FN Archimer Export Format
PT J
TI Intra- and inter-spatial variability of meiofauna in hadal trenches is linked to microbial activity and food availability
BT 
AF Shimabukuro, Mauricio
   Zeppilli, Daniela
   Leduc, D.
   Wenzhöfer, F.
   Berg, P.
   Rowden, A. A.
   Glud, R. N.
AS 1:1,2;2:1;3:3;4:2,4;5:5;6:3,6;7:2,7,8;
FF 1:PDG-REM-EEP-LEP;2:PDG-REM-BEEP-LEP;3:;4:;5:;6:;7:;
C1 Laboratoire Environnement Profond, REM/EEP, Institut Français de Recherche Pour L’Exploitation de La Mer, ZI de La Pointe du Diable, CS 10070, 29280, Plouzané, France
   Department of Biology, HADAL & Nordcee, University of Southern Denmark, Campusvej 55, 5230, Odense, Denmark
   National Institute of Water and Atmospheric Research, Wellington, New Zealand
   Helmholtz Centre for Polar and Marine Research, Alfred-Wegener Institute, Bremerhaven, Germany
   Department of Environmental Sciences, University of Virginia, 291 McCormick road, Charlottesville, VA, 22904-4123, USA
   Victoria University of Wellington, Wellington, New Zealand
   Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark
   Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
C2 IFREMER, FRANCE
   UNIV SOUTHERN DENMARK, DENMARK
   NIWA, NEW ZEALAND
   INST A WEGENER, GERMANY
   UNIV VIRGINIA, USA
   UNIV WELLINGTON VICTORIA, NEW ZEALAND
   UNIV SOUTHERN DENMARK, DENMARK
   UNIV TOKYO, JAPAN
SI BREST
SE PDG-REM-EEP-LEP
   PDG-REM-BEEP-LEP
UM BEEP-LM2E
IN WOS Ifremer UMR
   DOAJ
   copubli-europe
   copubli-int-hors-europe
IF 4.6
TC 4
UR https://archimer.ifremer.fr/doc/00757/86853/92353.pdf
   https://archimer.ifremer.fr/doc/00757/86853/92354.pdf
LA English
DT Article
AB Hadal trenches are depocenters for organic material, and host intensified benthic microbial activity. The enhanced deposition is presumed to be reflected in elevated meiofaunal standing-stock, but available studies are ambiguous. Here, we investigate the distribution of meiofauna along the Atacama Trench axis and adjacent abyssal and bathyal settings in order to relate the meiofauna densities to proxies for food availability. Meiofauna densities peaked at the sediment surface and attenuated steeply with increasing sediment depth. The distribution mirrored the vertical profile of the microbial-driven oxygen consumption rate demonstrating a close linkage between microbial activity and meiofauna density. Meiofaunal standing-stock along the trench axis varied by a factor of two, but were markedly higher than values from the abyssal site at the oceanic plate. Overall, meiofaunal densities poorly correlated with common proxies for food availability such as total organic carbon and phytopigments, but strongly correlated with the microbial benthic O2 consumption rate. We argue that microbial biomass likely represents an important meiofaunal food source for hadal meiofauna. Observations from three trench systems underlying surface water of highly different productivity confirmed elevated meiofaunal densities at the trench axis as compared to abyssal sites on oceanic plates. Food availability appear to drive elevated abundance and variations in meiofauna densities in hadal sediments. 
PY 2022
PD MAR
SO Scientific Reports
SN 2045-2322
PU Springer Science and Business Media LLC
VL 12
IS 1
UT 000769065000044
DI 10.1038/s41598-022-08088-1
ID 86853
ER

EF