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+[[!meta title="The appendicularian Oikopleura dioica can enhance carbon export in a high CO2 ocean."]]
+[[!tag Oikopleura]]
+
+Taucher J, Lechtenbörger AK, Bouquet JM, Spisla C, Boxhammer T, Minutolo F, Bach LT, Lohbeck KT, Sswat M, Dörner I, Ismar-Rebitz SMH, Thompson EM, Riebesell U.
+
+The appendicularian _Oikopleura dioica_ can enhance carbon export in a high CO2 ocean.
+
+Glob Chang Biol. 2023 Nov 10:e17020. doi: 10.1111/gcb.17020.
+
+[[!pmid 37947122 desc=" “pelagic mesocosms [...], each extending to a depth of
+21 m (19 m cylindrical bag and 2 m full size/diameter conical sediment trap
+attached to the bottom of the bag) and enclosing about 60 m3 of the natural
+water column.” “Average pCO2 during the experiment ranged between ~320
+(“ambient”) and 1700 μatm (“high CO2,” corresponding to a drop in pH by
+0.57 units compared to ambient conditions).” “a custom-built net (50 μm mesh
+size; 20 cm in diameter) with a modified, non-filtering cod end (3.8 L clear
+polycarbonate beaker) and reduced towing speeds (0.15 m s−1) was applied in
+order to collect alive and undamaged O. dioica specimen.” “The peak biomass of
+O. dioica was approximately twice as high in the high CO2 mesocosms (2.5 vs.
+1.3 μgC L−1) and occurred earlier (days 13–17) than under ambient conditions
+(day 21)”. “female O. dioica were cultured in mesocosm water (pre-filtered
+through a 50-μm mesh) of the respective CO2 conditions until they achieved
+maturity and produced eggs.” “The fecundity of O. dioica was significantly
+elevated under lower pH, with females producing 278 (±107) eggs under ambient
+and 334 (±14) eggs in the OA treatment“"]]
2014|biblio/24695788]]).
- Meiosis is resumed by change of extracellular pH when the oocytes are released
in seawater. Partenogenesis starts if PP2A is inhibited by DNAi or with
- okadaic acid ([[Matsuo and coll., 2020|biblio/31857067]).
+ okadaic acid ([[Matsuo and coll., 2020|biblio/31857067]]).
- Colchicine treatment induced early differenciation of the oocytes
([[Ganot, Kallesøe, Thompson (2007)|biblio/17123503]]).
+ - In mesocosms under high-CO2 (low-pH) conditions, femals produce more eggs
+ (278 ±11 vs 334 ±14), Taucher and coll. ([[2023|biblio/37947122]]).
### Fertilization and early stages