Permafrost as a source of mineral weathering bacteria: Implications of active layer thickening on James Ross Island, Antarctica
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00140477" target="_blank" >RIV/00216224:14310/25:00140477 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0341816224008919" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0341816224008919</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.catena.2024.108694" target="_blank" >10.1016/j.catena.2024.108694</a>
Alternative languages
Result language
angličtina
Original language name
Permafrost as a source of mineral weathering bacteria: Implications of active layer thickening on James Ross Island, Antarctica
Original language description
Studying permafrost in Antarctica provides insights into climate history, soil and rock structure, and a unique biodiversity with potential impact on ecosystems. Although a great deal of effort has been devoted to the microbiological composition of permafrost soils, the objective pursued in this study is, for the first time, to examine soil and rock samples collected from a 350 cm deep core drilled near the Johann Gregor Mendel Czech Antarctic Station on the Ulu Peninsula of James Ross Island, to study the effect of geochemical properties on microbial composition and diversity and vice versa. We collected samples from the profile starting on the ground surface down to 350 cm depth and correlated information from metagenomic 16S rRNA gene analysis and geochemical data. The 80-cm-thick active layer had a distinct bacterial composition different from the Pseudomonadota-rich permafrost layer, with Actinomycetota, Acidobacteriota, Chloroflexota, and Verrucomicrobiota being the prevalent phyla. Throughout the core, the higher bacterial diversity was positively associated with the sand fraction and intensive weathering. The highest identified diversity in the deepest part of the active layer (transient active layer) suggests that the bacteria here have been gradually cryopreserved, possibly accumulating from the upper layers. In summary, the identified interface between the active layer and permafrost, as well as the transition within the permafrost from Holocene marine sediments to underlying Cretaceous sedimentary rocks (deeper than ∼ 260 cm), had the greatest influence on the bacterial composition. Decadal records of soil temperature and active layer thickness predict more significant interactions in the future between bacterial communities in the current active layer and mineral weathering bacteria that are typical of permafrost.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
CATENA
ISSN
0341-8162
e-ISSN
1872-6887
Volume of the periodical
249
Issue of the periodical within the volume
February
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
1-10
UT code for WoS article
001401384900001
EID of the result in the Scopus database
2-s2.0-85213845273