Mgr. Kateřina Kopalová, Ph.D.
Researcher
I am mainly interested in the ecology, diversity, and biogeography of limno-terrestrial and aquatic diatoms (Bacillariophyceae) in polar and sub-polar regions, with a primary focus on Antarctica. Diatoms are eukaryotic unicellular algae present in almost every freshwater and terrestrial habitat (i.e. ponds, lakes, seepage areas, wet mosses and soils), and are one of the most diverse and abundant algal groups in Antarctica. Their species-specific morphological features, unique responses to different environmental conditions, and excellent preservation in sediments make diatoms excellent environmental indicators, useful in reconstructing climate changes, and model organisms for studying microbial species ranges and dispersal.
2023
Tytgat B., Verleyen E., Sweetlove M., Van den Berge K., Pinseel E., Hodgson D.A., Chown S.L., Sabbe K., Wilmotte A., Willems A., Polar lake Sampling Consortium, Vyverman W. (2023) Polar lake microbiomes have distinct evolutionary histories. Science Advances 9(46): eade7130. DOI: 10.1126/sciadv.ade7130
Kollár J., Kopalová K., Kavan J., Vrbická K., Nývlt D., Nedbalová L., Stibal M. & Kohler T.J. (2023) Recently-formed Antarctic lakes host less diverse bacterial and diatom communities than their older counterparts. FEMS Microbiology Ecology 99(9): fiad087. DOI: 10.1093/femsec/fiad087
2022
Chattová B., Cáhová T., Pinseel E., Kopalová K., Kohler T.J., Hrbáček F., Van de Vijver B. & Nývlt D. (2022) Diversity, ecology, and community structure of the terrestrial diatom flora from Ulu Peninsula (James Ross Island, NE Antarctic Peninsula). Polar Biology 45(5): 873–894. DOI: 10.1007/s00300-022-03038-z
2021
Kohler T.J., Howkins A., Sokol E.R., Kopalová K., Cox A., Darling J.P., Gooseff M.N. & McKnight D.M. (2021) From the Heroic Age to today: What diatoms from Shackleton’s Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds. Limnology and Oceanography Letters 6(6): 379–387. DOI: 10.1002/lol2.10200
Koppel D.J., Bishop J., Kopalová K., Price G.A.V., Brown K.E., Adams M.S., King C.K. & Jolley D.F. (2021) Metal lability and environmental risk in anthropogenically disturbed Antarctic melt streams. Environmental Pollution 278: 117627. DOI: 10.1016/j.envpol.2021.117627
Bishop J.M., Wasley J., Waterman M.J., Kohler T.J., Van de Vijver B., Robinson S.A. & Kopalová K. (2021) Diatom communities differ among Antarctic moss and lichen vegetation types. Antarctic Science 33(2): 118–132. DOI: 10.1017/S0954102020000620
Verleyen E., Van de Vijver B., Tytgat B., Pinseel E., Hodgson D.A., Kopalová K., Chown S.L., Van Ranst E., Imura S., Kudoh S., Van Nieuwenhuyze W., Sabbe K., Vyverman W. & ANTDIAT Consortium (2021) Diatoms define a novel freshwater biogeography of the Antarctic. Ecography 44(4): 548–560. DOI: 10.1111/ecog.05374
2020
Bishop J., Kopalová K., Kohler T.J., Van de Vijver B., Roberts D., McMinn A. & Gibson J. (2020) A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy. Diatom Research 35(3): 231–254. DOI: 10.1080/0269249X.2020.1794982
Bulínová M., Kohler T.J., Kavan J., Van de Vijver B., Nývlt D., Nedbalová L., Coria S.H., Lirio J.M. & Kopalová K. (2020) Comparison of Diatom Paleo-Assemblages with Adjacent Limno-Terrestrial Communities on Vega Island, Antarctic Peninsula. Water 12(5): 1340. DOI: 10.3390/w12051340
Lecomte K.L., Vignoni P.A., Echegoyen C.V., Santolaya P., Kopalová K., Kohler T.J., Roman M., Coria S.H. & Lirio J.M. (2020) Dissolved major and trace geochemical dynamics in Antarctic lacustrine systems. Chemosphere 240: 124938. DOI: 10.1016/j.chemosphere.2019.124938
Čejka T., Nývlt D., Kopalová K., Bulínová M., Kavan J., Lirio J.M., Coria S.H. & Van de Vijver B. (2020) Timing of the neoglacial onset on the North-Eastern Antarctic Peninsula based on lacustrine archive from Lake Anonima, Vega Island. Global and Planetary Change 184: 103050. DOI: 10.1016/j.gloplacha.2019.103050
2019
Bishop J., Kopalová K., Darling J.P., Schulte N.O., Kohler T.J., McMinn A., Spaulding S.A., McKnight D.M. & Van de Vijver B. (2019) Sabbea gen. nov., a new diatom genus (Bacillariophyta) from continental Antarctica. Phytotaxa 418(1): 42–56. DOI: 10.11646/phytotaxa.418.1.2
Kopalová K., Soukup J., Kohler T.J., Roman M., Coria S.H., Vignoni P.A., Lecomte K.L., Nedbalová L., Nývlt D. & Lirio J.M. (2019) Habitat controls on limno-terrestrial diatom communities of Clearwater Mesa, James Ross Island, Maritime Antarctica. Polar Biology 42(8): 1595–1613. DOI: 10.1007/s00300-019-02547-8
Roman M., Nedbalová L., Kohler T.J., Lirio J.M., Coria S.H., Kopáček J., Vignoni P.A., Kopalová K., Lecomte K.L., Elster J. & Nývlt D. (2019) Lacustrine systems of Clearwater Mesa (James Ross Island, north-eastern Antarctic Peninsula): geomorphological setting and limnological characterization. Antarctic Science 31(4): 169–188. DOI: 10.1017/S0954102019000178
Píšková A., Roman M., Bulínova M., Pokorný, M., Sanderson D., Cresswell A., Lirio J.M., Coria S.H., Nedbalová L., Lami A., Musazzi S., Van de Vijver B., Nývlt D. & Kopalová K. (2019) Late-Holocene palaeoenvironmental changes at Lake Esmeralda (Vega Island, Antarctic Peninsula) based on a multi-proxy analysis of laminated lake sediment. Holocene 29(7): 1155–1175. DOI: 10.1177/0959683619838033
