Nitrogen fixation and diurnal changes of photosynthetic activity in Arctic soil crusts at different development stage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43896010" target="_blank" >RIV/60076658:12310/17:43896010 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60077344:_____/17:00474587 RIV/67985939:_____/17:00474587

Výsledek na webu

<a href="https://ac.els-cdn.com/S1164556317300742/1-s2.0-S1164556317300742-main.pdf?_tid=add453d0-04ca-11e8-9448-00000aab0f6b&acdnat=1517213106_3a097748a67d92e532858dd65b340e4b" target="_blank" >https://ac.els-cdn.com/S1164556317300742/1-s2.0-S1164556317300742-main.pdf?_tid=add453d0-04ca-11e8-9448-00000aab0f6b&acdnat=1517213106_3a097748a67d92e532858dd65b340e4b</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ejsobi.2017.02.002" target="_blank" >10.1016/j.ejsobi.2017.02.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nitrogen fixation and diurnal changes of photosynthetic activity in Arctic soil crusts at different development stage

Popis výsledku v původním jazyce

Nitrogen fixation and photosynthesis provided by microbial phototrophs (cyanobacteria and eukaryotic microalgae) are important processes occurring in Arctic soil crusts. Here, we describe and compare these processes in biological soil crusts from Central Svalbard at different stages of development. The gradient from poorly-developed to well-developed soil crusts was accompanied by the changes in biovolume of microbial phototrophs, nitrogenase and photosynthetic activity. The lowest biovolume of microbial phototrophs was detected in poorly-developed soil crusts as a consequence of the initial stage of soil colonization. The biovolume initially increased during the soil crust development but decreased in well developed lichenized soil crusts. However, nitrogenase activity decreased from poorly to more developed soil crusts. Diurnal courses of photosynthetic activity differed among the soil crust types showing shifts in diurnal minima and maxima; the poorly-developed soil crust reacted faster to changes in temperature and PAR. In spite of different microclimatic conditions during the measurements, temperature was the main factor influencing photosynthetic activity while the effect of PAR was not significant. Higher temperatures led to inhibition of photosynthetic activity and increased energy dissipation, indicating acclimation/adaptation of the soil crust photosynthetic microorganisms to a cold environment.

Název v anglickém jazyce

Nitrogen fixation and diurnal changes of photosynthetic activity in Arctic soil crusts at different development stage

Popis výsledku anglicky

Nitrogen fixation and photosynthesis provided by microbial phototrophs (cyanobacteria and eukaryotic microalgae) are important processes occurring in Arctic soil crusts. Here, we describe and compare these processes in biological soil crusts from Central Svalbard at different stages of development. The gradient from poorly-developed to well-developed soil crusts was accompanied by the changes in biovolume of microbial phototrophs, nitrogenase and photosynthetic activity. The lowest biovolume of microbial phototrophs was detected in poorly-developed soil crusts as a consequence of the initial stage of soil colonization. The biovolume initially increased during the soil crust development but decreased in well developed lichenized soil crusts. However, nitrogenase activity decreased from poorly to more developed soil crusts. Diurnal courses of photosynthetic activity differed among the soil crust types showing shifts in diurnal minima and maxima; the poorly-developed soil crust reacted faster to changes in temperature and PAR. In spite of different microclimatic conditions during the measurements, temperature was the main factor influencing photosynthetic activity while the effect of PAR was not significant. Higher temperatures led to inhibition of photosynthetic activity and increased energy dissipation, indicating acclimation/adaptation of the soil crust photosynthetic microorganisms to a cold environment.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40104 - Soil science

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

European Journal of Soil Biology

ISSN

1164-5563

e-ISSN

—

Svazek periodika

79

Číslo periodika v rámci svazku

MAR-APR 2017

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

10

Strana od-do

21-30

Kód UT WoS článku

000399851100003

EID výsledku v databázi Scopus

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