FN Archimer Export Format
PT J
TI When riverine dissolved organic matter (DOM) meets labile DOM in coastal waters: changes in bacterial community activity and composition
BT 
AF BLANCHET, Marine
   PRINGAULT, Olivier
   PANAGIOTOPOULOS, Christos
   LEFEVRE, Dominique
   CHARRIERE, Bruno
   GHIGLIONE, Jean-Francois
   FERNANDEZ, Camila
   APARICIO, Fran L.
   MARRASE, Celia
   CATALA, Philippe
   ORIOL, Louise
   CAPARROS, Jocelyne
   JOUX, Fabien
AS 1:1;2:2;3:3;4:3;5:3,5;6:1;7:1;8:4;9:4;10:1;11:1;12:1;13:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 UPMC Univ Paris 06, Sorbonne Univ, CNRS, Lab Oceanog Microbienne LOMIC,Observ Oceanol, F-66650 Banyuls Sur Mer, France.
   Univ Sci & Tech Languedoc Montpellier 2, Ecol Syst Marins Cotiers ECOSYM UMR5119, CNRS, UM2,UM1, F-34095 Montpellier 5, France.
   Univ Sud Toulon Var, Aix Marseille Univ, Mediterranean Inst Oceanog MIO, CNRS INSU IRD UM 110, F-13288 Marseille 09, France.
   Inst Ciencies Mar CSIC, Passeig Maritim Barceloneta 37, Barcelona 08003, Spain.
   Univ Perpignan, CEFREM, CNRS, UMR 5110, Bat U,Via Domitia UPVD, F-66860 Perpignan, France.
C2 UPMC UNIV PARIS 06, FRANCE
   UNIV MONTPELLIER, FRANCE
   UNIV TOULON, FRANCE
   INST CIENCIES MAR CSIC, SPAIN
   UNIV PERPIGNAN, FRANCE
UM MARBEC
IF 3.622
TC 35
UR https://archimer.ifremer.fr/doc/00625/73737/74701.pdf
LA English
DT Article
DE ;Dissolved organic matter;Biodegradation;Coastal waters;Bacterial community composition;Priming effect
AB Heterotrophic bacterial communities in marine environments are exposed to a heterogeneous mixture of dissolved organic compounds with different bioreactivity that may control both their activity and composition. The coastal environment is an example of a mixing area where recalcitrant allochthonous organic matter from rivers can encounter labile organic matter from marine phytoplanktonic blooms. The objective of this study was to explore the effects of mixed qualities of dissolved organic matter (DOM) on bacterial community activity (BCA) and bacterial community composition (BCC) and to test for a priming effect when DOM sources are added in combination. Coastal marine bacterial communities were incubated separately with a mixture of amino acids and with natural riverine DOM or with both sources together for 42 days. Addition of amino acids alone or in combination with riverine DOM led to a similar stimulation of BCA compared to control condition, whereas addition of riverine DOM alone did not modify BCA compared to the control. On the contrary, BCC analyzed by 16S rRNA gene pyrosequencing was not affected by the addition of amino acids alone, but changed dramatically with riverine DOM alone or in combination with amino acids. Our results show that changes in BCA and BCC can be driven by different types of DOM, but that these changes are not necessarily coupled. Moreover, the addition of labile DOM did not modify the microbial decomposition of riverine DOM, nor the BCC, suggesting that a priming effect did not occur under these experimental conditions.
PY 2017
PD JAN
SO Aquatic Sciences
SN 1015-1621
PU Springer Basel Ag
VL 79
IS 1
UT 000394107900003
BP 27
EP 43
DI 10.1007/s00027-016-0477-0
ID 73737
ER

EF