2018
Kulichová J., Neustupa J., Vrbová K., Levkov Z. & Kopalová, K. (2018) Asymmetry in Luticola species. Diatom Research 34(2): 67–74. DOI: 10.1080/0269249X.2019.1604435
Bulínová M., Kochman-Kędziora N., Kopalová K. & Van de Vijver B. (2018) Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region. Phytotaxa 371(3): 168–184. DOI: 10.11646/phytotaxa.371.3.2
2017
Kociolek J.P., Kopalová K., Hamsher S.E., Kohler T.J., Van de Vijver B., Convey P. & McKnight D.M. (2017) Freshwater diatom biogeography and the genus Luticola: an extreme case of endemism in Antarctica. Polar Biology 40(6): 1185–1196. DOI: 10.1007/s00300-017-2090-7
Pinseel E., Hejduková E., Vanormelingen P., Kopalová K., Vyverman W. & Van de Vijver B. (2017) Pinnularia catenaborealis sp. nov. (Bacillariophyceae), a new chain-forming Distantes from James Ross Island and Vega Island (Maritime Antarctica). Phycologia 56(1): 94–107. DOI: 10.2216/16-18.1
Pinseel E., Van de Vijver B., Verleyen E., Kavan J. & Kopalová K. (2017) Diversity, ecology and community sructure of the freshwater littoral diatom flora from petuniabukta (Spitsbergen). Polar Biology 40(3): 533–551. DOI: 10.1007/s00300-016-1976-0
Pinseel E., Vanormelingen P., Hamilton P.B., Vyverman W., Van de Vijver B. & Kopalová K. (2017) Molecular and morphological characterization of the Achnanthidium minutissimum complex (Bacillariophyta) in Petuniabukta (Spitsbergen, High Arctic) including the description of A. digitatum sp nov. European Journal of Phycology 52(3): 264-280. DOI: 10.1080/09670262.2017.1283540
2016
Zidarova R., Kopalova K. & Van de Vijver B. (2016) Diatoms from the Antarctic Region. I: Maritime Antarctica. Annotated Diatom Micrograph. Ed. by Horst Lange – Bertalot. Volume 24: 216 photographic plates. 509 p. Hardcover. (ISBN 978-3-946583-05-9)
Hamsher S., Kopalová K., Kociolek P.J., Zidarova R. & Van de Vijver B. (2016) The genus Nitzschia on the South Shetland Islands and James Ross Island (Maritime Antarctica). Fottea 16(1): 79–102. DOI: 10.5507/fot.2015.023
Kochman-Kędziora N., Noga T., Zidarova R., Kopalová K. & Van de Vijver B. (2016) Humidophila komarekiana sp. nov. (Bacillariophyta), a new limnoterrestrial diatom species from King George Island (Maritime Antarctica). Phytotaxa 272(3): 184–190. DOI: 10.11646/phytotaxa.272.3.2
Kopalová K., Zidarova R. & Van de Vijver B. (2016) Four new monoraphid diatom species (Bacillariophyta, Achnanthaceae) from the Maritime Antarctic Region. European Journal of Taxonomy 217: 1–19. DOI: 10.5852/ejt.2016.217
Lecomte K.L., Vignoni P., Córdoba F.E., Chaparro Marcos A.E., Chaparro Mauro A.E., Kopalová K., Gargiulo J.D., Lirio J.M., Irurzun M.A. & Böhnel H.N. (2016) Hydrological systems from the Antarctic Peninsula under climate change: James Ross Archipelago as study case. Environmental Earth Sciences 75(7): 623.
DOI: 10.1007/s12665-016-5406-y
Vinšová P., Kopalová K. & Van de Vijver B. (2016) Morphological observations on Pseudeunotia linearis Carter (Bacillariophyta) and its transfer to the genus Eunotia. Botany Letters 163(2): 117-123.
Van de Vijver B., Kopalová K. & Zidarova R. (2016) Revision of the Psammothidium germainii complex (Bacillariophyta) in the Maritime Antarctic Region. Fottea 16(2): 145–156. DOI: 10.5507/fot.2016.008
Van de Vijver B., Kopalová K., Zidarova R. & Kociolek J.P. (2016) Two new Gomphonema species (Bacillariophyta) from the Maritime Antarctic Region. Phytotaxa 269(3): 209–220. DOI: 10.11646/phytotaxa.269.3.4
Zidarova R., Kopalová K. & Van de Vijver B. (2016) Ten new Bacillariophyta species from James Ross Island and the South Shetland Islands (Maritime Antarctic Region). Phytotaxa 272(1): 037–062. DOI: 10.11646/phytotaxa.272.1.2
2015
Vinšová P., Pinseel E., Kohler T.J., Van de Vijver B., Žárský J.D., Kavan J. & Kopalová K. (2015) Diatoms in cryoconite holes and adjacent proglacial freshwater sediments, Nordenskiöld glacier (Spitsbergen, High Arctic). Czech Polar Reports 5(2): 112–133. DOI: 10.5817/CPR2015-2-11
Kopalová K.,Kociolek P.J., Lowe R.L., Zidarova R. & Van De Vijver B. (2015) Five new species of the genus Humidophila (Bacillariophyta) from the Maritime Antarctic Region. Diatom Research 30(2): 117–131. DOI: 10.1080/0269249X.2014.998714
Kohler T.J., Kopalová K., Van de Vijver B. & Kociolek J.P. (2015) The genus Luticola D.G.Mann (Bacillariophyta) from the McMurdo Sound Region, Antarctica, with the description of 4 new species. Phytotaxa 208(2): 103–134. DOI: 10.11646/phytotaxa.208.2.1
Pinseel E., Van de Vijver B. & Kopalová K. (2015) Achnanthidium petuniabuktianum sp. nov. Achnanthidiaceae, Bacillariophyta), a new representative of the A. pyrenaicum group from Spitsbergen (Svalbard Archipelago, High Arctic). Phytotaxa 226 (1): 063–074. DOI: 10.11646/phytotaxa.226.1.6
Van de Vijver B., Kopalová K., Kociolek J.P. & Ector L. (2015) Denticula jamesrossensis, a new freshwater diatom (Bacillariophyta) species from the Maritime Antarctic Region. Fottea 15(1): 105–111. DOI: 10.5507/fot.2015.009
