The effects of environment on Arctica islandica shell formation and architecture
Mollusks record valuable information in their hard parts that reflect ambient environmental conditions. For this reason, shells can serve as excellent archives to reconstruct past climate and environmental variability. However, animal physiology and biomineralization, which are often poorly understo...
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ftiowastateuniv:oai:lib.dr.iastate.edu:ge_at_pubs-1218 2023-05-15T15:22:32+02:00 The effects of environment on Arctica islandica shell formation and architecture Milano, Stefania Nehrke, Gernot Wanamaker, Alan D., Jr Ballesta-Artero, Irene Brey, Thomas Schöne, Bernd R. 2017-01-01T08:00:00Z application/pdf https://lib.dr.iastate.edu/ge_at_pubs/212 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1218&context=ge_at_pubs en eng Iowa State University Digital Repository https://lib.dr.iastate.edu/ge_at_pubs/212 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1218&context=ge_at_pubs http://creativecommons.org/licenses/by/3.0/ CC-BY Geological and Atmospheric Sciences Publications Biogeochemistry Climate Earth Sciences Environmental Indicators and Impact Assessment text 2017 ftiowastateuniv 2021-08-28T22:47:35Z Mollusks record valuable information in their hard parts that reflect ambient environmental conditions. For this reason, shells can serve as excellent archives to reconstruct past climate and environmental variability. However, animal physiology and biomineralization, which are often poorly understood, can make the decoding of environmental signals a challenging task. Many of the routinely used shell-based proxies are sensitive to multiple different environmental and physiological variables. Therefore, the identification and interpretation of individual environmental signals (e.g., water temperature) often is particularly difficult. Additional proxies not influenced by multiple environmental variables or animal physiology would be a great asset in the field of paleoclimatology. The aim of this study is to investigate the potential use of structural properties of Arctica islandica shells as an environmental proxy. A total of 11 specimens were analyzed to study if changes of the microstructural organization of this marine bivalve are related to environmental conditions. In order to limit the interference of multiple parameters, the samples were cultured under controlled conditions. Three specimens presented here were grown at two different water temperatures (10 and 15 °C) for multiple weeks and exposed only to ambient food conditions. An additional eight specimens were reared under three different dietary regimes. Shell material was analyzed with two techniques; (1) confocal Raman microscopy (CRM) was used to quantify changes of the orientation of microstructural units and pigment distribution, and (2) scanning electron microscopy (SEM) was used to detect changes in microstructural organization. Our results indicate that A. islandica microstructure is not sensitive to changes in the food source and, likely, shell pigment are not altered by diet. However, seawater temperature had a statistically significant effect on the orientation of the biomineral. Although additional work is required, the results presented here suggest that the crystallographic orientation of biomineral units of A. islandica may serve as an alternative and independent proxy for seawater temperature. Text Arctica islandica Digital Repository @ Iowa State University |
institution |
Open Polar |
collection |
Digital Repository @ Iowa State University |
op_collection_id |
ftiowastateuniv |
language |
English |
topic |
Biogeochemistry Climate Earth Sciences Environmental Indicators and Impact Assessment |
spellingShingle |
Biogeochemistry Climate Earth Sciences Environmental Indicators and Impact Assessment Milano, Stefania Nehrke, Gernot Wanamaker, Alan D., Jr Ballesta-Artero, Irene Brey, Thomas Schöne, Bernd R. The effects of environment on Arctica islandica shell formation and architecture |
topic_facet |
Biogeochemistry Climate Earth Sciences Environmental Indicators and Impact Assessment |
description |
Mollusks record valuable information in their hard parts that reflect ambient environmental conditions. For this reason, shells can serve as excellent archives to reconstruct past climate and environmental variability. However, animal physiology and biomineralization, which are often poorly understood, can make the decoding of environmental signals a challenging task. Many of the routinely used shell-based proxies are sensitive to multiple different environmental and physiological variables. Therefore, the identification and interpretation of individual environmental signals (e.g., water temperature) often is particularly difficult. Additional proxies not influenced by multiple environmental variables or animal physiology would be a great asset in the field of paleoclimatology. The aim of this study is to investigate the potential use of structural properties of Arctica islandica shells as an environmental proxy. A total of 11 specimens were analyzed to study if changes of the microstructural organization of this marine bivalve are related to environmental conditions. In order to limit the interference of multiple parameters, the samples were cultured under controlled conditions. Three specimens presented here were grown at two different water temperatures (10 and 15 °C) for multiple weeks and exposed only to ambient food conditions. An additional eight specimens were reared under three different dietary regimes. Shell material was analyzed with two techniques; (1) confocal Raman microscopy (CRM) was used to quantify changes of the orientation of microstructural units and pigment distribution, and (2) scanning electron microscopy (SEM) was used to detect changes in microstructural organization. Our results indicate that A. islandica microstructure is not sensitive to changes in the food source and, likely, shell pigment are not altered by diet. However, seawater temperature had a statistically significant effect on the orientation of the biomineral. Although additional work is required, the results presented here suggest that the crystallographic orientation of biomineral units of A. islandica may serve as an alternative and independent proxy for seawater temperature. |
format |
Text |
author |
Milano, Stefania Nehrke, Gernot Wanamaker, Alan D., Jr Ballesta-Artero, Irene Brey, Thomas Schöne, Bernd R. |
author_facet |
Milano, Stefania Nehrke, Gernot Wanamaker, Alan D., Jr Ballesta-Artero, Irene Brey, Thomas Schöne, Bernd R. |
author_sort |
Milano, Stefania |
title |
The effects of environment on Arctica islandica shell formation and architecture |
title_short |
The effects of environment on Arctica islandica shell formation and architecture |
title_full |
The effects of environment on Arctica islandica shell formation and architecture |
title_fullStr |
The effects of environment on Arctica islandica shell formation and architecture |
title_full_unstemmed |
The effects of environment on Arctica islandica shell formation and architecture |
title_sort |
effects of environment on arctica islandica shell formation and architecture |
publisher |
Iowa State University Digital Repository |
publishDate |
2017 |
url |
https://lib.dr.iastate.edu/ge_at_pubs/212 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1218&context=ge_at_pubs |
genre |
Arctica islandica |
genre_facet |
Arctica islandica |
op_source |
Geological and Atmospheric Sciences Publications |
op_relation |
https://lib.dr.iastate.edu/ge_at_pubs/212 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1218&context=ge_at_pubs |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766353174746103808 |