pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges
Coral reefs are threatened by a multitude of environmental and biotic influences. Among these, excavating sponges raise particular concern since they bore into coral skeleton forming extensive cavities which lead to weakening and loss of reef structures. Sponge bioerosion is achieved by a combinatio...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/377970 2023-07-23T04:21:11+02:00 pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges Webb, Alice E. Pomponi, Shirley A. van Duyl, Fleur C. Reichart, Gert-Jan de Nooijer, Lennart J. non-UU output of UU-AW members Stratigraphy and paleontology 2019-01-24 image/pdf https://dspace.library.uu.nl/handle/1874/377970 en eng 2045-2322 https://dspace.library.uu.nl/handle/1874/377970 info:eu-repo/semantics/OpenAccess Cellular imaging Marine biology General Article 2019 ftunivutrecht 2023-07-02T02:43:34Z Coral reefs are threatened by a multitude of environmental and biotic influences. Among these, excavating sponges raise particular concern since they bore into coral skeleton forming extensive cavities which lead to weakening and loss of reef structures. Sponge bioerosion is achieved by a combination of chemical dissolution and mechanical chip removal and ocean acidification has been shown to accelerate bioerosion rates. However, despite the ecological relevance of sponge bioerosion, the exact chemical conditions in which dissolution takes place and how chips are removed remain elusive. Using fluorescence microscopy, we show that intracellular pH is lower at etching sites compared to ambient seawater and the sponge’s tissue. This is realised through the extension of filopodia filled with low intracellular pH vesicles suggesting that protons are actively transported into this microenvironment to promote CaCO3 dissolution. Furthermore, fusiform myocyte-like cells forming reticulated pathways were localised at the interface between calcite and sponge. Such cells may be used by sponges to contract a conductive pathway to remove chips possibly instigated by excess Ca2+ at the boring site. The mechanism underlying CaCO3 dissolution by sponges provides new insight into how environmental conditions can enhance dissolution and improves predictions of future rates of coral dissolution due to sponge activity. Article in Journal/Newspaper Ocean acidification Utrecht University Repository |
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Open Polar |
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Utrecht University Repository |
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ftunivutrecht |
language |
English |
topic |
Cellular imaging Marine biology General |
spellingShingle |
Cellular imaging Marine biology General Webb, Alice E. Pomponi, Shirley A. van Duyl, Fleur C. Reichart, Gert-Jan de Nooijer, Lennart J. pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
topic_facet |
Cellular imaging Marine biology General |
description |
Coral reefs are threatened by a multitude of environmental and biotic influences. Among these, excavating sponges raise particular concern since they bore into coral skeleton forming extensive cavities which lead to weakening and loss of reef structures. Sponge bioerosion is achieved by a combination of chemical dissolution and mechanical chip removal and ocean acidification has been shown to accelerate bioerosion rates. However, despite the ecological relevance of sponge bioerosion, the exact chemical conditions in which dissolution takes place and how chips are removed remain elusive. Using fluorescence microscopy, we show that intracellular pH is lower at etching sites compared to ambient seawater and the sponge’s tissue. This is realised through the extension of filopodia filled with low intracellular pH vesicles suggesting that protons are actively transported into this microenvironment to promote CaCO3 dissolution. Furthermore, fusiform myocyte-like cells forming reticulated pathways were localised at the interface between calcite and sponge. Such cells may be used by sponges to contract a conductive pathway to remove chips possibly instigated by excess Ca2+ at the boring site. The mechanism underlying CaCO3 dissolution by sponges provides new insight into how environmental conditions can enhance dissolution and improves predictions of future rates of coral dissolution due to sponge activity. |
author2 |
non-UU output of UU-AW members Stratigraphy and paleontology |
format |
Article in Journal/Newspaper |
author |
Webb, Alice E. Pomponi, Shirley A. van Duyl, Fleur C. Reichart, Gert-Jan de Nooijer, Lennart J. |
author_facet |
Webb, Alice E. Pomponi, Shirley A. van Duyl, Fleur C. Reichart, Gert-Jan de Nooijer, Lennart J. |
author_sort |
Webb, Alice E. |
title |
pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
title_short |
pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
title_full |
pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
title_fullStr |
pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
title_full_unstemmed |
pH Regulation and Tissue Coordination Pathways Promote Calcium Carbonate Bioerosion by Excavating Sponges |
title_sort |
ph regulation and tissue coordination pathways promote calcium carbonate bioerosion by excavating sponges |
publishDate |
2019 |
url |
https://dspace.library.uu.nl/handle/1874/377970 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
2045-2322 https://dspace.library.uu.nl/handle/1874/377970 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772186459439104000 |