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Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic reservoir
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SYSNO ASEP 0340601 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic reservoir Tvůrce(i) Znachor, Petr (BC-A) RID, ORCID
Nedoma, Jiří (BC-A) RID, ORCIDZdroj.dok. Journal of Plankton Research - ISSN 0142-7873
Roč. 32, č. 3 (2010), s. 367-376Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova mixotrophy ; phytoplankton ; PDMPO ; DOC ; autoradiography ; diatoms Vědní obor RIV DA - Hydrologie a limnologie CEP GP206/07/P407 GA ČR - Grantová agentura ČR GA206/06/0462 GA ČR - Grantová agentura ČR GA206/05/0007 GA ČR - Grantová agentura ČR 1QS600170504 GA AV ČR - Akademie věd CEZ AV0Z60170517 - HBU-Z, BC-A (2005-2011) UT WOS 000274339900009 DOI 10.1093/plankt/fbp129 Anotace We performed 4 experiments with size fractionated phytoplankton organic C uptake in a eutrophic Římov Reservoir. Samples from surface and euphotic depth were incubated at in situ depths in light and dark bottles arrangement with 3H amino acids and glucose. Moreover, we measured silica deposition and chlorophyll content in diatom cells without and with glucose. Phytoplankton uptake of both substrates was low regardless the incubation depth. Thus, mixotrophic nutrition of the phytoplankton was of low importance under natural conditions. However, glucose addition in micromolar concentrations resulted in asignificant increase in diatom silification rates in a light bottle variant. Interestingly, chlorophyll fluorescence in diatom cells markedly decreased after the glucose addition indicating a potential restructuring of cell metabolism to benefit from a remarkably high concentration of available organic C in the environment. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2010
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