Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10409515" target="_blank" >RIV/00216208:11310/19:10409515 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7mLNlx6oVf" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7mLNlx6oVf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3389/fmicb.2019.01366" target="_blank" >10.3389/fmicb.2019.01366</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet
Popis výsledku v původním jazyce
Current research into bacterial dynamics on the Greenland Ice Sheet (GrIS) is biased toward cryoconite holes, despite this habitat covering less than 8% of the ablation (melt) zone surface. In contrast, the expansive surface ice, which supports wide-spread Streptophyte micro-algal blooms thought to enhance surface melt, has been relatively neglected. This study aims to understand variability in bacterial abundance and production across an ablation season on the GrIS, in relation to micro-algal bloom dynamics. Bacterial abundance reached 3.3 +/- 0.3 x 10(5) cells ml(-1) in surface ice and was significantly linearly related to algal abundances during the middle and late ablation periods (R-2 = 0.62, p < 0.05; R-2 = 0.78, p < 0.001). Bacterial production (BP) of 0.03-0.6 mu g C L(-1)h(-1) was observed in surface ice and increased in concert with glacier algal abundances, indicating that heterotrophic bacteria consume algal-derived dissolved organic carbon. However, BP remained at least 28 times lower than net primary production, indicating inefficient carbon cycling by heterotrophic bacteria and net accumulation of carbon in surface ice throughout the ablation season. Across the supraglacial environment, cryoconite sediment BP was at least four times greater than surface ice, confirming that cryoconite holes are the true "hot spots" of heterotrophic bacterial activity.
Název v anglickém jazyce
Bacterial Dynamics in Supraglacial Habitats of the Greenland Ice Sheet
Popis výsledku anglicky
Current research into bacterial dynamics on the Greenland Ice Sheet (GrIS) is biased toward cryoconite holes, despite this habitat covering less than 8% of the ablation (melt) zone surface. In contrast, the expansive surface ice, which supports wide-spread Streptophyte micro-algal blooms thought to enhance surface melt, has been relatively neglected. This study aims to understand variability in bacterial abundance and production across an ablation season on the GrIS, in relation to micro-algal bloom dynamics. Bacterial abundance reached 3.3 +/- 0.3 x 10(5) cells ml(-1) in surface ice and was significantly linearly related to algal abundances during the middle and late ablation periods (R-2 = 0.62, p < 0.05; R-2 = 0.78, p < 0.001). Bacterial production (BP) of 0.03-0.6 mu g C L(-1)h(-1) was observed in surface ice and increased in concert with glacier algal abundances, indicating that heterotrophic bacteria consume algal-derived dissolved organic carbon. However, BP remained at least 28 times lower than net primary production, indicating inefficient carbon cycling by heterotrophic bacteria and net accumulation of carbon in surface ice throughout the ablation season. Across the supraglacial environment, cryoconite sediment BP was at least four times greater than surface ice, confirming that cryoconite holes are the true "hot spots" of heterotrophic bacterial activity.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10618 - Ecology
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Frontiers in Microbiology
ISSN
1664-302X
e-ISSN
—
Svazek periodika
10
Číslo periodika v rámci svazku
July 2019
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
9
Strana od-do
1366
Kód UT WoS článku
000473576000001
EID výsledku v databázi Scopus
2-s2.0-85068960179