Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis
peer reviewed Cidaroid sea urchins are the sister clade to all other extant echinoids and have numerous unique features, including unusual primary spines. These lack an epidermis when mature, exposing their high-magnesium calcite skeleton to seawater and allowing the settlement of numerous epibionts...
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Blackwell Publishing Inc.
2014
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Online Access: | https://orbi.uliege.be/handle/2268/183620 https://doi.org/10.1111/ivb.12054 |
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ftorbi:oai:orbi.ulg.ac.be:2268/183620 2024-04-21T08:09:47+00:00 Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis Dery, A. Guibourt, V. Catarino, A. I. Compère, Philippe Dubois, Philippe 2014 https://orbi.uliege.be/handle/2268/183620 https://doi.org/10.1111/ivb.12054 en eng Blackwell Publishing Inc. urn:issn:1077-8306 https://orbi.uliege.be/handle/2268/183620 info:hdl:2268/183620 doi:10.1111/ivb.12054 scopus-id:2-s2.0-84901916686 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Invertebrate Biology, 133 (2), 188-199 (2014) Echinoderm Global change Skeleton Solubility Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2014 ftorbi https://doi.org/10.1111/ivb.12054 2024-03-27T14:57:58Z peer reviewed Cidaroid sea urchins are the sister clade to all other extant echinoids and have numerous unique features, including unusual primary spines. These lack an epidermis when mature, exposing their high-magnesium calcite skeleton to seawater and allowing the settlement of numerous epibionts. Cidaroid spines are made of an inner core of classical monocrystalline skeleton and an outer layer of polycrystalline magnesium calcite. Interestingly, cidaroids survived the Permian-Triassic crisis, which was characterized by severe acidification of the ocean. Currently, numerous members of this group inhabit the deep ocean, below the saturation horizon for their magnesium calcite skeleton. This suggests that members of this taxon may have characteristics that may allow them to resist ongoing ocean acidification linked to global change. We compared the effect of acidified seawater (pH 7.2, 7.6, or 8.2) on mature spines with a fully developed cortex to that on young, growing spines, in which only the stereom core was developed. The cortex of mature spines was much more resistant to etching than the stereom of young spines. We then examined the properties of the cortex that might be responsible for its resistance compared to the underlying stereomic layers, namely morphology, intramineral organic material, magnesium concentration, intrinsic solubility of the mineral, and density. Our results indicate that the acidification resistance of the cortex is probably due to its lower magnesium concentration and higher density, the latter reducing the amount of surface area in contact with acidified seawater. The biofilm and epibionts covering the cortex of mature spines may also reduce its exposure to seawater. © 2014, The American Microscopical Society, Inc. Article in Journal/Newspaper Ocean acidification University of Liège: ORBi (Open Repository and Bibliography) Invertebrate Biology 133 2 188 199 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Echinoderm Global change Skeleton Solubility Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
spellingShingle |
Echinoderm Global change Skeleton Solubility Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Dery, A. Guibourt, V. Catarino, A. I. Compère, Philippe Dubois, Philippe Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
topic_facet |
Echinoderm Global change Skeleton Solubility Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
peer reviewed Cidaroid sea urchins are the sister clade to all other extant echinoids and have numerous unique features, including unusual primary spines. These lack an epidermis when mature, exposing their high-magnesium calcite skeleton to seawater and allowing the settlement of numerous epibionts. Cidaroid spines are made of an inner core of classical monocrystalline skeleton and an outer layer of polycrystalline magnesium calcite. Interestingly, cidaroids survived the Permian-Triassic crisis, which was characterized by severe acidification of the ocean. Currently, numerous members of this group inhabit the deep ocean, below the saturation horizon for their magnesium calcite skeleton. This suggests that members of this taxon may have characteristics that may allow them to resist ongoing ocean acidification linked to global change. We compared the effect of acidified seawater (pH 7.2, 7.6, or 8.2) on mature spines with a fully developed cortex to that on young, growing spines, in which only the stereom core was developed. The cortex of mature spines was much more resistant to etching than the stereom of young spines. We then examined the properties of the cortex that might be responsible for its resistance compared to the underlying stereomic layers, namely morphology, intramineral organic material, magnesium concentration, intrinsic solubility of the mineral, and density. Our results indicate that the acidification resistance of the cortex is probably due to its lower magnesium concentration and higher density, the latter reducing the amount of surface area in contact with acidified seawater. The biofilm and epibionts covering the cortex of mature spines may also reduce its exposure to seawater. © 2014, The American Microscopical Society, Inc. |
format |
Article in Journal/Newspaper |
author |
Dery, A. Guibourt, V. Catarino, A. I. Compère, Philippe Dubois, Philippe |
author_facet |
Dery, A. Guibourt, V. Catarino, A. I. Compère, Philippe Dubois, Philippe |
author_sort |
Dery, A. |
title |
Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
title_short |
Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
title_full |
Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
title_fullStr |
Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
title_full_unstemmed |
Properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin Phyllacanthus imperialis |
title_sort |
properties, morphogenesis, and effect of acidification on spines of the cidaroid sea urchin phyllacanthus imperialis |
publisher |
Blackwell Publishing Inc. |
publishDate |
2014 |
url |
https://orbi.uliege.be/handle/2268/183620 https://doi.org/10.1111/ivb.12054 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Invertebrate Biology, 133 (2), 188-199 (2014) |
op_relation |
urn:issn:1077-8306 https://orbi.uliege.be/handle/2268/183620 info:hdl:2268/183620 doi:10.1111/ivb.12054 scopus-id:2-s2.0-84901916686 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/ivb.12054 |
container_title |
Invertebrate Biology |
container_volume |
133 |
container_issue |
2 |
container_start_page |
188 |
op_container_end_page |
199 |
_version_ |
1796950996543340544 |