FN Archimer Export Format
PT J
TI Sediment archives reveal irreversible shifts in plankton communities after World War II and agricultural pollution
BT 
AF Siano, Raffaele
   LASSUDRIE DUCHESNE, Malwenn
   Cuzin, Pierre
   Briant, Nicolas
   Loizeau, Veronique
   Schmidt, Sabine
   Ehrhold, Axel
   Mertens, Kenneth
   Lambert, Clément
   Quintric, Laure
   Noël, Cyril
   Latimier, Marie
   Quéré, Julien
   DURAND, Patrick
   Penaud, Aurélie
AS 1:1;2:2;3:3;4:4;5:5;6:6;7:7;8:2;9:8;10:3;11:3;12:1;13:1;14:3;15:9;
FF 1:PDG-ODE-DYNECO-PELAGOS;2:PDG-ODE-LITTORAL-LERBO;3:PDG-IRSI-RIC;4:PDG-RBE-BE-LBCM;5:PDG-RBE-PFOM-LARN;6:;7:PDG-REM-GM-LGS;8:PDG-ODE-LITTORAL-LERBO;9:;10:PDG-IRSI-SEBIMER;11:PDG-IRSI-SEBIMER;12:PDG-ODE-DYNECO-PELAGOS;13:PDG-ODE-DYNECO-PELAGOS;14:PDG-IRSI-SEBIMER;15:;
C1 Ifremer, DYNECO, 29280 Plouzané, France
   Ifremer, LITTORAL LER BO, Station de Biologie Marine, Place de la Croix, BP40537, 29900 Concarneau Cedex, France
   Ifremer, SeBiMER, 29280 Plouzané, France
   Ifremer, BE, 44311 Nantes, France
   Ifremer, PFOM, 29280 Plouzané, France
   CNRS, UMR 5805 EPOC, Université de Bordeaux, Pessac, France
   Ifremer, GM, 29280 Plouzané, France
   UMR 6538 Laboratoire Géosciences Océan (LGO), Université de Bretagne Sud (UBS), 56000 Vannes, France
   CNRS, UMR 6538 Laboratoire Géosciences Océan (LGO), Université de Brest (UBO), 29280 Plouzané, France
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   UBS, FRANCE
   CNRS, FRANCE
SI BREST
   CONCARNEAU
   NANTES
SE PDG-ODE-DYNECO-PELAGOS
   PDG-ODE-LITTORAL-LERBO
   PDG-IRSI-RIC
   PDG-RBE-BE-LBCM
   PDG-RBE-PFOM-LARN
   PDG-REM-GM-LGS
   PDG-IRSI-SEBIMER
UM LEMAR
   LGO
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 10.9
TC 23
UR https://archimer.ifremer.fr/doc/00690/80195/95791.pdf
LA English
DT Article
AB To evaluate the stability and resilience1 of coastal ecosystem communities to perturbations that occurred during the Anthropocene,2 pre-industrial biodiversity baselines inferred from paleoarchives are needed.3,4 The study of ancient DNA (aDNA) from sediments (sedaDNA)5 has provided valuable information about past dynamics of microbial species6, 7, 8 and communities9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in relation to ecosystem variations. Shifts in planktonic protist communities might significantly affect marine ecosystems through cascading effects,19, 20, 21 and therefore the analysis of this compartment is essential for the assessment of ecosystem variations. Here, sediment cores collected from different sites of the Bay of Brest (northeast Atlantic, France) allowed ca. 1,400 years of retrospective analyses of the effects of human pollution on marine protists. Comparison of sedaDNA extractions and metabarcoding analyses with different barcode regions (V4 and V7 18S rDNA) revealed that protist assemblages in ancient sediments are mainly composed of species known to produce resting stages. Heavy-metal pollution traces in sediments were ascribed to the World War II period and coincided with community shifts within dinoflagellates and stramenopiles. After the war and especially from the 1980s to 1990s, protist genera shifts followed chronic contaminations of agricultural origin. Community composition reconstruction over time showed that there was no recovery to a Middle Ages baseline composition. This demonstrates the irreversibility of the observed shifts after the cumulative effect of war and agricultural pollutions. Developing a paleoecological approach, this study highlights how human contaminations irreversibly affect marine microbial compartments, which contributes to the debate on coastal ecosystem preservation and restoration. 
PY 2021
PD JUL
SO Current Biology
SN 0960-9822
PU Elsevier BV
VL 31
IS 12
UT 000670441200006
DI 10.1016/j.cub.2021.03.079
ID 80195
ER

EF