doc. Ing. Josef Hejzlar, CSc.

Job Position: Senior scientist - Department of Hydrochemistry and Ecosystem Modelling (HEM)

Contact details

Phone: 420387775876
E-mail: hejzlar@hbu.cas.cz
Room: 323NB

Description

Limnology of lakes and reservoirs, mainly cycles of nutrients (carbon, nitrogen, phosphorus, sulphur etc.), eutrophication, material transport from the catchment in surface waters and mathematical modelling of hydrodynamics and water quality in water bodies

Curriculum vitae

Born: 1956 in Liberec, the Czech Republic
 
Education:
Master of Sciences, 1980, Institute of Chemical Technology in Prague. Emphasis on water technology and water analysis.
Doctor of Philosophy (PhD), 1985, Institute of Chemical Technology in Prague. Emphasis on water and environmental chemistry. Dissertation title: "Analysis of the high molecular weight dissolved organic substances produced by microorganisms of the activated sludge."
Habilitation, 2003, University of South Bohemia in České Budějovice. Thesis title: "Phosphorus cycling in the reservoir ecosystem"
 
Professional experience:
Institute of Landscape Ecology CAS, since April 1, 1990, Hydrobiological Institute CAS
1985-1992, research scientist, member of hydrochemical laboratory
Since 1993, senior scientist, member of hydrochemical laboratory
1998- 2015, head of the Department of Hydrochemistry and Ecosystem Modelling
Since 1995, Faculty of Science, University of South Bohemia in České Budějovice, a part-time contract as assistant or associated professor
 
Projects:
Principal investigator or co-investigator of 12 national projects (GACR, GAAVCR, MSMT-COST, MZe-NAZV) and participation in 2 EU projects focused on modeling the global and local impacts in aquatic and terrestrial ecosystems (EUROHARP, REFRESH)

Teaching Ecological management of reservoirs (KBE/471), Element cycles and processes in the catchment (KBE/469), Special limnology (KBE/465)
University of South Bohemia in České Budějovice, Faculty of Science
Description:

Tématika výuky zahrnuje limnologické a hydrochemické aspekty ekologie jezer a umělých nádrží, např. koloběhy živin (C, N, P, S), organické hmoty (primární produkce, humusové látky) a dalších prvků (Si, Fe, Mn, Al) v ekosystému "povodí - nádrž/jezero" a vododohospodářské řízení množství a kvality vody v nádržích.

Teaching topics include limnological and hydrochemical aspects of ecology of lakes and artificial reservoirs, e.g. cycles of nutrients (C, N, P, S), organic matter (primary production, humic substances) and other elements (Si, Fe, Mn, Al) in the ecosystem "catchment - reservoir/lake" and water management of the quantity and quality of water in reservoirs.



