Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs
Decreases in seawater pH and carbonate saturation state (Omega) following the continuous increase in atmospheric CO2 represent a process termed ocean acidification, which is predicted to become a main threat to marine calcifiers in the near future. Segmented, tropical, marine green macro-algae of th...
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Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2015
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Online Access: | https://dx.doi.org/10.1594/pangaea.846939 https://doi.pangaea.de/10.1594/PANGAEA.846939 |
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ftdatacite:10.1594/pangaea.846939 |
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openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Benthos Chlorophyta Coast and continental shelf Containers and aquaria 20-1000 L or < 1 m**2 Growth/Morphology Halimeda opuntia Laboratory experiment Macroalgae Plantae Single species South Pacific Tropical Species Treatment Image number/name Needles Length Width Duration, number of days Identification Alkalinity, total Salinity Temperature, water pH Carbonate system computation flag Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Partial pressure of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Carbonate ion Carbon, inorganic, dissolved Aragonite saturation state Calcite saturation state Potentiometric titration Potentiometric Calculated using seacarb after Nisumaa et al. 2010 Ocean Acidification International Coordination Centre OA-ICC |
spellingShingle |
Benthos Chlorophyta Coast and continental shelf Containers and aquaria 20-1000 L or < 1 m**2 Growth/Morphology Halimeda opuntia Laboratory experiment Macroalgae Plantae Single species South Pacific Tropical Species Treatment Image number/name Needles Length Width Duration, number of days Identification Alkalinity, total Salinity Temperature, water pH Carbonate system computation flag Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Partial pressure of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Carbonate ion Carbon, inorganic, dissolved Aragonite saturation state Calcite saturation state Potentiometric titration Potentiometric Calculated using seacarb after Nisumaa et al. 2010 Ocean Acidification International Coordination Centre OA-ICC Wizemann, Andre Meyer, Friedrich Wilhelm Hofmann, Laurie C Wild, Christian Westphal, Hildegard Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
topic_facet |
Benthos Chlorophyta Coast and continental shelf Containers and aquaria 20-1000 L or < 1 m**2 Growth/Morphology Halimeda opuntia Laboratory experiment Macroalgae Plantae Single species South Pacific Tropical Species Treatment Image number/name Needles Length Width Duration, number of days Identification Alkalinity, total Salinity Temperature, water pH Carbonate system computation flag Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Partial pressure of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Carbonate ion Carbon, inorganic, dissolved Aragonite saturation state Calcite saturation state Potentiometric titration Potentiometric Calculated using seacarb after Nisumaa et al. 2010 Ocean Acidification International Coordination Centre OA-ICC |
description |
Decreases in seawater pH and carbonate saturation state (Omega) following the continuous increase in atmospheric CO2 represent a process termed ocean acidification, which is predicted to become a main threat to marine calcifiers in the near future. Segmented, tropical, marine green macro-algae of the genus Halimeda form a calcareous skeleton that involves biotically initiated and induced calcification processes influenced by cell physiology. As Halimeda is an important habitat provider and major carbonate sediment producer in tropical shallow areas, alterations of these processes due to ocean acidification may cause changes in the skeletal microstructure that have major consequences for the alga and its environment, but related knowledge is scarce. This study used scanning electron microscopy to examine changes of the CaCO3 segment microstructure of Halimedaopuntia specimens that had been exposed to artificially elevated seawater pCO2 of 650 µatm for 45 d. In spite of elevated seawater pCO2, the calcification of needles, located at the former utricle walls, was not reduced as frequent initiation of new needle-shaped crystals was observed. Abundance of the needles was 22 %/µm**2 higher and needle crystal dimensions 14 % longer. However, those needles were 42 % thinner compared with the control treatment. Moreover, lifetime cementation of the segments decreased under elevated seawater pCO2 due to a loss in micro-anhedral carbonate as indicated by significantly thinner calcified rims of central utricles (35-173 % compared with the control treatment). Decreased micro-anhedral carbonate suggests that seawater within the inter-utricular space becomes CaCO3 undersaturated (Omega < 1) during nighttime under conditions of elevated seawater pCO2, thereby favoring CaCO3 dissolution over micro-anhedral carbonate accretion. Less-cemented segments of H. opuntia may impair the environmental success of the alga, its carbonate sediment contribution, and the temporal storage of atmospheric CO2 within Halimeda-derived sediments. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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). The date of carbonate chemistry calculation is 2015-06-01. |
format |
Dataset |
author |
Wizemann, Andre Meyer, Friedrich Wilhelm Hofmann, Laurie C Wild, Christian Westphal, Hildegard |
author_facet |
Wizemann, Andre Meyer, Friedrich Wilhelm Hofmann, Laurie C Wild, Christian Westphal, Hildegard |
author_sort |
Wizemann, Andre |
title |
Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
title_short |
Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
title_full |
Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
title_fullStr |
Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
title_full_unstemmed |
Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs |
title_sort |
ocean acidification alters the calcareous microstructure of the green macro-alga halimeda opuntia, supplement to: wizemann, andre; meyer, friedrich wilhelm; hofmann, laurie c; wild, christian; westphal, hildegard (2015): ocean acidification alters the calcareous microstructure of the green macro-alga halimeda opuntia. coral reefs |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.846939 https://doi.pangaea.de/10.1594/PANGAEA.846939 |
long_lat |
ENVELOPE(-44.616,-44.616,-60.733,-60.733) ENVELOPE(160.600,160.600,-82.667,-82.667) ENVELOPE(-70.967,-70.967,-68.950,-68.950) ENVELOPE(-57.917,-57.917,-63.317,-63.317) |
geographic |
Pacific Laurie Hofmann The Needles Hildegard |
geographic_facet |
Pacific Laurie Hofmann The Needles Hildegard |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Wizemann-etal_2015&t=Calcareous+microstructure+of+the+green+macro-alga+Halimeda+opuntia&ID=846939 https://cran.r-project.org/package=seacarb https://dx.doi.org/10.1007/s00338-015-1288-9 https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Wizemann-etal_2015&t=Calcareous+microstructure+of+the+green+macro-alga+Halimeda+opuntia&ID=846939 https://cran.r-project.org/package=seacarb |
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.846939 https://doi.org/10.1007/s00338-015-1288-9 |
_version_ |
1766156586871422976 |
spelling |
ftdatacite:10.1594/pangaea.846939 2023-05-15T17:50:01+02:00 Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia, supplement to: Wizemann, Andre; Meyer, Friedrich Wilhelm; Hofmann, Laurie C; Wild, Christian; Westphal, Hildegard (2015): Ocean acidification alters the calcareous microstructure of the green macro-alga Halimeda opuntia. Coral Reefs Wizemann, Andre Meyer, Friedrich Wilhelm Hofmann, Laurie C Wild, Christian Westphal, Hildegard 2015 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.846939 https://doi.pangaea.de/10.1594/PANGAEA.846939 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Wizemann-etal_2015&t=Calcareous+microstructure+of+the+green+macro-alga+Halimeda+opuntia&ID=846939 https://cran.r-project.org/package=seacarb https://dx.doi.org/10.1007/s00338-015-1288-9 https://www.pangaea.de/helpers/hs.php?s=Documentation&d=Wizemann-etal_2015&t=Calcareous+microstructure+of+the+green+macro-alga+Halimeda+opuntia&ID=846939 https://cran.r-project.org/package=seacarb Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Benthos Chlorophyta Coast and continental shelf Containers and aquaria 20-1000 L or < 1 m**2 Growth/Morphology Halimeda opuntia Laboratory experiment Macroalgae Plantae Single species South Pacific Tropical Species Treatment Image number/name Needles Length Width Duration, number of days Identification Alkalinity, total Salinity Temperature, water pH Carbonate system computation flag Carbon dioxide Fugacity of carbon dioxide water at sea surface temperature wet air Partial pressure of carbon dioxide water at sea surface temperature wet air Bicarbonate ion Carbonate ion Carbon, inorganic, dissolved Aragonite saturation state Calcite saturation state Potentiometric titration Potentiometric Calculated using seacarb after Nisumaa et al. 2010 Ocean Acidification International Coordination Centre OA-ICC Dataset dataset Supplementary Dataset 2015 ftdatacite https://doi.org/10.1594/pangaea.846939 https://doi.org/10.1007/s00338-015-1288-9 2022-02-09T12:27:05Z Decreases in seawater pH and carbonate saturation state (Omega) following the continuous increase in atmospheric CO2 represent a process termed ocean acidification, which is predicted to become a main threat to marine calcifiers in the near future. Segmented, tropical, marine green macro-algae of the genus Halimeda form a calcareous skeleton that involves biotically initiated and induced calcification processes influenced by cell physiology. As Halimeda is an important habitat provider and major carbonate sediment producer in tropical shallow areas, alterations of these processes due to ocean acidification may cause changes in the skeletal microstructure that have major consequences for the alga and its environment, but related knowledge is scarce. This study used scanning electron microscopy to examine changes of the CaCO3 segment microstructure of Halimedaopuntia specimens that had been exposed to artificially elevated seawater pCO2 of 650 µatm for 45 d. In spite of elevated seawater pCO2, the calcification of needles, located at the former utricle walls, was not reduced as frequent initiation of new needle-shaped crystals was observed. Abundance of the needles was 22 %/µm**2 higher and needle crystal dimensions 14 % longer. However, those needles were 42 % thinner compared with the control treatment. Moreover, lifetime cementation of the segments decreased under elevated seawater pCO2 due to a loss in micro-anhedral carbonate as indicated by significantly thinner calcified rims of central utricles (35-173 % compared with the control treatment). Decreased micro-anhedral carbonate suggests that seawater within the inter-utricular space becomes CaCO3 undersaturated (Omega < 1) during nighttime under conditions of elevated seawater pCO2, thereby favoring CaCO3 dissolution over micro-anhedral carbonate accretion. Less-cemented segments of H. opuntia may impair the environmental success of the alga, its carbonate sediment contribution, and the temporal storage of atmospheric CO2 within Halimeda-derived sediments. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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). The date of carbonate chemistry calculation is 2015-06-01. Dataset Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) Pacific Laurie ENVELOPE(-44.616,-44.616,-60.733,-60.733) Hofmann ENVELOPE(160.600,160.600,-82.667,-82.667) The Needles ENVELOPE(-70.967,-70.967,-68.950,-68.950) Hildegard ENVELOPE(-57.917,-57.917,-63.317,-63.317) |