FN Archimer Export Format
PT J
TI Ocean acidification reduces hardness and stiffness of the Portuguese oyster shell with impaired microstructure: a hierarchical analysis
BT 
AF MENG, Yuan
   GUO, Zhenbin
   FITZER, Susan C.
   UPADHYAY, Abhishek
   CHAN, Bin San
   LI, Chaoyi
   CUSACK, Maggie
   YAO, Haimin
   YEUNG, Kelvin W. K.
   THIYAGARAJAN, Vengatesen
AS 1:1,2;2:3;3:4;4:1,2;5:5,6;6:1,2;7:7;8:3;9:8;10:1,2,9;
FF 1:;2:;3:;4:;5:PDG-RBE-PFOM-LPI;6:;7:;8:;9:;10:;
C1 Univ Hong Kong, Swire Inst Marine Sci, Pokfulam, Hong Kong, Peoples R China.
   Univ Hong Kong, Sch Biol Sci, Pokfulam, Hong Kong, Peoples R China.
   Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.
   Univ Stirling, Fac Nat Sci, Inst Aquaculture, Pathfoot Bldg, Stirling FK9 4LA, Scotland.
   Clemson Univ, Dept Biol Sci, Clemson, SC 29634 USA.
   IFREMER, Physiol Fonct Organismes Marins, UMR 6539, LEMAR,CNRS,UBO,IRD, CS 10070, F-29280 Plouzane, France.
   Univ Stirling, Fac Nat Sci, Div Biol & Environm Sci, Cottrell Bldg, Stirling FK9 4LA, Scotland.
   Univ Hong Kong, Queen Mary Hosp, Dept Orthopaed & Traumatol, Pokfulam, Hong Kong, Peoples R China.
   State Key Lab Marine Pollut, Hong Kong, Hong Kong, Peoples R China.
C2 UNIV HONG KONG, CHINA
   UNIV HONG KONG, CHINA
   UNIV HONG KONG, CHINA
   UNIV STIRLING, UK
   UNIV CLEMSON, USA
   IFREMER, FRANCE
   UNIV STIRLING, UK
   UNIV HONG KONG, CHINA
   STATE KEY LAB MARINE POLLUT, CHINA
SI ARGENTON
SE PDG-RBE-PFOM-LPI
UM LEMAR
IN WOS Ifremer jusqu'en 2018
   DOAJ
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 3.951
TC 33
UR https://archimer.ifremer.fr/doc/00469/58114/60537.pdf
   https://archimer.ifremer.fr/doc/00469/58114/60538.pdf
   https://archimer.ifremer.fr/doc/00469/58114/60539.pdf
LA English
DT Article
AB The rapidly intensifying process of ocean acidification (OA) due to anthropogenic CO2 is not only depleting carbonate ions necessary for calcification but also causing acidosis and disrupting internal pH homeostasis in several marine organisms. These negative consequences of OA on marine calcifiers, i.e. oyster species, have been very well documented in recent studies; however, the consequences of reduced or impaired calcification on the end-product, shells or skeletons, still remain one of the major research gaps. Shells produced by marine organisms under OA are expected to show signs of dissolution, disorganized microstructure and reduced mechanical properties. To bridge this knowledge gap and to test the above hypothesis, we investigated the effect of OA on juvenile shells of the commercially important oyster species, Magallana angulata, at ecologically and climatically relevant OA levels (using pH 8.1, 7.8, 7.5, 7.2). In lower pH conditions, a drop of shell hardness and stiffness was revealed by nanoindentation tests, while an evident porous internal microstructure was detected by scanning electron microscopy. Crystallographic orientation, on the other hand, showed no significant difference with decreasing pH using electron back-scattered diffraction (EBSD). These results indicate the porous internal microstructure may be the cause of the reduction in shell hardness and stiffness. The overall decrease of shell density observed from micro-computed tomography analysis indicates the porous internal microstructure may run through the shell, thus inevitably limiting the effectiveness of the shell's defensive function. This study shows the potential deterioration of oyster shells induced by OA, especially in their early life stage. This knowledge is critical to estimate the survival and production of edible oysters in the future ocean. 
PY 2018
PD NOV
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 15
IS 22
UT 000450278800002
BP 6833
EP 6846
DI 10.5194/bg-15-6833-2018
ID 58114
ER

EF