Van de Vijver B., Kopalová K. & Zidarova R. (2015) Three new Craticula species (Bacillariophyta) from the Maritime Antarctic Region. Phytotaxa 213(1): 035–045. DOI: 10.11646/phytotaxa.213.1.3
2014
Van de Vijver B., Kopalová K., Zidarova R. & Levkov Z. (2014) Revision of the genus Halamphora (Bacillariophyta) in the Antarctic Region. Plant Ecology and Evolution 147: 374–391. DOI: 10.5091/plecevo.2014.979
Wetzel C.E., Van de Vijver B., Kopalová K., Hoffmann L., Pfister L. & Ector L. (2014) Type analysis of the South American diatom Achnanthes haynaldii (Bacillariophyta) and description of Planothidium amphibium sp. nov., from aerial and aquatic environments of Oregon (USA). Plant Ecology and Evolution 14: 439–454. DOI: 10.5091/plecevo.2014.1058
Van de Vijver B., Morales E.A. & Kopalová K. (2014) Three new araphid diatoms (Bacillariophyta) from the Maritime Antarctic Region. Phytotaxa 167(30): 256–266. DOI: 10.11646/phytotaxa.167.3.4
Pinseel E., Kopalová K. & Van de Vijver B. (2014) Gomphonema svalbardense sp. nov., a new freshwater diatom species (Bacillariophyta) from the Arctic Region. Phytotaxa 170(4): 250–258. DOI: 10.11646/phytotaxa.170.4.2
Van de Vijver B. & Kopalová, K. (2014) Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthes minutissima from the Antarctic Region. European Journal of Taxonomy 79: 1–19. DOI: 10.5852/ejt.2014.79
Hamilton P., De Haan M., Kopalová K., Zidarova R. & Van de Vijver B. (2014) An evaluation of selected Neidium species from the Antarctic Region. Diatom Research 29(1): 27–40. DOI: 10.1080/0269249X.2013.822020
Kopalová K., Ochyra R., Nedbalová L. & Van de Vijver B. (2014) Moss-inhabiting diatoms from two contrasting Maritime Antarctic islands. Plant Ecology and Evolution 147(1): 67–84. DOI: 10.5091/plecevo.2014.896
Lowe R.L., Kociolek P., Johansen J.R., Van de Vijver B., Lange-Bertalot H. & Kopalová K. (2014) Humidophila gen. nov., a new genus for a clade of diatoms (Bacillariophyta) formerly within the genus Diadesmis: species from Hawai’i, including one new species. Diatom Research 29(4): 351–360. DOI: 10.1080/0269249X.2014.889039
Van de Vijver B., Zidarova R. & Kopalová K. (2014) New species in the genus Muelleria (Bacillariophyta) from the Maritime Antarctic Region. Fottea 14(1): 77–90. DOI: 10.5507/fot.2014.006
Zidarova R., Kopalová K. & Van de Vijver B. (2014) The genus Stauroneis (Bacillariophyta) from the South Shetland Islands and James Ross Island (Antarctica). Fottea 14(2): 201–207. DOI: 10.5507/fot.2014.015
Kopalová K. & Van de Vijver B. (2013) Structure and ecology of freshwater benthic diatom communities from Byers Peninsula (Livingston Island, South Shetland Island). Antarctic Science 25(2): 239–253. DOI: 10.1017/S0954102012000764
2013
Kopalová K., Nedbalová L., Nývlt D., Elster J. & Van de Vijver B. (2013) Diversity, ecology and biogeography of the freshwater diatom communities from Ulu Peninsula (James Ross Island, NE Antarctic Peninsula). Polar Biology 36(7): 933–948. DOI: 10.1007/s00300-013-1317-5
Van de Vijver B., Cocquyt C., De Haan M., Kopalová K. & Zidarova R. (2013) The genus Surirella (Bacillariophyta) in the sub Antarctic and Maritime Antarctic region. Diatom Research 28(1): 92-108. DOI: 10.1080/0269249X.2012.739975
Van de Vijver B., Kopalová K., Zidarova R. & Cox E. J. (2013) New and interesting small-celled naviculoid taxa from the Maritime Antarctic Region. Nova Hedwigia 97(1-2): 189-208. DOI: 10.1127/0029-5035/2013/0101
Van de Vijver B., Wetzel C., Kopalová K., Zidarova R. & Ector L. (2013) Analysis of the type material of Achnanthidium lanceolatum Brébisson ex Kützing (Bacillariophyta) with the description of two new Planothidium species from the Antarctic Region. Fottea 13(2): 105-117. DOI: 10.5507/fot.2013.010
2012
Kopalová K., Elster J., Komárek J., Veselá J., Nedbalová L. & Van de Vijver B. (2012) Benthic diatoms (Bacillariophyta) from seepages and streams on James Ross Island (NW Weddell Sea, Antarctica). Plant Ecology and Evolution 145(2): 190–208.
Zidarova R., Kopalová K. & Van de Vijver B. (2012) The genus Pinnularia (Bacillariophyta) excluding the sectio Distantes on Livingston Island (South Shetland Islands) with the description of the new taxa. Phytotaxa 44: 11–37. DOI: 10.11646/phytotaxa.44.1.2
2011
Kopalová K., Nedbalová L., de Haan M. & Van de Vijver B. (2011) Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region). Phytotaxa 27: 44–60. DOI: 10.11646/phytotaxa.27.1.5
2010
Van de Vijver B., Sterken M., Vyverman W., Mataloni G., Nedbalová L., Kopalová K., Elster J., Verleyen E. & Sabbe K. (2010) Four new non-marine diatom taxa from the Subantarctic and Antarctic Regions. Diatom Research 25(2): 431–443. DOI: 10.1080/0269249X.2010.9705861
2009
Kopalová K., Elster J., Nedbalová L. & Van de Vijver B. (2009) Three new terrestrial diatom species from seepage areas on James Ross Island (Maritime Antarctic Region). Diatom Research 24(1): 113–122. DOI: 10.1080/0269249X.2009.9705786
Zidarova R., Van de Vijver B., Mataloni G., Kopalová K. & Nedbalová L. (2009) Four new freshwater diatom species (Bacillariophyceae) from Antarctica. Cryptogamie Algologie 30(4): 295–310.
