FN Archimer Export Format
PT J
TI Metagenome-assembled genomes of deep-sea sediments: changes in microbial functional potential lag behind redox transitions
BT 
AF Schauberger, Clemens
   Thamdrup, Bo
   Lemonnier, Clarisse
   Trouche, Blandine
   Poulain, Julie
   Wincker, Patrick
   Arnaud-Haond, Sophie
   Glud, Ronnie N
   Maignien, Lois
AS 1:1;2:1;3:2;4:2;5:3,4;6:3,4;7:5;8:1,6;9:2;
FF 1:;2:;3:;4:;5:;6:;7:PDG-RBE-MARBEC-LEGPM;8:;9:;
C1 Department of Biology, University of Southern Denmark , 5230 Odense M, Denmark
   Univ Brest, CNRS, IFREMER, Microbiology of Extreme Environments Laboratory , F-29280 Plouzané, France
   Génomique Métabolique , Genoscope, Evry, France
   Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay , Genoscope, Evry, France
   MARBEC, Institut Français de Recherche pour L'Exploitation de la Mer, Univ Montpellier, CNRS, IRD , Sète, France
   Department of Ocean and Environmental Sciences, Tokyo University of Marine Science and Technology , Tokyo, Japan
C2 UNIV SOUTHERN DENMARK, DENMARK
   UBO, FRANCE
   GENOSCOPE, FRANCE
   UNIV PARIS SACLAY, FRANCE
   IFREMER, FRANCE
   UNIV TOKYO, JAPAN
SI SETE
SE PDG-RBE-MARBEC-LEGPM
UM BEEP-LM2E
   MARBEC
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
TC 0
UR https://archimer.ifremer.fr/doc/00871/98285/107643.pdf
   https://archimer.ifremer.fr/doc/00871/98285/108281.docx
LA English
DT Article
DE ;microbial ecology;geomicrobiology;marine sediments;hadal zone;metagenomics;redox gradients;biogeochemistry;CAZymes
AB Hadal sediments are hotspots of microbial activity in the deep-sea and exhibit strong biogeochemical gradients. But while these gradients are widely assumed to exert selective forces on hadal microbial communities, the actual relationship between biogeochemistry, functional traits, and microbial community structure remains poorly understood. We tested whether the biogeochemical conditions in hadal sediments select for microbes based on their genomic capacity for respiration and carbohydrate utilization via a metagenomic analysis of over 153 samples from the Atacama Trench region (max. Depth 8085 m). The obtained 1357 non-redundant microbial genomes were affiliated with about one third of all known microbial phyla, with more than half belonging to unknown genera. This indicated that the capability to withstand extreme hydrostatic pressure is a phylogenetically widespread trait and that hadal sediments are inhabited by diverse microbial lineages. While community composition changed gradually over sediment depth, these changes were not driven by selection for respiratory or carbohydrate degradation capability in the oxic and nitrogenous zones, except in the case of anammox bacteria and nitrifying archaea. However, selection based on respiration and carbohydrate degradation capacity did structure the communities of the ferruginous zone, where aerobic and nitrogen respiring microbes declined exponentially (half-life 125–419 years) and were replaced by subsurface communities. These results highlight a delayed response of microbial community composition to selective pressure imposed by redox zonation and indicated that gradual changes in microbial composition are shaped by the high-resilience and slow growth of microbes in the seafloor. 
PY 2024
PD JAN
SO Isme Communications
SN 2730-6151
PU Oxford University Press (OUP)
VL 4
IS 1
UT 001150217000001
DI 10.1093/ismeco/ycad005
ID 98285
ER

EF