FN Archimer Export Format
PT J
TI Foraminiferal community response to seasonal anoxia in Lake Grevelingen (the Netherlands)
BT 
AF RICHIRT, Julien
   RIEDEL, Bettina
   MOURET, Aurelia
   SCHWEIZER, Magali
   LANGLET, Dewi
   SEITAJ, Dorina
   MEYSMAN, Filip J. R.
   SLOMP, Caroline P.
   JORISSEN, Frans J.
AS 1:1;2:1,2;3:1;4:1;5:1,3;6:4;7:5,6;8:7;9:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Angers, UMR 6112 LPG BIAF Recent & Fossil Bioindicators, 2 Blvd Lavoisier, F-49045 Angers, France.
   Vienna Museum Nat Hist, Zool Dept 1, Burgring 7, A-1010 Vienna, Austria.
   Univ Lille, Univ Littoral Cote Opale, Lab Oceanol & Geosci, UMR8187,CNRS, F-62930 Wimereux, France.
   Royal Netherlands Inst Sea Res NIOZ, Dept Ecosyst Studies, Yerseke, Netherlands.
   Univ Antwerp, Dept Biol, Univ Pl 1, B-2610 Antwerp, Belgium.
   Delft Univ Technol, Dept Biotechnol, NL-2629 HZ Delft, Netherlands.
   Univ Utrecht, Fac Geosci, Dept Earth Sci Geochem, Princetonlaan 8a, NL-3584 CB Utrecht, Netherlands.
C2 UNIV ANGERS, FRANCE
   NHM, AUSTRIA
   UNIV LILLE, FRANCE
   NIOZ, NETHERLANDS
   UNIV ANTWERP, BELGIUM
   UNIV DELFT, NETHERLANDS
   UNIV UTRECHT, NETHERLANDS
IN DOAJ
IF 4.295
TC 16
UR https://archimer.ifremer.fr/doc/00865/97678/106616.pdf
   https://archimer.ifremer.fr/doc/00865/97678/106617.pdf
   https://archimer.ifremer.fr/doc/00865/97678/106618.pdf
   https://archimer.ifremer.fr/doc/00865/97678/106619.pdf
LA English
DT Article
AB Over the last decades, hypoxia in marine coastal environments has become more and more widespread, prolonged and intense. Hypoxic events have large consequences for the functioning of benthic ecosystems. In severe cases, they may lead to complete anoxia and the presence of toxic sulfides in the sediment and bottom-water, thereby strongly affecting biological compartments of benthic marine ecosystems. Within these ecosystems, benthic foraminifera show a high diversity of ecological responses, with a wide range of adaptive life strategies. Some species are particularly resistant to hypoxia-anoxia, and consequently it is interesting to study the whole foraminiferal community as well as speciesspecific responses to such events. Here we investigated the temporal dynamics of living benthic foraminiferal communities (recognised by CellTracker (TM) Green) at two sites in the saltwater Lake Grevelingen in the Netherlands. These sites are subject to seasonal anoxia with different durations and are characterised by the presence of free sulfide (H2S) in the uppermost part of the sediment. Our results indicate that foraminiferal communities are impacted by the presence of H2S in their habitat, with a stronger response in the case of longer exposure times. At the deepest site (34m), in summer 2012, 1 to 2 months of anoxia and free H2S in the surface sediment resulted in an almost complete disappearance of the foraminiferal community. Conversely, at the shallower site (23 m), where the duration of anoxia and free H2S was shorter (1 month or less), a dense foraminiferal community was found throughout the year except for a short period after the stressful event. Interestingly, at both sites, the foraminiferal community showed a delayed response to the onset of anoxia and free H2S, suggesting that the combination of anoxia and free H2S does not lead to increased mortality, but rather to strongly decreased reproduction rates. At the deepest site, where highly stressful conditions prevailed for 1 to 2 months, the recovery time of the community takes about half a year. In Lake Grevelingen, Elphidium selseyense and Elphidium magellanicum are much less affected by anoxia and free H2S than Ammonia sp. T6. We hypothesise that this is not due to a higher tolerance for H2S, but rather related to the seasonal availability of food sources, which could have been less suitable for Ammonia sp. T6 than for the elphidiids. 
PY 2020
PD MAR
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 17
IS 6
UT 000521594000002
BP 1415
EP 1435
DI 10.5194/bg-17-1415-2020
ID 97678
ER

EF