2008
Van de Vijver B. & Kopalová K. (2008) Orthoseira gremmenii sp. nov., a new aerophilic diatom from Gough Island (Southern Atlantic Ocean). Cryptogamie Algologie 29(2): 105–118.
Esposito R.M.M., Spaulding S.A., McKnight D.M., Van de Vijver B., Kopalová K., Lubinski D., Hall B. & Whittaker T. (2008) Inland diatoms from the McMurdo Dry Valleys and James Ross Island, Antarctica. Botany 86(12): 1378–1392. DOI: 10.1139/B08-100
Tyler J. Kohler, Ph.D.
Researcher
I am an ecologist primarily interested in how freshwater microbial communities are formed, maintained, and interact with their world, especially within the context of the global climate crisis. At present, my research focusses on the community dynamics and biogeochemical cycling taking place within the benthic biofilms of glacier-fed streams.
2024
Stanish, L.F., Kohler T.J., Darling J., & McKnight D.M. (2024). Drifting along: Using diatoms to track the contribution of microbial mats to particulate organic matter transport in a glacial meltwater stream in the McMurdo Dry Valleys, Antarctica. Frontiers in Microbiology 15: 1352666. DOI: 10.3389/fmicb.2024.1352666
Kohler T.J., Bourquin M., Peter H., Yvon-Durocher G., Sinsabaugh R.L., Deluigi N., Styllas M., Vanishing Glaciers Field Team & Battin T.J. (2024). Global emergent responses of stream microbial metabolism to glacier shrinkage. Nature Geoscience 17: 309–315. DOI: 10.1038/s41561-024-01393-6
Busi S.B., Peter H., Brandani J., Kohler T.J., Fodelianakis S., Pramateftaki P., Bourquin M., Michoud G., Ezzat L., Lane S., Wilmes P. & Battin T.J. (2024) Cross-domain interactions confer stability to benthic biofilms in proglacial streams. Frontiers in Microbiomes 2: 1280809. DOI: 10.3389/frmbi.2023.1280809
2023
Kohler T.J., Singley J.G., Wlostowski A.N. & McKnight D.M. (2023) Nitrogen fixation facilitates stream microbial mat biomass across the McMurdo Dry Valleys, Antarctica. Biogeochemistry 166: 247–268. DOI: 10.1007/s10533-023-01069-0
Kollár J., Kopalová K., Kavan J., Vrbická K., Nývlt D., Nedbalová L., Stibal M. & Kohler T.J. (2023) Recently-formed Antarctic lakes host less diverse bacterial and diatom communities than their older counterparts. FEMS Microbiology Ecology 99(9): fiad087. DOI: 10.1093/femsec/fiad087
Michoud G., Kohler T.J., Peter H., Brandani J., Busi S.B. & Battin T.J. (2023) Unexpected functional diversity of stream biofilms within and across proglacial floodplains despite close spatial proximity. Limnology and Oceanography 68(9): 2183-2194. DOI: 10.1002/lno.12415
Michoud G, Kohler T.J., Ezzat L., Peter H., Kigongo Nattabi J., Nalwanga R., Pramateftaki P., Styllas M., Tolosano M., De Staercke V., Schön M., Marasco R., Daffonchio D., Bourquin M., Busi S.B. & Battin T.J. (2023). The dark side of the moon: first insights into the microbiome structure and function of one of the last glacier-fed streams in Africa. Royal Society Open Science 10(8): 230329. DOI: 10.1098/rsos.230329
Brandani J., Peter H., Fodelianakis S., Kohler T.J., Bourquin M., Michoud G., Busi S.B., Ezzat L., Lane S. & Battin T.J. (2023) Homogeneous environmental selection structures the bacterial communities of benthic biofilms in proglacial floodplain streams. Applied and Environmental Microbiology 89(3): e02010-22. DOI: 10.1128/aem.02010-22
Busi S.B., de Nies L., Pramateftaki P., Bourquin M., Kohler T.J., Ezzat L., Fodelianakis S., Michoud G., Peter H., Styllas M., Tolosano M., De Staercke V., Schön M., Galata V., Wilmes P. & Battin T.J. (2023) Glacier-fed stream biofilms harbour diverse resistomes and biosynthetic gene clusters. Microbiology Spectrum 11(1): e04069-22. DOI: 10.1128/spectrum.04069-22
2022
Vrbická K., Kohler T.J., Falteisek L., Hawkings J.R., Vinšová P., Bulínova M., Lamarche-Gagnon G., Hofer S., Kellerman A.M., Holt A.D., Cameron K.A., Schön M., Wadham J.L. & Stibal M. (2022) Catchment characteristics and seasonality control the composition of microbial assemblages exported from three outlet glaciers of the Greenland Ice Sheet. Frontiers in Microbiology 13: 1035197. DOI: 10.3389/fmicb.2022.1035197
Brandani J., Peter H., Busi S.B, Kohler T.J., Fodelianakis S., Ezzat L., Michoud G., Bourquin M., Pramateftaki P., Roncoroni M., Lane S.N. & Battin T.J. (2022) Spatial patterns of benthic biofilm diversity among streams draining proglacial floodplains. Frontiers in Microbiology
13: 948165. DOI: 10.3389/fmicb.2022.948165
Bourquin M., Busi S.B., Fodelianakis S., Peter H., Washburne A., Kohler T.J., Ezzat L., Wilmes P. & Battin T.J. (2022) The microbiome of cryospheric ecosystems. Nature Communications 13: 3087. DOI: 10.1038/s41467-022-30816-4
