10.1515/ohs-2018-0013
  9. Kokkinos P, Karayanni H, Meziti A, Feidaki R, Paparrodopoulos S, Vantarakis A (2018) Assessment of the Virological Quality of Marine and Running Surface Waters in NW Greece: A Case Study. Food Environ Virol. https://doi.org/10.1007/s12560-018-9344-6
  10. Karayanni, H.; Meziti, A.; Spatharis, S.; Genitsaris, S.; Courties, C.; Kormas, K.A. (2017) Changes in Microbial (Bacteria and Archaea) Plankton Community Structure after Artificial Dispersal in Grazer-Free Microcosms. Microorganisms5, 31.
  11. Meziti A, Tsementzi D, Kormas KA, Karayanni H, Konstantinidis KT (2016) Anthropogenic effects on bacterial diversity and function along a river-to estuary gradient in Northwest Greece revealed by metagenomics. Environ Microbiol  doi: 10.1111/1462-2920.13303
  12. Kormas KA, Pachiadaki MG, Karayanni H, Leadbetter ER, Bernhard JM, Edgcomb VP (2015) Inter-comparison of the potentially active prokaryotic communities in the halocline sediments of Mediterranean deep-sea hypersaline basins. Extremophiles DOI: 10.1007/s00792-015-0770-1
  13. Meziti A, Kormas KA, Moustaka-Gouni M, Karayanni H (2015) Spatially uniform but temporally variable bacterioplankton in asemi-enclosed coastal area Syst Appl Microbiol http://dx.doi.org/10.1016/j.syapm.2015.04.003
  14. Kormas KA, Karayanni H, Christaki U, Giannakourou A, Assimakopoulou G, Olympia Gotsis-Skretas O (2014) Microbial Food Web Structure and Its Impact on Primary Production in a Meso-Oligotrophic Coastal Area (Pagasitikos Gulf, Aegean Sea). Turkish Journal of Fisheries and Aquatic Sciences 14: 527-537 doi:10.4194/1303-2712-v14_2_24
  15. Nikouli E, Kormas KA, Berillis P, Karayanni H, Moustaka-Gouni M (2013) Harmful and parasitic unicellular eukaryotes persist in a shallow lake under reconstruction (L. Karla, Greece). Hydrobiologia 718:73–83
  16. Oikonomou A, Katsiapi M, Karayanni H, Moustaka-Gouni M, Kormas KA (2012) Plankton microorganisms coinciding with two consecutive mass fish kills in a newly reconstructed lake. TheScientificWorldJOURNAL The Scientific World Journal Volume 2012, Article ID 504135, doi:10.1100/2012/504135