Publications
Total found: 249 records
Fott J., Nedbalová L., Brabec M., Kozáková R., Řeháková K., Hejzlar J., Šorf M., Vrba J. (2022) Light as a controlling factor of winter phytoplankton in a monomictic reservoir. Limnologica 95 : 125995.
DOI: 10.1016/j.limno.2022.125995
Golub M., Thiery W., Marcé R., Pierson D., Vanderkelen I. ......, Hejzlar J. (2022) A framework for ensemble modelling of climate change impacts on lakes worldwide: the ISIMIP Lake Sector. Geoscientific Model Development 15 : 4597–4623.
DOI: 10.5194/gmd-15-4597-2022
Hejzlar J., Blabolil P., Čtvrtlíková M., Jůza T., Kasalický V., Kubečka J., Seďa J., Znachor P. (2022) Účinnost biomanipulace pro řízení vodního ekosystému a kvality vody ve vodárenských nádržích? [Biomanipulation efficiency for the control of aquatic ecosystem and water quality in water supply reservoirs?] Proc. Conf. Water Supply Biology 2022 147-156.
Petrusek A., Hejzlar J. (2022) Když se ryby dusí aneb Příčiny a důsledky úbytku kyslíku ve vodách. [When fish suffocate or Causes and consequences of oxygen depletion in waters.] Živa 2 : 75-77.
Schmidt S., Hejzlar J., Kopáček J., Mercado M., Porcal P., Vystavna Y., Lanta V. (2022) Forest damage and subsequent recovery alter the water composition in mountain lake catchments. Science of the Total Environment 827 : 154293.
DOI: 10.1016/j.scitotenv.2022.154293 0048-9697
Wade A., Skeffington R.A., Couture R.M., Lampa M.E., Groot S., Halliday S.J., Harezlak V., Hejzlar J., Jackson-Blake L., Lepistö A., Papastergiadou E., Riera J.L., Rankinen K., Shahgedanova M., Trolle D., Whitehead P.G., Psaltopoulos D., Skuras D. (2022) Land use change to reduce freshwater nitrogen and phosphorus will be effective even with projected climate change. Water 14 : 829.
DOI: 10.3390/w14050829
Blabolil P., Harper L.R., Říčanová Š., Sellers G., Di Muri C., Jůza T., Vašek M., Sajdlová Z., Rychtecký P., Znachor P., Hejzlar J., Peterka J., Hänfling B. (2021) Environmental DNA metabarcoding uncovers environmental correlates of fish communities in spatially heterogeneous freshwater habitats. Ecological Indicators 126 : 107698.
DOI: 10.1016/j.ecolind.2021.107698
Čtvrtlíková M., Krolová M., Kučerová A., Hejzlar J., Hladík M., Kubečka J. (2021) Zlepšování ekologického potenciálu a kvality vody v nádržích pomocí plovoucích vegetačních ostrovů. [Improving the ecological potential and water quality in reservoirs using floating vegetation islands.] Sborník konference Vodárenská biologie 187–193.
Doubek J.P., Anneville O., Dur G., Lewandowska A.M., Patil V.P., Rusak J., Salmaso N., Seltmann C.T. , Straile D., Urrutia-Cordero P., Venail P., Adrian R., Alfonso M.B., DeGasperi C.L., De Eyto E., Feuchtmayr H., Gaiser E.E., Girdner S.F., Graham J.L., Grossart H., Hejzlar J., Jacquet S., Kirillin G., Llames M.E., Matsuzaki S.I.S., Nodine E.R., Piccolo M.C., Pierson D., Rimmer A., Rudstam L.G. , Sadro S., Swain H.M., Thackeray S., Thiery W., Verburg P., Zohary T. , Stockwell J. (2021) The extent and variability of storm-induced temperature changes in lakes measured with long-term and high-frequency data. Limnology and Oceanography 66 : 1979-1992.
DOI: 10.1002/lno.11739
Holubová M., Hejzlar J., Čech M., Vašek M., Blabolil P., Peterka J. (2021) Fluctuations in pelagic fish density linked to ambient conditions. Journal of Fish Biology 98 : 756-767.
DOI: 10.1111/jfb.14622
Hrycik A.R., Isles P.D.F., Adrian R., Albright M., Bacon L.C., Berger S.A., Bhattacharya R., Grossart H., Hejzlar J., Hetherington A.L., Knoll L.B., Laas A., McDonald C.P., Merrell K., Nejstgaard J.C., Nelson K., Nõges P., Paterson A.M., Pilla R.M., Robertson D.M., Rudstam L.G. , Rusak J., Sadro S., Silow E.A., Stockwell J., Yao H., Yokota K., Pierson D. (2021) Earlier winter/spring runoff and snowmelt during warmer winters lead to lower summer chlorophyll-a in north temperate lakes. Global Change Biology 27 : 4615-4629.
DOI: 10.1111/gcb.15797
Jane S.F., Hansen G.J.A., Kraemer B.M., Leavitt P., Mincer J.L., North R.L., Pilla R.M., Stetler J.T., Williamson C.E., Woolway R., Arvola L., Chandra S., DeGasperi C.L., Diemer L., Dunalska J., Erina O., Flaim G., Grossart H., Hambright K.D., Hein C., Hejzlar J., Janus L.L., Jenny J.P., Jones J.R., Knoll L.B., Leoni B., Mackay E., Matsuzaki S.I.S., McBride C., Müller-Navarra D.C., Paterson A.M., Pierson D., Rogora M., Rusak J., Sadro S., Saulnier-Talbot E., Schmid M., Sommaruga R., Thiery W., Verburg P., Weathers K.C., Weyhenmeyer G., Yokota K., Rose K.C. (2021) Widespread deoxygenation of temperate lakes. Nature 594 : 66-70.
DOI: 10.1038/s41586-021-03550-y
Kopáček J., Hejzlar J., Porcal P., Znachor P. (2021) Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin. Biogeochemistry 154 : 81–98.
DOI: 10.1007/s10533-021-00800-z
Schmidt S., Hejzlar J., Kopáček J., Paule-Mercado M., Porcal P., Vystavna Y. (2021) Relationships between a catchment-scale forest disturbance index, time delays, and chemical properties of surface water. Ecological Indicators 125 : 107558.
DOI: 10.1016/j.ecolind.2021.107558
Shabarova T., Salcher M., Porcal P., Znachor P., Nedoma J., Grossart H., Seďa J., Hejzlar J., Šimek K. (2021) Recovery of freshwater microbial communities after extreme rain events is mediated by cyclic succession. Nature Microbiology 6 : 479–488.
DOI: 10.1038/s41564-020-00852-1
Vašek M., Souza A., Říha M., Kubečka J., Znachor P., Hejzlar J. (2021) Stable isotope evidence from archived fish scales indicates carbon cycle changes over the four-decade history of the Římov Reservoir (Czechia). Science of the Total Environment 755 : 142550.
DOI: doi.org/10.1016/j.scitotenv.2020.142550
Vystavna Y., Mercado M., Juras R., Schmidt S., Kopáček J., Hejzlar J., Huneau F. (2021) Effect of snowmelt on the dynamics, isotopic and chemical composition of runoff in mature and regenerated forested catchments. Journal of Hydrology 598 : 126437.
DOI: 10.1016/j.jhydrol.2021.126437
Čtvrtlíková M., Kučerová A., Krolová M., Znachor P., Hejzlar J., Matěna J., Muška M., Kubečka J., Hladík M. (2020) Vodní makrofyta umělých plovoucích ostrovu v nádržích České republiky. [Aquatic macrophytes of artificial floating islands in the reservoirs of the Czech Republic.] book 108pp.
Ersoy Z., Scharfenberger U., Baho D.L., Bucak T., Feldmann T., Hejzlar J., Levi E.E., Mahdy A., Nõges T., Papastergiadou E., Stefanidis K., Šorf M., Søndergaard M., Trigal C., Jeppesen E. , Beklioglu M. (2020) Impact of nutrients and water level changes on submerged macrophytes along a temperature gradient: A pan-European mesocosm experiment. Global Change Biology 26 : 6831–6851.
DOI: doi.org/10.1111/gcb.15338
Kopáček J., Bače R., Hejzlar J., Kaňa J., Kučera T., Matějka K., Porcal P., Turek J. (2020) Changes in microclimate and hydrology in an unmanaged mountain forest catchment after insect-induced tree dieback Science of the Total Environment 720 : 137518.
DOI: 10.1016/j.scitotenv.2020.137518

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CONTACT

Biology Centre CAS
Institute of Hydrobiology
Na Sádkách 702/7
370 05 České Budějovice

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