FN Archimer Export Format
PT J
TI Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta
BT 
AF AYACHE, Nour
   Lundholm, Nina
   GAi, Frederik
   HERVE, Fabienne
   AMZIL, Zouher
   CARUANA, Amandine
AS 1:1;2:2;3:2;4:1;5:1;6:1;
FF 1:PDG-ODE-DYNECO-PHYC;2:;3:;4:PDG-ODE-DYNECO-PHYC;5:PDG-ODE-DYNECO-PHYC;6:PDG-ODE-DYNECO-PHYC;
C1 Institut Francaise de Recherche pour L'Exploitation de La Mer: Ifremer, Phycotoxin Laboratory, F-44311, Nantes, France
   Natural History Museum of Denmark, University of Copenhagen, Øster Farimagsgade 5, 1307, Copenhagen, Denmark
C2 IFREMER, FRANCE
   NHM DENMARK, DENMARK
SI NANTES
SE PDG-ODE-DYNECO-PHYC
IN WOS Ifremer UPR
   copubli-europe
IF 3.737
TC 7
UR https://archimer.ifremer.fr/doc/00699/81097/94665.pdf
LA English
DT Article
DE ;Amnesic shellfish poisoning;Domoic acid;Harmful algae;Ocean acidification;Pseudo-nitzschia
AB This paper present the effects of ocean acidification on growth and domoic acid (DA) content of several strains of the toxic Pseudo-nitzschia australis and the non-toxic P. fraudulenta. Three strains of each species (plus two subclones of P. australis) were acclimated and grown in semi-continuous cultures at three pH levels: 8.07, 7.77, and 7.40, in order to simulate changes of seawater pH from present to plausible future levels. Our results showed that lowering pH from current level (8.07) to predicted pH level in 2100 (7.77) did not affect the mean growth rates of some of the P. australis strains (FR-PAU-17 and L3-100), but affected other strains either negatively (L3-30) or positively (L3.4). However, the growth rates significantly decreased with pH lowered to 7.40 (by 13% for L3-100, 43% for L3-30 and 16% for IFR-PAU-17 compared to the rates at pH 8.07). In contrast, growth rates of the non-toxic P. fraudulenta strains were not affected by pH changing from 8.07 to 7.40. The P. australis strains produced DA at all pH levels tested, and the highest particulate DA concentration normalized to cell abundance (pDA) was found at pH 8.07. Total DA content (pDA and dissolved DA) was significantly higher at current pH (8.07) compared to pH (7.77), exept for one strain (L 3.4) where no difference was found. At lower pH levels 7.77–7.40, total DA content was similar, except for strains IFR-PAU-17 and L3-100 which had the lowest content at the pH 7.77. The diversity in the responses in growth and DA content highlights the inter- and intra-specific variation in Pseudo-nitzschia species in response to ocean acidification. When exploring environmental responses of Pseudo-nitzschia using cultured cells, not only strain-specific variation but also culturing history should be taken into consideration, as the light levels under which the subclones were cultured, afterwards affected both maximum growth rates and DA content. 
PY 2021
PD JUN
SO Marine Environmental Research
SN 0141-1136
PU Elsevier BV
VL 169
UT 000675833400007
DI 10.1016/j.marenvres.2021.105380
ID 81097
ER

EF