The Biogeochemical Legacy of Arctic Subglacial Sediments Exposed by Glacier Retreat
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10446301" target="_blank" >RIV/00216208:11310/22:10446301 - isvavai.cz</a>
Alternative codes found
RIV/60460709:41210/22:91205
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=PMEFdYiLhS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=PMEFdYiLhS</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2021GB007126" target="_blank" >10.1029/2021GB007126</a>
Alternative languages
Result language
angličtina
Original language name
The Biogeochemical Legacy of Arctic Subglacial Sediments Exposed by Glacier Retreat
Original language description
During past periods of advance, Arctic glaciers and ice sheets overrode soil, sediments, and vegetation and buried significant stores of organic matter (OM); these glaciers are now shrinking rapidly due to climate warming. Little is known about the biogeochemical processing of the OM buried beneath glacier ice which makes the processes associated with deglaciation difficult to predict. Subglacial sediments exposed at receding glacier fronts may represent a legacy of past biogeochemical processes. Here, we analyzed sediments from retreating fronts of 19 Arctic glaciers for their mineralogical and elemental composition, contents of major nutrients, OM biomarkers (aliphatic lipids and lignin-derived phenols), (14)C age, and microbial community structure. We show the character of the sediments is mostly determined by local glaciation history and bedrock lithology. Most subglacial sediments offer high amounts of readily bioavailable phosphorus (i.e., loose, labile, and Fe/Al P fractions) but lack readily accessible carbon substrates. The subglacial OM originated mainly from overridden terrestrial vascular plants. The results of OM biomarker analysis and (14)C dating suggest the OM substrates degrade in the subglacial environment and are reworked by the resident microbial communities. We argue the biogeochemical legacy of the perishing subglacial environments is an important determinant for the early processes of proglacial ecological succession.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10618 - Ecology
Result continuities
Project
<a href="/en/project/GA18-12630S" target="_blank" >GA18-12630S: Microbial methane oxidation in subglacial ecosystems: An unknown methane sink under glaciers and ice sheets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Global Biogeochemical Cycles
ISSN
0886-6236
e-ISSN
1944-9224
Volume of the periodical
36
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
24
Pages from-to
e2021GB007126
UT code for WoS article
000776570700001
EID of the result in the Scopus database
2-s2.0-85127249703