FN Archimer Export Format
PT J
TI Time-scales of hydrological forcing on the geochemistry and bacterial community structure of temperate peat soils
BT 
AF NUNES, Flavia
   AQUILINA, Luc
   DE RIDDER, Jo
   FRANCEZ, Andre-Jean
   QUAISER, Achim
   CAUDAL, Jean-Pierre
   VANDENKOONHUYSE, Philippe
   DUFRESNE, Alexis
AS 1:1,2,3;2:2;3:2;4:3;5:3;6:2;7:3;8:3;9:;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 IUEM, UEB, UBO, LEMAR UMR CNRS UBO IRD Ifremer 6539,Lab Sci Envir, F-29280 Plouzane, France
   Univ Rennes 1, CNRS, UMR6118 Geosci, Rennes, France
   Univ Rennes 1, CNRS, UMR6553 ECOBIO, Rennes, France
C2 UBO, FRANCE
   UNIV RENNES, FRANCE
   UNIV RENNES, FRANCE
UM LEMAR
IN DOAJ
IF 5.228
TC 11
UR https://archimer.ifremer.fr/doc/00285/39668/42793.pdf
   https://archimer.ifremer.fr/doc/00285/39668/42808.pdf
LA English
DT Article
AB Peatlands are an important global carbon reservoir. The continued accumulation of carbon in peatlands depends on the persistence of anoxic conditions, in part induced by water saturation, which prevents oxidation of organic matter, and slows down decomposition. Here we investigate how and over what time scales the hydrological regime impacts the geochemistry and the bacterial community structure of temperate peat soils. Peat cores from two sites having contrasting groundwater budgets were subjected to four controlled drought-rewetting cycles. Pore water geochemistry and metagenomic profiling of bacterial communities showed that frequent water table drawdown induced lower concentrations of dissolved carbon, higher concentrations of sulfate and iron and reduced bacterial richness and diversity in the peat soil and water. Short-term drought cycles (3–9 day frequency) resulted in different communities from continuously saturated environments. Furthermore, the site that has more frequently experienced water table drawdown during the last two decades presented the most striking shifts in bacterial community structure, altering biogeochemical functioning of peat soils. Our results suggest that the increase in frequency and duration of drought conditions under changing climatic conditions or water resource use can induce profound changes in bacterial communities, with potentially severe consequences for carbon storage in temperate peatlands.
PY 2015
PD OCT
SO Scientific Reports
SN 2045-2322
PU Nature Publishing Group
VL 5
IS 14612
UT 000362254700001
BP 1
EP 11
DI 10.1038/srep14612
ID 39668
ER

EF