FN Archimer Export Format
PT J
TI Coastal waters freshening and extreme seasonality affect organic matter sources, quality, and transfers in a High Arctic fjord (Young Sound, Greenland)
BT 
AF BRIDIER, Guillaume
   MEZIANE, Tarik
   GRALL, Jacques
   CHAUVAUD, Laurent
   SEJR, Mikael Kristian
   MENNETEAU, Sylvain
   OLIVIER, Frederic
AS 1:1;2:2;3:1,3;4:7;5:4,5;6:1,2;7:2,6;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 UBO, Lab Sci Environm Marin LEMAR, UMR 6539, IRD,Ifremer,CNRS, Rue Dumont DUrville, F-29280 Plouzane, France.
   UCN, Biol Organismes & Ecosyst Aquat BOREA, UMR 7208, MNHN,IRD,SU,CNRS,UA, 61 Rue Buffon CP53, F-75005 Paris, France.
   Inst Univ Europeen Mer, Observ Marin, UMS 3113, Rue Dumont DUrville, F-29280 Plouzane, France.
   Aarhus Univ, Arctic Res Ctr, Ny Munkegade Bldg 1540, DK-8000 Aarhus C, Denmark.
   Aarhus Univ, Dept BioSci, Vejlsovej 25, DK-8600 Silkeborg, Denmark.
   Museum Natl Hist Nat, Stn Marine Concarneau, Pl Croix, F-29900 Concarneau, France.
C2 UBO, FRANCE
   UCN, FRANCE
   UBO, FRANCE
   UNIV AARHUS, DENMARK
   UNIV AARHUS, DENMARK
   MNHN, FRANCE
   CNRS, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.326
TC 6
UR https://archimer.ifremer.fr/doc/00492/60318/63741.pdf
   https://archimer.ifremer.fr/doc/00492/60318/67180.pdf
LA English
DT Article
DE ;Arctic ecosystems;Benthic-pelagic coupling;Organic matter;Climate change;Fatty acids;Stable isotopes;Young Sound
AB Arctic benthic ecosystems are expected to experience strong modifications in the dynamics of primary producers and/or benthic-pelagic coupling under climate change. However, lack of knowledge about the influence of physical constraints (e.g. ice-melting associated gradients) on organic matter sources, quality, and transfers in systems such as fjords can impede predictions of the evolution of benthic-pelagic coupling in response to global warming. Here, sources and quality of particulate organic matter (POM) and sedimentary organic matter (SOM) were characterized along an inner-outer gradient in a High Artic fjord (Young Sound, NE Greenland) exposed to extreme seasonal and physical constraints (ice-melting associated gradients). The influence of the seasonal variability of food sources on 2 dominant filter-feeding bivalves (Astarte moerchi and Mya truncata) was also investigated. Results revealed the critical impact of long sea ice/snow cover conditions prevailing in Young Sound corresponding to a period of extremely poor and degraded POM and SOM. Freshwater inputs had a very local impact during summer, with relatively more degraded POM at the surface compared to bottom waters that were less nutritionally depleted but more heterogeneous among the sampled stations. Terrestrial inputs contributed to the SOM composition but showed a large variability along the fjord. Finally, diet analyses underlined the contrasted nutritional conditions, showing much higher lipid reserves in A. moerchi than in M. truncata during winter. Under a scenario with increased freshwater input, such results suggest a decline in organic matter quality and production in Young Sound, with subsequent impacts on benthic food webs. 
PY 2019
PD FEB
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 610
UT 000464515700002
BP 15
EP 31
DI 10.3354/meps12857
ID 60318
ER

EF