Photosynthetic activity of Arctic Vaucheria (Xanthophyceae) measured in microcosmos

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43896752" target="_blank" >RIV/60076658:12310/17:43896752 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/17:00480586

Výsledek na webu

<a href="http://www.sci.muni.cz/CPR/13cislo/Kviderova2017-web.pdf" target="_blank" >http://www.sci.muni.cz/CPR/13cislo/Kviderova2017-web.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5817/CPR2017-1-6" target="_blank" >10.5817/CPR2017-1-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photosynthetic activity of Arctic Vaucheria (Xanthophyceae) measured in microcosmos

Popis výsledku v původním jazyce

The xanthophycean alga Vaucheria inhabits very variable, and hence extreme, ecosystem of polar river estuaries. Therefore, it represents a unique system for the study of adaptation/acclimatization mechanisms. Since the ecophysiological measurements cannot be performed in the field directly, a piece of Vaucheria community collected in the Adventelva estuary, Longyearbyen, Svalbard, was taken to a microcosmos in order to study it. The set of instrumentation for measurement of ecophysiological parameters was constructed for such a field study. The community structure and photosynthetic activity expressed as the dissolved oxygen concentration and effective quantum yield (and hence relative electron transfer rate) were measured. The study defined relations between encountered environmental conditions and Vaucheria photosynthetic activity in late Arctic summer. The community consisted almost entirely of Vaucheria thalli; small marine pennate diatoms were rare. The microcosmos was proved functional since the structure of the community remained unaffected. Both methods of photosynthetic activity measurement were able to record its diel changes during 10 days lasting incubation. Although only weak correlation was found between the oxygen concentration and variable chlorophyll, probably due to the time necessary for oxygen diffusion, data from fluorometers were highly correlated. The Vaucheria expressed diel cycles in the photosynthetic activity, and the photosynthetically active radiation was the main driving factor. The incubation in microcosmos proved to be suitable for ecophysiological studies which will include the addition of tidal cycles and more sophisticated protocols for photosynthetic activity measurement.

Název v anglickém jazyce

Photosynthetic activity of Arctic Vaucheria (Xanthophyceae) measured in microcosmos

Popis výsledku anglicky

The xanthophycean alga Vaucheria inhabits very variable, and hence extreme, ecosystem of polar river estuaries. Therefore, it represents a unique system for the study of adaptation/acclimatization mechanisms. Since the ecophysiological measurements cannot be performed in the field directly, a piece of Vaucheria community collected in the Adventelva estuary, Longyearbyen, Svalbard, was taken to a microcosmos in order to study it. The set of instrumentation for measurement of ecophysiological parameters was constructed for such a field study. The community structure and photosynthetic activity expressed as the dissolved oxygen concentration and effective quantum yield (and hence relative electron transfer rate) were measured. The study defined relations between encountered environmental conditions and Vaucheria photosynthetic activity in late Arctic summer. The community consisted almost entirely of Vaucheria thalli; small marine pennate diatoms were rare. The microcosmos was proved functional since the structure of the community remained unaffected. Both methods of photosynthetic activity measurement were able to record its diel changes during 10 days lasting incubation. Although only weak correlation was found between the oxygen concentration and variable chlorophyll, probably due to the time necessary for oxygen diffusion, data from fluorometers were highly correlated. The Vaucheria expressed diel cycles in the photosynthetic activity, and the photosynthetically active radiation was the main driving factor. The incubation in microcosmos proved to be suitable for ecophysiological studies which will include the addition of tidal cycles and more sophisticated protocols for photosynthetic activity measurement.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

<a href="/cs/project/LM2015078" target="_blank" >LM2015078: Česká polární výzkumná infrastruktura</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Czech Polar Reports

ISSN

1805-0689

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

52-61

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—