Ezzat L., Fodelianakis S., Kohler T.J., Bourquin M., Brandani J., Busi S.B., Daffonchio D., de Staercke V., Marasco R., Michoud G., Oppliger E., Peter H., Pramateftaki P., Schön M., Styllas M., Tadei V., Tolosano M. & Battin T.J. (2022) Benthic biofilms in glacier-fed streams from Scandinavia to the Himalayas host distinct bacterial communities compared to the streamwater. Applied and Environmental Microbiology 88(12): e00421-22. DOI: 10.1128/aem.00421-22
Roncoroni M., Mancini D., Kohler T.J., Miesen F., Gianini M., Battin T.J. & Lane S.N. (2022) Centimeter-scale mapping of phototrophic biofilms in glacial forefields using visible band ratios and UAV imagery. International Journal of Remote Sensing 43(13): 4723-4757. DOI: 10.1080/01431161.2022.2079963
Busi S.B., Bourquin M., Fodelianakis S., Michoud G., Kohler T.J., Peter H., Pramateftaki P., Styllas M., Tolosano M., de Staercke V., Schön M., de Nies L., Marasco R., Daffonchio D., Ezzat L., Wilmes P. & Battin T.J. (2022) Genomic and metabolic adaptations of biofilms to ecological windows of opportunities in glacier-fed streams. Nature Communications 13: 2168. DOI: 10.1038/s41467-022-29914-0
Chattová B., Cahová T., Pinseel E., Kopalová K., Kohler T.J., Hrbáček F., Van de Vijver B. & Nývlt D. (2022) Diversity, ecology, and community structure of the terrestrial diatom flora from Ulu Peninsula (James Ross Island, NE Antarctic Peninsula). Polar Biology 45(5): 873–894. DOI: 10.1007/s00300-022-03038-z
Kohler T.J., Fodelianakis S., Michoud G., Ezzat L., Bourquin M., Peter H., Busi S.B., Pramateftaki P., Deluigi N., Styllas M., Tolosano M., de Staercke V., Schön M., Brandani J., Marasco R., Daffonchio D., Wilmes P. & Battin T.J. (2022) Glacier shrinkage will accelerate downstream decomposition of organic matter and alters microbiome structure and function. Global Change Biology 28(12): 3846-3859. DOI: 10.1111/gcb.16169
Vinšová P., Kohler T.J., Simpson M.J., Hajdas I., Yde J.C., Falteisek L., Žárský J.D., Yuan T., Tejnecký V., Mercl F., Hood E. & Stibal M. (2022) The biogeochemical legacy of Arctic subglacial sediments exposed by glacier retreat. Global Biogeochemical Cycles 36(3): e2021GB007126. DOI: 10.1029/2021GB007126
Fodelianakis S., Washburne A.D., Bourquin M., Pramateftaki P., Kohler T.J., Styllas M., Tolosano M., de Staercke V., Schön M., Busi S.B., Brandani J., Wilmes P., Peter H. & Battin T.J. (2022) Microdiversity characterizes prevalent phylogenetic clades in the glacier-fed stream microbiome. The ISME Journal 16: 666–675. DOI: 10.1038/s41396-021-01106-6
2021
Kohler T.J., Howkins A., Sokol E.R., Kopalová K., Cox A., Darling J.P., Gooseff M.N. & McKnight D.M. (2021) From the Heroic Age to today: What diatoms from Shackleton’s Nimrod expedition can tell us about the ecological trajectory of Antarctic ponds. Limnology and Oceanography Letters 6(6): 379–387. DOI: 10.1002/lol2.10200
Hawkings J.R., Linhoff B.S., Wadham J.L., Stibal M., Lamborg C.H., Carling G.T., Falteisek L., Ward R., Hendry K.R., Lamarche-Gagnon G., Kohler T.J., Kellerman A.M., Cameron K., Hatton J.E., Tingey S., Holt A., Vinšová P., Hofer S., Bulínová M., Větrovský T., Meire L. & Spencer R.G.M. (2021) Large subglacial source of mercury from the southwestern margin of the Greenland Ice Sheet. Nature Geoscience 14: 496–502. DOI: 10.1038/s41561-021-00753-w
Bishop J.M., Wasley J., Waterman M.J., Kohler T.J., Van de Vijver B., Robinson S.A. & Kopalová K. (2021) Diatom communities differ among Antarctic moss and lichen vegetation types. Antarctic Science 33(2): 118–132. DOI: 10.1017/S0954102020000620
Verleyen E., Van de Vijver B., Tytgat B., Pinseel E., Hodgson D.A., Kopalová K., Chown S.L., Van Ranst E., Imura S., Kudoh S., Van Nieuwenhuyze W., Sabbe K., Vyverman W. & ANTDIAT Consortium (2021) Diatoms define a novel freshwater biogeography of the Antarctic. Ecography 44(4): 548–560. DOI: 10.1111/ecog.05374
2020
Hawkings J.R., Skidmore M.L., Wadham J.L., Priscu J.C., Morton P.L., Hatton J.E., Gardner C., Kohler T.J., Stibal M., Bagshaw E., Lamarche-Gagnon G., Steigmayer A., Barker J., Lyons W.B., Tranter M., Spencer R.G.M. & the SALSA Science Team (2020) Enhanced trace element mobilization from the Earth’s ice sheets. Proceedings of the National Academy of Sciences of the United States of America. 117(50): 31648–31659. DOI: 10.1073/pnas.2014378117
Kohler T.J., Peter H., Fodelianakis S., Pramateftaki P., Tolosano M., de Staercke V., Schön M., Styllas M., Busi S.B., Wilmes P., Washburne A. & Battin T.J. (2020) Patterns and drivers of extracellular enzyme activity in New Zealand glacier-fed streams. Frontiers in Microbiology.
