Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10360625" target="_blank" >RIV/00216208:11310/17:10360625 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00248-016-0926-2" target="_blank" >http://dx.doi.org/10.1007/s00248-016-0926-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00248-016-0926-2" target="_blank" >10.1007/s00248-016-0926-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments

Popis výsledku v původním jazyce

The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Sondre Stromfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of sediments within the river delta. A long-term (12-month) incubation experiment was established using Watson River delta sediment under anaerobic conditions, with and without CO2/H-2 enrichment. Within CO2/H-2-amended incubations, sulphate depletion and a shift in the microbial community to a 52% predominance of Desulfosporosinus meridiei by day 371 provides evidence for sulphate reduction. We found evidence of methanogenesis in CO2/H-2-amended incubations within the first 5 months, with production rates of similar to 4 pmol g(-1) d(-1), which was likely performed by methanogenic Methanomicrobiales-and Methanosarcinales-related organisms. Later, a reduction in methane was observed to be paired with the depletion of sulphate, and we hypothesise that sulphate reduction out competed hydrogenotrophic methanogenesis. The structure and diversity of the original CO2/H-2-amended incubation communities changed dramatically with a major shift in predominant community members and a decline in diversity and cell abundance. These results highlight the need for further investigations into the fate of subglacial microbiota within downstream environments.

Název v anglickém jazyce

Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments

Popis výsledku anglicky

The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Sondre Stromfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of sediments within the river delta. A long-term (12-month) incubation experiment was established using Watson River delta sediment under anaerobic conditions, with and without CO2/H-2 enrichment. Within CO2/H-2-amended incubations, sulphate depletion and a shift in the microbial community to a 52% predominance of Desulfosporosinus meridiei by day 371 provides evidence for sulphate reduction. We found evidence of methanogenesis in CO2/H-2-amended incubations within the first 5 months, with production rates of similar to 4 pmol g(-1) d(-1), which was likely performed by methanogenic Methanomicrobiales-and Methanosarcinales-related organisms. Later, a reduction in methane was observed to be paired with the depletion of sulphate, and we hypothesise that sulphate reduction out competed hydrogenotrophic methanogenesis. The structure and diversity of the original CO2/H-2-amended incubation communities changed dramatically with a major shift in predominant community members and a decline in diversity and cell abundance. These results highlight the need for further investigations into the fate of subglacial microbiota within downstream environments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/GJ15-17346Y" target="_blank" >GJ15-17346Y: Světlé zítřky subglaciálních ekosystémů: Dopady odledňování na mikrobiální aktivitu a koloběh uhlíku pod ledovci</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Microbial Ecology

ISSN

0095-3628

e-ISSN

—

Svazek periodika

74

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

6-9

Kód UT WoS článku

000403255500002

EID výsledku v databázi Scopus

2-s2.0-85008698564