Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005
Mytilus edulis were cultured for 3 months under six different seawater pCO2 levels ranging from 380 to 4000 µatm. Specimen were taken from Kiel Fjord (Western Baltic Sea, Germany) which is a habitat with high and variable seawater pCO2 and related shifts in carbonate system speciation (e.g., low pH...
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Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2012
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Online Access: | https://dx.doi.org/10.1594/pangaea.778194 https://doi.pangaea.de/10.1594/PANGAEA.778194 |
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ftdatacite:10.1594/pangaea.778194 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Acid-base regulation Animalia Baltic Sea Benthic animals Benthos Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria <20 L Calcification/Dissolution Coast and continental shelf Growth/Morphology Laboratory experiment Mollusca Mytilus edulis Single species Temperate Identification Experimental treatment Salinity Salinity, standard deviation Temperature, water Temperature, standard deviation pH pH, standard deviation Alkalinity, total Alkalinity, total, standard deviation Carbon, inorganic, dissolved Carbon, inorganic, dissolved, standard deviation Partial pressure of carbon dioxide water at sea surface temperature wet air Carbon dioxide, partial pressure, standard deviation Calcite saturation state Calcite saturation state, standard deviation Aragonite saturation state Aragonite saturation state, standard deviation Mytilus edulis, extrapallial fluid pH Mytilus edulis, extrapallial fluid pH, standard deviation Replicates Mytilus edulis, haemolymph, pH Mytilus edulis, haemolymph, pH, standard deviation Mytilus edulis, extrapallial fluid total carbon Mytilus edulis, extrapallial fluid total carbon, standard deviation Mytilus edulis, haemolymph, total dissolved inorganic carbon Mytilus edulis, haemolymph, total dissolved inorganic carbon, standard deviation Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide, standard deviation Mytilus edulis, haemolymph, partial pressure of carbon dioxide Mytilus edulis, haemolymph, partial pressure of carbon dioxide, standard deviation Mytilus edulis, extrapallial fluid bicarbonate Mytilus edulis, extrapallial fluid bicarbonate, standard deviation Mytilus edulis, haemolymph, bicarbonate ion Mytilus edulis, haemolymph, bicarbonate ion, standard deviation Bicarbonate Mytilus edulis, extrapallial fluid carbonate ion Mytilus edulis, extrapallial fluid carbonate ion, standard deviation Mytilus edulis, haemolymph, carbonate ion Mytilus edulis, haemolymph, carbonate ion, standard deviation Carbonate ion Mytilus edulis, shell mass growth Mytilus edulis, extrapallial fluid, boron/calcium ratio Mytilus edulis, extrapallial fluid, boron/calcium ratio, standard deviation Boron/Calcium ratio Boron/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, strontium/calcium ratio Mytilus edulis, extrapallial fluid, strontium/calcium ratio, standard deviation Strontium/Calcium ratio Strontium/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, magnesium/calcium ratio Mytilus edulis, extrapallial fluid, magnesium/calcium ratio, standard deviation Magnesium/Calcium ratio Magnesium/Calcium ratio, standard deviation Mytilus edulis, shell, δ11B Mytilus edulis, shell, δ11B, standard deviation Mytilus edulis, shell length Mytilus edulis, shell length, standard deviation Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Conductivity meter WTW, Weilheim, Gemany Measured Automated CO2 analyzer CIBA-Corning 965, UK Calculated using CO2SYS Calculated, see references ICP-OES, Inductively coupled plasma - optical emission spectrometry Calculated using seacarb after Nisumaa et al. 2010 Biological Impacts of Ocean Acidification BIOACID European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC |
spellingShingle |
Acid-base regulation Animalia Baltic Sea Benthic animals Benthos Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria <20 L Calcification/Dissolution Coast and continental shelf Growth/Morphology Laboratory experiment Mollusca Mytilus edulis Single species Temperate Identification Experimental treatment Salinity Salinity, standard deviation Temperature, water Temperature, standard deviation pH pH, standard deviation Alkalinity, total Alkalinity, total, standard deviation Carbon, inorganic, dissolved Carbon, inorganic, dissolved, standard deviation Partial pressure of carbon dioxide water at sea surface temperature wet air Carbon dioxide, partial pressure, standard deviation Calcite saturation state Calcite saturation state, standard deviation Aragonite saturation state Aragonite saturation state, standard deviation Mytilus edulis, extrapallial fluid pH Mytilus edulis, extrapallial fluid pH, standard deviation Replicates Mytilus edulis, haemolymph, pH Mytilus edulis, haemolymph, pH, standard deviation Mytilus edulis, extrapallial fluid total carbon Mytilus edulis, extrapallial fluid