11: 591465. DOI: 10.3389/fmicb.2020.591465
Sokol E.R., Barrett J.E., Kohler T.J., McKnight D.M., Salvatore M.R. & Stanish L.F. (2020) Evaluating alternative metacommunity hypotheses for diatoms in the McMurdo Dry Valleys using simulations and remote sensing data. Frontiers in Ecology and Evolution 8: 521668. DOI: 10.3389/fevo.2020.521668
Bishop J., Kopalová K., Kohler T.J., Van de Vijver B., Roberts D., McMinn A. & Gibson J. (2020) A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy. Diatom Research 35(3): 231–254. DOI: 10.1080/0269249X.2020.1794982
Pinseel E., Janssens S.B., Verleyen E., Vanormelingen P., Biersma E.M., Kohler T.J., Sabbe K., Van de Vijver B. & Vyverman W. (2020) Global radiation in a rare biosphere soil diatom. Nature Communications 11: 2382. DOI: 10.1038/s41467-020-16181-0
Bulínová M., Kohler T.J., Kavan J., Van de Vijver B., Nývlt D., Nedbalová L., Coria S.H., Lirio J.M. & Kopalová K. (2020) Comparison of Diatom Paleo-Assemblages with Adjacent Limno-Terrestrial Communities on Vega Island, Antarctic Peninsula. Water 12(5): 1340. DOI: 10.3390/w12051340
Lecomte K.L., Vignoni P.A., Echegoyen C.V., Santolaya P., Kopalová K., Kohler T.J., Roman M., Coria S.H. & Lirio J.M. (2020) Dissolved major and trace geochemical dynamics in Antarctic lacustrine systems. Chemosphere 240: 124938. DOI: 10.1016/j.chemosphere.2019.124938
Kohler T.J., Vinšová P., Falteisek L., Žárský J.D., Yde J.C., Hatton J.E., Hawkings J.R., Lamarche-Gagnon G., Hood E., Cameron K.A. & Stibal M. (2020) Patterns in microbial assemblages exported from the meltwater of Arctic and Sub-Arctic glaciers. Frontiers in Microbiology 11: 669. DOI: 10.3389/fmicb.2020.00669
Stibal M., Bradley J.A., Edwards A., Hotaling S., Zawierucha K., Rosvold J., Lutz S., Cameron K.A., Mikucki J.A., Kohler T.J., Šabacká M. & Anesio A.M. (2020) Glacial ecosystems are essential to understanding biodiversity responses to glacier retreat. Nature Ecology & Evolution 4(5): 686–687. DOI: 10.1038/s41559-020-1163-0
Kellerman A.M., Hawkings J.R., Wadham J.L., Kohler T.J., Stibal M., Grater E., Marshall M., Hatton J.E., Beaton A. & Spencer R.G.M. (2020) Glacier outflow dissolved organic matter as a window into seasonally changing carbon sources: Leverett Glacier, Greenland. Journal of Geophysical Research – Biogeosciences 125(4): e2019JG005161. DOI: 10.1029/2019JG005161
2019
Bishop J., Kopalová K., Darling J.P., Schulte N.O., Kohler T.J., McMinn A., Spaulding S.A., McKnight D.M. & Van de Vijver B. (2019) Sabbea gen. nov., a new diatom genus (Bacillariophyta) from continental Antarctica. Phytotaxa 418(1): 042–056. DOI: 10.11646/phytotaxa.418.1.2
Kopalová K., Soukup J., Kohler T.J., Roman M., Coria C.H., Vignoni P.A., Lecomte K.L., Nedbalová L., Nývlt D. & Lirio J.M. (2019) Habitat controls on limno-terrestrial diatom communities of Clearwater Mesa, James Ross Island, Maritime Antarctica. Polar Biology 42(8): 1595–1613. DOI: 10.1007/s00300-019-02547-8
Hatton J.E., Hendry K.R., Hawkings J.R., Wadham J.L., Opfergelt S., Kohler T.J., Yde J.C., Stibal M. & Žárský J.D. (2019). Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of the subglacial environment in the silicon cycle. Proceedings of the Royal Society A 475(2228): 20190098. DOI: 10.1098/rspa.2019.0098
Roman M., Nedbalová L., Kohler T.J., Lirio J.M., Coria S.H., Kopáček J., Vignoni P.A., Kopalová K., Lecomte K.L., Elster J. & Nývlt D. (2019). Lacustrine systems of Clearwater Mesa (James Ross Island, north-eastern Antarctic Peninsula): geomorphological setting and limnological characterization. Antarctic Science 31(4): 169–188. DOI: 10.1017/S0954102019000178
Yde J.C., Žárský J.D., Kohler T.J., Knudsen N.T., Gillespie M.K. & Stibal M.. (2019). Kuannersuit Glacier revisited: Constraining ice dynamics, landform formations and glaciomorphological changes in the early quiescent phase following the 1995-98 surge event. Geomorphology 330: 89–99. DOI: 10.1016/j.geomorph.2019.01.012
Hatton J.E., Hendry K.R., Hawkings J.R., Wadham J.L., Kohler T.J., Stibal M., Beaton A., Bagshaw E.A. & Telling J. (2019) Investigation of subglacial weathering under the Greenland Ice Sheet using silicon isotopes. Geochimica et Cosmochimica Acta 247: 191–206. DOI: 10.1016/j.gca.2018.12.033
Lamarche-Gagnon G., Wadham J.L., Lollar B.S., Arndt S., Fietzek P., Beaton A.D., Tedstone A.J., Telling J., Bagshaw E., Hawkings J.R., Kohler T.J., Žárský J.D., Mowlem M.C., Anesio A. & Stibal M. (2019) Greenland melt drives continuous export of methane from its bed. Nature 565(7737): 73–77. DOI: 10.1038/s41586-018-0800-0
2018
Hawkings J.R., Hatton J., Hendry K.R., De Souza G., Wadham J.L., Ivanovic R.F., Kohler T.J., Stibal M., Beaton A., Lamarche-Gagnon G., Tedstone A., Hain M., Bagshaw E., Pike J. & Tranter M. (2018) The silicon cycle impacted by past ice sheets. Nature Communications 9(1): 3210. DOI: 10.1038/s41467-018-05689-1
Žárský J.D., Kohler T.J., Yde J.C., Falteisek L., Lamarche-Gagnon G., Hawkings J.R., Hatton J.E. & Stibal M. (2018) Prokaryotic assemblages in suspended and subglacial sediments within a glacierized catchment on Qeqertarsuaq (Disko Island), west Greenland. FEMS Microbiology Ecology 94(7): fiy100. DOI: 10.1093/femsec/fiy100
Kohler T.J., Stanish L.F., Liptzin D., Barrett J.E. & McKnight D.M. (2018) Catch and release: hyporheic retention and mineralization of N-fixing Nostoc sustains downstream microbial mat biomass in two polar desert streams. Limnology and Oceanography Letters 3(4): 357–364. DOI: 10.1002/lol2.10087
