Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell
Abstract: 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 c...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
Clemson University Libraries
2018
|
Subjects: | |
Online Access: | https://tigerprints.clemson.edu/all_data/1255 https://doi.pangaea.de/10.1594/PANGAEA.908309 |
id |
ftclemsonuniv:oai:tigerprints.clemson.edu:all_data-2255 |
---|---|
record_format |
openpolar |
spelling |
ftclemsonuniv:oai:tigerprints.clemson.edu:all_data-2255 2023-06-11T04:15:44+02:00 Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell Meng, Yuan Upadhyay, Abhishek Yeung, Kelvin W.K. Chan, Vera B.S. Thiyagarajan, Vengatesen Li, Chaoyi Cusack, Maggie Guo, Zhenbin Fitzer, Susan C. Yao, Haimin 2018-11-13T08:00:00Z https://tigerprints.clemson.edu/all_data/1255 https://doi.pangaea.de/10.1594/PANGAEA.908309 eng eng Clemson University Libraries https://tigerprints.clemson.edu/all_data/1255 https://doi.pangaea.de/10.1594/PANGAEA.908309 All Data Sets Temperature water Calcite saturation state standard deviation Area porosity Carbon dioxide Carbonate ion Density Bicarbonate ion Alkalinity total pH Carbon inorganic dissolved Stiffness Uniform resource locator/link to reference Salinity Species Aragonite saturation state Registration number of species Hardness Type Treatment Carbonate system computation flag Volume Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide text 2018 ftclemsonuniv 2023-04-22T22:39:31Z Abstract: 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. Category: geoscientificInformation Source: Supplement to: Meng, Yuan; Guo, Zhenbin; Fitzer, Susan C; Upadhyay, Abhishek; Chan, Vera B S; Li, Chaoyi; Cusack, Maggie; Yao, ... Text Ocean acidification Clemson University: TigerPrints |
institution |
Open Polar |
collection |
Clemson University: TigerPrints |
op_collection_id |
ftclemsonuniv |
language |
English |
topic |
Temperature water Calcite saturation state standard deviation Area porosity Carbon dioxide Carbonate ion Density Bicarbonate ion Alkalinity total pH Carbon inorganic dissolved Stiffness Uniform resource locator/link to reference Salinity Species Aragonite saturation state Registration number of species Hardness Type Treatment Carbonate system computation flag Volume Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide |
spellingShingle |
Temperature water Calcite saturation state standard deviation Area porosity Carbon dioxide Carbonate ion Density Bicarbonate ion Alkalinity total pH Carbon inorganic dissolved Stiffness Uniform resource locator/link to reference Salinity Species Aragonite saturation state Registration number of species Hardness Type Treatment Carbonate system computation flag Volume Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide Meng, Yuan Upadhyay, Abhishek Yeung, Kelvin W.K. Chan, Vera B.S. Thiyagarajan, Vengatesen Li, Chaoyi Cusack, Maggie Guo, Zhenbin Fitzer, Susan C. Yao, Haimin Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
topic_facet |
Temperature water Calcite saturation state standard deviation Area porosity Carbon dioxide Carbonate ion Density Bicarbonate ion Alkalinity total pH Carbon inorganic dissolved Stiffness Uniform resource locator/link to reference Salinity Species Aragonite saturation state Registration number of species Hardness Type Treatment Carbonate system computation flag Volume Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide |
description |
Abstract: 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. Category: geoscientificInformation Source: Supplement to: Meng, Yuan; Guo, Zhenbin; Fitzer, Susan C; Upadhyay, Abhishek; Chan, Vera B S; Li, Chaoyi; Cusack, Maggie; Yao, ... |
format |
Text |
author |
Meng, Yuan Upadhyay, Abhishek Yeung, Kelvin W.K. Chan, Vera B.S. Thiyagarajan, Vengatesen Li, Chaoyi Cusack, Maggie Guo, Zhenbin Fitzer, Susan C. Yao, Haimin |
author_facet |
Meng, Yuan Upadhyay, Abhishek Yeung, Kelvin W.K. Chan, Vera B.S. Thiyagarajan, Vengatesen Li, Chaoyi Cusack, Maggie Guo, Zhenbin Fitzer, Susan C. Yao, Haimin |
author_sort |
Meng, Yuan |
title |
Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
title_short |
Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
title_full |
Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
title_fullStr |
Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
title_full_unstemmed |
Seawater carbonate chemistry and hardness and stiffness of the Portuguese oyster shell |
title_sort |
seawater carbonate chemistry and hardness and stiffness of the portuguese oyster shell |
publisher |
Clemson University Libraries |
publishDate |
2018 |
url |
https://tigerprints.clemson.edu/all_data/1255 https://doi.pangaea.de/10.1594/PANGAEA.908309 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
All Data Sets |
op_relation |
https://tigerprints.clemson.edu/all_data/1255 https://doi.pangaea.de/10.1594/PANGAEA.908309 |
_version_ |
1768372791573217280 |