Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic reservoir

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F10%3A00340601" target="_blank" >RIV/60077344:_____/10:00340601 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic reservoir

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Importance of dissolved organic carbon for phytoplankton nutrition in a eutrophic reservoir

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Plankton Research

ISSN

0142-7873

e-ISSN

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Svazek periodika

32

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000274339900009

EID výsledku v databázi Scopus

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