2017
Zandonà E., Dalton C., El-Sabaawi R.W., Howard J.L., Marshall M.C., Kilham S.S., Reznick D.N., Travis J., Kohler T.J., Flecker A.S., Thomas S.A. & Pringle C.M. (2017) Population variation in the trophic niche of the Trinidadian guppy from different predation regimes. Scientific Reports 7(1): 5770. DOI: 10.1038/s41598-017-06163-6
Kociolek J.P., Kopalová K., Hamsher S.E., Kohler T.J., Van de Vijver B., Convey P. & McKnight D.M. (2017) Freshwater diatom biogeography and the genus Luticola: an extreme case of endemism in Antarctica. Polar Biology 40(6): 1185–1196. DOI: 10.1007/s00300-017-2090-7
Kohler T.J., Žárský J.D., Yde J.C., Lamarche-Gagnon G., Hawkings J.R., Tedstone A.J., Wadham J.L., Box J.E., Beaton A.D. & Stibal M. (2017) Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet. Geophysical Research Letters 44(12): 6209–6217. DOI: 10.1002/2017GL073219
Cameron K.A., Stibal M., Hawkings J.R., Mikkelsen A.B., Telling J., Kohler T.J., Gözdereliler E., Žárský J.D., Wadham J.L. & Jacobsen C.S. (2017) Meltwater export of prokaryotic cells from the Greenland Ice Sheet. Environmental Microbiology 19(2): 524–534. DOI: 10.1111/1462-2920.13483
2016
Van Horn D.J., Wolf C.R., Colman D.R., Jiang X., Kohler T.J., McKnight D.M., Stanish L.F., Yazzie T. & Takacs-Vesbach C.D. (2016) Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica. FEMS Microbiology Ecology 92(10): fiw148. DOI: 10.1093/femsec/fiw148
Kohler T.J., Van Horn D.J., Darling J.P., Takacs-Vesbach C.D. & McKnight D.M. (2016) Nutrient treatments alter microbial mat colonization in two glacial meltwater streams from the McMurdo Dry Valleys, Antarctica. FEMS Microbiology Ecology 92(4): fiw049. DOI: 10.1093/femsec/fiw049
Sakaeva A., Sokol E.R., Kohler T.J., Stanish L.F., Spaulding S.A., Howkins A., Welch K.A., Lyons W.B., Barrett J.E. & McKnight D.M. (2016) Evidence for dispersal and habitat controls on pond diatom communities from the McMurdo Sound Region of Antarctica. Polar Biology 39(12): 2441–2456. DOI: 10.1007/s00300-016-1901-6
Collins S.M., Kohler T.J., Thomas S.A., Fetzer W.W. & Flecker A.S. (2016) The importance of terrestrial subsidies in stream food webs varies along a stream size gradient. Oikos 125(5): 674–685. DOI: 10.1111/oik.02713
2015
Vinšová P., Pinseel E., Kohler T.J., Van de Vijver B., Žárský J.D., Kavan J. & Kopalová K. (2015) Diatoms in cryoconite holes and adjacent proglacial freshwater sediments, Nordenskiöld glacier (Spitsbergen, High Arctic). Czech Polar Reports 5(2): 112–133. DOI: 10.5817/CPR2015-2-11
Kohler T.J., Kopalová K., Van de Vijver B. & Kociolek J.P. (2015) The genus Luticola D.G.Mann (Bacillariophyta) from the McMurdo Sound Region, Antarctica, with the description of 4 new species. Phytotaxa 208(2): 103–134. DOI: 10.11646/phytotaxa.208.2.1
Kohler T.J., Chatfield E., Gooseff M.N., Barrett J.E. & McKnight D.M. (2015) Recovery of Antarctic stream epilithon from simulated scouring events. Antarctic Science 27(4): 341–354. DOI: 10.1017/S0954102015000024
Kohler T.J., Stanish L.F., Crisp S.W., Koch J.C., Liptzin D., Baeseman J.L. & McKnight D.M. (2015) Life in the main channel: long-term hydrologic control of microbial mat abundance in McMurdo Dry Valley streams, Antarctica. Ecosystems 18(2): 310–327. DOI: 10.1007/s10021-014-9829-6
2012
Kohler T.J., Heatherly II T.N., El-Sabaawi R.W., Zandonà E., Marshall M.C., Flecker A.S., Pringle C.M., Reznick D.N. & Thomas S.A. (2012) Flow, nutrients and light availability influence Neotropical epilithon biomass and stoichiometry. Freshwater Science 31(4): 1019–1034. DOI: 10.1899/11-141.1
Stanish L.F., Kohler T.J., Esposito R.M.M., Simmons B.L., Nielsen U.N., Wall D.H., Nemergut D.R. & McKnight D.M. (2012) Extreme streams: flow intermittency as a control on diatom communities in meltwater streams in the McMurdo Dry Valleys, Antarctica. Canadian Journal of Fisheries and Aquatic Sciences 69(8): 1405–1419. DOI: 10.1139/f2012-022
El-Sabaawi R.W., Zandonà E., Kohler T.J., Marshall M.C., Moslemi J.M., Travis J., López-Sepulcre A., Ferriére R., Pringle C.M., Thomas S.A., Reznick D.N. & Flecker A.S. (2012) Widespread intraspecific organismal stoichiometry among populations of the Trinidadian guppy (Poecilia reticulata). Functional Ecology 26(3): 666–676. DOI: 10.1111/j.1365-2435.2012.01974.x
El-Sabaawi R.W., Kohler T.J., Zandonà E., Travis J., Marshall M.C., Thomas S.A., Reznick D.N., Walsh M., Gilliam J.F., Pringle C.M. & Flecker A.S. (2012) Environmental and organismal predictors of intraspecific variation in the stoichiometry of a neotropical freshwater fish. PLoS ONE 7(3): e32713. DOI: 10.1371/journal.pone.0032713
Auer S.K., Lopez-Sepulcre A., Heatherly II T.N., Kohler T.J., Bassar R.D., Thomas S.A. & Reznick D.N. (2012) Life histories have a history: Effects of past and present conditions on somatic growth in wild Trinidadian guppies. Journal of Animal Ecology 81(4): 818–826. DOI: 10.1111/j.1365-2656.2012.01964.x
2011
Kohler T.J., Murdock J.N, Gido K.B. & Dodds W.K. (2011) Nutrient loading and grazing by the minnow Phoxinus erythrogaster shift periphyton abundance and stoichiometry in mesocosms. Freshwater Biology 56(6): 1133–1146. DOI: 10.1111/j.1365-2427.2010.02557.x
Mgr. Jan Kollár, Ph.D.