total carbon, standard deviation Mytilus edulis, haemolymph, total dissolved inorganic carbon Mytilus edulis, haemolymph, total dissolved inorganic carbon, standard deviation Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide, standard deviation Mytilus edulis, haemolymph, partial pressure of carbon dioxide Mytilus edulis, haemolymph, partial pressure of carbon dioxide, standard deviation Mytilus edulis, extrapallial fluid bicarbonate Mytilus edulis, extrapallial fluid bicarbonate, standard deviation Mytilus edulis, haemolymph, bicarbonate ion Mytilus edulis, haemolymph, bicarbonate ion, standard deviation Bicarbonate Mytilus edulis, extrapallial fluid carbonate ion Mytilus edulis, extrapallial fluid carbonate ion, standard deviation Mytilus edulis, haemolymph, carbonate ion Mytilus edulis, haemolymph, carbonate ion, standard deviation Carbonate ion Mytilus edulis, shell mass growth Mytilus edulis, extrapallial fluid, boron/calcium ratio Mytilus edulis, extrapallial fluid, boron/calcium ratio, standard deviation Boron/Calcium ratio Boron/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, strontium/calcium ratio Mytilus edulis, extrapallial fluid, strontium/calcium ratio, standard deviation Strontium/Calcium ratio Strontium/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, magnesium/calcium ratio Mytilus edulis, extrapallial fluid, magnesium/calcium ratio, standard deviation Magnesium/Calcium ratio Magnesium/Calcium ratio, standard deviation Mytilus edulis, shell, δ11B Mytilus edulis, shell, δ11B, standard deviation Mytilus edulis, shell length Mytilus edulis, shell length, standard deviation Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Conductivity meter WTW, Weilheim, Gemany Measured Automated CO2 analyzer CIBA-Corning 965, UK Calculated using CO2SYS Calculated, see references ICP-OES, Inductively coupled plasma - optical emission spectrometry Calculated using seacarb after Nisumaa et al. 2010 Biological Impacts of Ocean Acidification BIOACID European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC Heinemann, Agnes Fietzke, Jan Melzner, Frank Böhm, Florian Thomsen, Jörn Garbe-Schönberg, Dieter Eisenhauer, Anton Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
topic_facet |
Acid-base regulation Animalia Baltic Sea Benthic animals Benthos Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria <20 L Calcification/Dissolution Coast and continental shelf Growth/Morphology Laboratory experiment Mollusca Mytilus edulis Single species Temperate Identification Experimental treatment Salinity Salinity, standard deviation Temperature, water Temperature, standard deviation pH pH, standard deviation Alkalinity, total Alkalinity, total, standard deviation Carbon, inorganic, dissolved Carbon, inorganic, dissolved, standard deviation Partial pressure of carbon dioxide water at sea surface temperature wet air Carbon dioxide, partial pressure, standard deviation Calcite saturation state Calcite saturation state, standard deviation Aragonite saturation state Aragonite saturation state, standard deviation Mytilus edulis, extrapallial fluid pH Mytilus edulis, extrapallial fluid pH, standard deviation Replicates Mytilus edulis, haemolymph, pH Mytilus edulis, haemolymph, pH, standard deviation Mytilus edulis, extrapallial fluid total carbon Mytilus edulis, extrapallial fluid total carbon, standard deviation Mytilus edulis, haemolymph, total dissolved inorganic carbon Mytilus edulis, haemolymph, total dissolved inorganic carbon, standard deviation Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide, standard deviation Mytilus edulis, haemolymph, partial pressure of carbon dioxide Mytilus edulis, haemolymph, partial pressure of carbon dioxide, standard deviation Mytilus edulis, extrapallial fluid bicarbonate Mytilus edulis, extrapallial fluid bicarbonate, standard deviation Mytilus edulis, haemolymph, bicarbonate ion Mytilus edulis, haemolymph, bicarbonate ion, standard deviation Bicarbonate Mytilus edulis, extrapallial fluid carbonate ion Mytilus edulis, extrapallial fluid carbonate ion, standard deviation Mytilus edulis, haemolymph, carbonate ion Mytilus edulis, haemolymph, carbonate ion, standard deviation Carbonate ion Mytilus edulis, shell mass growth Mytilus edulis, extrapallial fluid, boron/calcium ratio Mytilus edulis, extrapallial fluid, boron/calcium ratio, standard deviation Boron/Calcium ratio Boron/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, strontium/calcium ratio Mytilus edulis, extrapallial fluid, strontium/calcium ratio, standard deviation Strontium/Calcium ratio Strontium/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, magnesium/calcium ratio Mytilus edulis, extrapallial fluid, magnesium/calcium ratio, standard deviation Magnesium/Calcium ratio Magnesium/Calcium ratio, standard deviation Mytilus edulis, shell, δ11B Mytilus edulis, shell, δ11B, standard deviation Mytilus edulis, shell length Mytilus edulis, shell length, standard deviation Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Conductivity meter WTW, Weilheim, Gemany Measured Automated CO2 analyzer CIBA-Corning 965, UK Calculated using CO2SYS Calculated, see references ICP-OES, Inductively coupled plasma - optical emission spectrometry Calculated using seacarb after Nisumaa et al. 2010 Biological Impacts of Ocean Acidification BIOACID European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC |
description |
Mytilus edulis were cultured for 3 months under six different seawater pCO2 levels ranging from 380 to 4000 µatm. Specimen were taken from Kiel Fjord (Western Baltic Sea, Germany) which is a habitat with high and variable seawater pCO2 and related shifts in carbonate system speciation (e.g., low pH and low CaCO3 saturation state). Hemolymph (HL) and extrapallial fluid (EPF) samples were analyzed for pH and total dissolved inorganic carbon (CT) to calculate pCO2 and [HCO3]. A second experiment was conducted for 2 months with three different pCO2 levels (380, 1400 and 4000 µatm). Boron isotopes (delta11B) were investigated by LA-MC-ICP-MS (Laser Ablation-Multicollector-Inductively Coupled Plasma-Mass Spectrometry) in shell portions precipitated during experimental treatment time. Additionally, elemental ratios (B/Ca, Mg/Ca and Sr/Ca) in the EPF of specimen from the second experiment were measured via ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometry). Extracellular pH was not significantly different in HL and EPF but systematically lower than ambient water pH. This is due to high extracellular pCO2 values, a prerequisite for metabolic CO2 excretion. No accumulation of extracellular [HCO3] was measured. Elemental ratios (B/Ca, Mg/Ca and Sr/Ca) in the EPF increased slightly with pH which is in accordance with increasing growth and calcification rates at higher seawater pH values. Boron isotope ratios were highly variable between different individuals but also within single shells. This corresponds to a high individual variability in fluid B/Ca ratios and may be due to high boron concentrations in the organic parts of the shell. The mean delta11B value shows no trend with pH but appears to represent internal pH (EPF) rather than ambient water pH. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). |
format |
Dataset |
author |
Heinemann, Agnes Fietzke, Jan Melzner, Frank Böhm, Florian Thomsen, Jörn Garbe-Schönberg, Dieter Eisenhauer, Anton |
author_facet |
Heinemann, Agnes Fietzke, Jan Melzner, Frank Böhm, Florian Thomsen, Jörn Garbe-Schönberg, Dieter Eisenhauer, Anton |
author_sort |
Heinemann, Agnes |
title |
Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
title_short |
Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
title_full |
Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
title_fullStr |
Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
title_full_unstemmed |
Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 |
title_sort |
seawater carbonate chemistry and conditions of mytilus edulis extracellular body fluids and shell composition in a ph-treatment experiment: acid-base status, trace elements and delta11b, 2012, supplement to: heinemann, agnes; fietzke, jan; melzner, frank; böhm, florian; thomsen, jörn; garbe-schönberg, dieter; eisenhauer, anton (2012): conditions of mytilus edulis extracellular body fluids and shell composition in a ph-treatment experiment: acid-base status, trace elements and d11b. geochemistry, geophysics, geosystems, 13, q01005 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2012 |
url |
https://dx.doi.org/10.1594/pangaea.778194 https://doi.pangaea.de/10.1594/PANGAEA.778194 |
long_lat |
ENVELOPE(-66.232,-66.232,-65.794,-65.794) |
geographic |
Thomsen |
geographic_facet |
Thomsen |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://dx.doi.org/10.1029/2011gc003790 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.778194 https://doi.org/10.1029/2011gc003790 |
_version_ |
1766158283034329088 |
spelling |
ftdatacite:10.1594/pangaea.778194 2023-05-15T17:51:12+02:00 Seawater carbonate chemistry and conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and delta11B, 2012, supplement to: Heinemann, Agnes; Fietzke, Jan; Melzner, Frank; Böhm, Florian; Thomsen, Jörn; Garbe-Schönberg, Dieter; Eisenhauer, Anton (2012): Conditions of Mytilus edulis extracellular body fluids and shell composition in a pH-treatment experiment: Acid-base status, trace elements and d11B. Geochemistry, Geophysics, Geosystems, 13, Q01005 Heinemann, Agnes Fietzke, Jan Melzner, Frank Böhm, Florian Thomsen, Jörn Garbe-Schönberg, Dieter Eisenhauer, Anton 2012 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.778194 https://doi.pangaea.de/10.1594/PANGAEA.778194 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2011gc003790 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Acid-base regulation Animalia Baltic Sea Benthic animals Benthos Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria <20 L Calcification/Dissolution Coast and continental shelf Growth/Morphology Laboratory experiment Mollusca Mytilus edulis Single species Temperate Identification Experimental