FN Archimer Export Format
PT J
TI Impact of dust addition on the microbial food web under present and future conditions of pH and temperature
BT 
AF Dinasquet, Julie
   Bigeard, Estelle
   Gazeau, Frédéric
   Azam, Farooq
   Guieu, Cécile
   Marañón, Emilio
   Ridame, Céline
   Van Wambeke, France
   Obernosterer, Ingrid
   Baudoux, Anne-Claire
AS 1:1,2;2:3;3:4;4:1;5:4;6:5;7:6;8:7;9:2;10:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Marine Biology Research Division, Scripps Institution of Oceanography, UCSD, USA
   Sorbonne Université, CNRS, Laboratoire d’Océanographie Microbienne, LOMIC, France
   Sorbonne Université, CNRS, Station Biologique de Roscoff, UMR 7144 Adaptation et Diversité en Milieu Marin, France
   Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, 06230 Villefranche-sur-Mer, France
   Department of Ecology and Animal Biology, Universidade de Vigo, Spain
   CNRS-INSU/IRD/MNHN/UPMC, LOCEAN: Laboratoire d'Océanographie et du Climat: Expérimentation et Approches Numériques, UMR 7159
   Aix-Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography, UM110, France
C2 UNIV CALIF SAN DIEGO, USA
   UNIV SORBONNE, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV VIGO, SPAIN
   CNRS, FRANCE
   UNIV AIX MARSEILLE, FRANCE
IN DOAJ
IF 4.9
TC 6
UR https://archimer.ifremer.fr/doc/00699/81065/85125.pdf
   https://archimer.ifremer.fr/doc/00699/81065/85126.pdf
   https://archimer.ifremer.fr/doc/00699/81065/93441.pdf
   https://archimer.ifremer.fr/doc/00699/81065/93442.pdf
LA English
DT Article
CR PEACETIME
BO Pourquoi pas ?
AB In the oligotrophic waters of the Mediterranean Sea, during the stratification period, the microbial loop relies on pulsed inputs of nutrients through atmospheric deposition of aerosols from both natural (Saharan dust) and anthropogenic origins. While the influence of dust deposition on microbial processes and community composition is still not fully constrained, the extent to which future environmental conditions will affect dust inputs and the microbial response is not known. The impact of atmospheric wet dust deposition was studied both under present and future (warming and acidification) environmental conditions through experiments in 300 L climate reactors. Three dust addition experiments were performed with surface seawater collected from the Tyrrhenian Sea, Ionian Sea and Algerian basin in the Western Mediterranean Sea during the PEACETIME cruise in May–June 2017. Top-down controls on bacteria, viral processes and community, as well as microbial community structure (16S and 18S rDNA amplicon sequencing) were followed over the 3–4 days experiments. Different microbial and viral responses to dust were observed rapidly after addition and were most of the time higher when combined to future environmental conditions. The input of nutrients and trace metals changed the microbial ecosystem from bottom-up limited to a top-down controlled bacterial community, likely from grazing and induced lysogeny. The composition of mixotrophic microeukaryotes and phototrophic prokaryotes was also altered. Overall, these results suggest that the effect of dust deposition on the microbial loop is dependent on the initial microbial assemblage and metabolic state of the tested water, and that predicted warming, and acidification will intensify these responses, affecting food web processes and biogeochemical cycles. 
PY 2022
PD MAR
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 19
IS 4
UT 000765564400001
BP 1303
EP 1319
DI 10.5194/bg-19-1303-2022
ID 81065
ER

EF