Researcher
I am interested in the diversity, ecology and evolution of diatoms, especially in the cryosphere-associated habitats of the alpine and polar regions of the Earth. I tend to study diatoms by means of a polyphasic approach, with an emphasis on the methods of microbial culturing, molecular biology and bioinformatics, and spanning the levels of populations, species and communities. I am particularly interested in (1) how (cryptic) species diversity is generated (i.e., population genetics and speciation research), (2) how to disentangle it (i.e., species delimitation research), and (3) how species diversity is generated and maintained at the community level (i.e., community assembly and biogeographic research). Inevitably, these research questions bring me also to the edge of theoretical evolutionary biology, to the area called (4) the Species Problem, concerned with the intricate question of ‘What is a species?’
2023
Kollár J., Kopalová K., Kavan J., Vrbická K., Nývlt D., Nedbalová L., Stibal M. & Kohler T.J. (2023) Recently-formed Antarctic lakes host less diverse benthic bacterial and diatom communities than their older counterparts. FEMS Microbiology Ecology 99(9): fiad087. DOI: 10.1093/femsec/fiad087
2022
Kollár J., Poulíčková A. & Dvořák P. (2022) On the relativity of species, or the probabilistic solution to the species problem. Molecular Ecology 31: 411-418. DOI: 0.1111/mec.16218
2021
Kollár J., Pinseel E., Vyverman W. & Poulíčková A. (2021) A time-calibrated phylogeny provides an insight into the evolution, taxonomy and DNA barcoding of the Pinnularia subgibba group (Bacillariophyta). Fottea 21(1): 62-72. DOI: 10.5507/fot.2020.017
2019
Kollár J., Pinseel E., Vanormelingen P., Poulíčková A., Souffreau C., Dvořák P. & Vyverman W. (2019) A Polyphasic approach to the delimitation of diatom species: a case study for the genus Pinnularia (Bacillariophyta). Journal of Phycology 55, 365–379. DOI: 10.1111/jpy.12825
2018
Poulíčková A., Kollár J., Hašler P., Dvořák P. & Mann D.G. (2018) A new species Pinnularia lacustrigibba sp. nov. within the Pinnularia subgibba group (Bacillariophyceae). Diatom Research 33: 273–282. DOI: 10.1080/0269249X.2018.1513869
2015
Kollár J., Fránková M., Hašler P., Letáková M. & Poulíčková A. (2015) Epiphytic diatoms in lotic and lentic waters – diversity and representation of species complexes. Fottea 15(2): 259-271. DOI: 10.5507/fot.2015.022
Mgr. Eva Hejduková, Ph.D.
Researcher
My main research interests are the ecology, physiology, and life cycle of polar microalgae, in particular their freezing adaptations and ability to thrive in extreme polar environments. I contribute to field studies of freshwater polar diatoms, sea ice diatoms, and biological soil crusts in the Arctic to gain insight into their unique adaptations and interactions within their ecosystems. I also focus on eco-physiological experiments, mainly on diatoms, to understand their responses to environmental stressors and their contribution to ecosystem functioning.
2021
Hejduková E. & Nedbalová L. (2021) Experimental freezing of freshwater pennate diatoms from polar habitats. Protoplasma 258(6): 1213-1229. DOI: 10.1007/s00709-021-01648-8
Vonnahme T., Persson E., Dietrich U., Hejduková E., Dybwad C., Elster J., Chierici M. & Gradinger R. (2021) Early spring subglacial discharge plumes fuel under-ice primary production at a Svalbard tidewater glacier. The Cryosphere 15(4): 2083-2107. DOI: 10.5194/tc-15-2083-2021
2020
Hejduková E., Elster J. & Nedbalová L. (2020) Annual Cycle of Freshwater Diatoms in the High Arctic Revealed by Multiparameter Fluorescent Staining. Microbiology of Aquatic Systems 80: 559-572. DOI: 10.1007/s00248-020-01521-w
2019
Hejduková E., Pinseel E., Vanormelingen P., Nedbalová L., Elster J. & Vyverman W. (2019) Tolerance of pennate diatoms (Bacillariophyceae) to experimental freezing: comparison of polar and temperate strains. Phycologia 58: 382-392. DOI: 10.1080/00318884.2019.1591835
2017
Pinseel E., Hejduková E., Vanormelingen P., Kopalová K., Vyverman W. & Van de Vijver B. (2017) Pinnularia catenaborealis sp. nov. (Bacillariophyceae), a unique chain-forming diatom species from James Ross Island and Vega Island (Maritime Antarctica). Phycologia 56: 94-107. DOI: 10.2216/16-18.1
DiCE Lab Alumni
Petra Kociánová, BSc. 2023: Role of microbes in the decomposition in headwater streams
František Severa, BSc. 2023: Diatoms as bioindicators for tracking freshwater salinization
Jordan M. Bishop, Ph.D. 2020: Ecology and Taxonomy of limno-terrestrial diatoms from East Antarctica
Marie Bulínová, MSc. 2019: A comparison between paleo and recent freshwater diatom communities from Vega Island, Antarctica
Petra (Vinšová) Klímová, MSc. 2016: Taxonomy, diversity and ecology of freshwater diatom communities (Bacillariophyta) from moss habitats of Gough Island (southern Atlantic Ocean)
Lucie Hanišová, BSc. 2016: Biogeography and habitat preferences for genus Luticola