treatment Salinity Salinity, standard deviation Temperature, water Temperature, standard deviation pH pH, standard deviation Alkalinity, total Alkalinity, total, standard deviation Carbon, inorganic, dissolved Carbon, inorganic, dissolved, standard deviation Partial pressure of carbon dioxide water at sea surface temperature wet air Carbon dioxide, partial pressure, standard deviation Calcite saturation state Calcite saturation state, standard deviation Aragonite saturation state Aragonite saturation state, standard deviation Mytilus edulis, extrapallial fluid pH Mytilus edulis, extrapallial fluid pH, standard deviation Replicates Mytilus edulis, haemolymph, pH Mytilus edulis, haemolymph, pH, standard deviation Mytilus edulis, extrapallial fluid total carbon Mytilus edulis, extrapallial fluid total carbon, standard deviation Mytilus edulis, haemolymph, total dissolved inorganic carbon Mytilus edulis, haemolymph, total dissolved inorganic carbon, standard deviation Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide Mytilus edulis, extrapallial fluid partial pressure of carbon dioxide, standard deviation Mytilus edulis, haemolymph, partial pressure of carbon dioxide Mytilus edulis, haemolymph, partial pressure of carbon dioxide, standard deviation Mytilus edulis, extrapallial fluid bicarbonate Mytilus edulis, extrapallial fluid bicarbonate, standard deviation Mytilus edulis, haemolymph, bicarbonate ion Mytilus edulis, haemolymph, bicarbonate ion, standard deviation Bicarbonate Mytilus edulis, extrapallial fluid carbonate ion Mytilus edulis, extrapallial fluid carbonate ion, standard deviation Mytilus edulis, haemolymph, carbonate ion Mytilus edulis, haemolymph, carbonate ion, standard deviation Carbonate ion Mytilus edulis, shell mass growth Mytilus edulis, extrapallial fluid, boron/calcium ratio Mytilus edulis, extrapallial fluid, boron/calcium ratio, standard deviation Boron/Calcium ratio Boron/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, strontium/calcium ratio Mytilus edulis, extrapallial fluid, strontium/calcium ratio, standard deviation Strontium/Calcium ratio Strontium/Calcium ratio, standard deviation Mytilus edulis, extrapallial fluid, magnesium/calcium ratio Mytilus edulis, extrapallial fluid, magnesium/calcium ratio, standard deviation Magnesium/Calcium ratio Magnesium/Calcium ratio, standard deviation Mytilus edulis, shell, δ11B Mytilus edulis, shell, δ11B, standard deviation Mytilus edulis, shell length Mytilus edulis, shell length, standard deviation Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Conductivity meter WTW, Weilheim, Gemany Measured Automated CO2 analyzer CIBA-Corning 965, UK Calculated using CO2SYS Calculated, see references ICP-OES, Inductively coupled plasma - optical emission spectrometry Calculated using seacarb after Nisumaa et al. 2010 Biological Impacts of Ocean Acidification BIOACID European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC Dataset dataset Supplementary Dataset 2012 ftdatacite https://doi.org/10.1594/pangaea.778194 https://doi.org/10.1029/2011gc003790 2022-02-09T13:11:14Z Mytilus edulis were cultured for 3 months under six different seawater pCO2 levels ranging from 380 to 4000 µatm. Specimen were taken from Kiel Fjord (Western Baltic Sea, Germany) which is a habitat with high and variable seawater pCO2 and related shifts in carbonate system speciation (e.g., low pH and low CaCO3 saturation state). Hemolymph (HL) and extrapallial fluid (EPF) samples were analyzed for pH and total dissolved inorganic carbon (CT) to calculate pCO2 and [HCO3]. A second experiment was conducted for 2 months with three different pCO2 levels (380, 1400 and 4000 µatm). Boron isotopes (delta11B) were investigated by LA-MC-ICP-MS (Laser Ablation-Multicollector-Inductively Coupled Plasma-Mass Spectrometry) in shell portions precipitated during experimental treatment time. Additionally, elemental ratios (B/Ca, Mg/Ca and Sr/Ca) in the EPF of specimen from the second experiment were measured via ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometry). Extracellular pH was not significantly different in HL and EPF but systematically lower than ambient water pH. This is due to high extracellular pCO2 values, a prerequisite for metabolic CO2 excretion. No accumulation of extracellular [HCO3] was measured. Elemental ratios (B/Ca, Mg/Ca and Sr/Ca) in the EPF increased slightly with pH which is in accordance with increasing growth and calcification rates at higher seawater pH values. Boron isotope ratios were highly variable between different individuals but also within single shells. This corresponds to a high individual variability in fluid B/Ca ratios and may be due to high boron concentrations in the organic parts of the shell. The mean delta11B value shows no trend with pH but appears to represent internal pH (EPF) rather than ambient water pH. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). Dataset Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) Thomsen ENVELOPE(-66.232,-66.232,-65.794,-65.794) |