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| Titel |
Limpets counteract ocean acidification induced shell corrosion by thickening of aragonitic shell layers |
| VerfasserIn |
G. Langer, G. Nehrke, C. Baggini, R. Rodolfo-Metalpa, J. M. Hall-Spencer, J. Bijma |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 24 ; Nr. 11, no. 24 (2014-12-20), S.7363-7368 |
| Datensatznummer |
250117753
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| Publikation (Nr.) |
 copernicus.org/bg-11-7363-2014.pdf |
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| Zusammenfassung |
| Specimens of the patellogastropod limpet Patella caerulea were
collected within (pHlow-shells) and outside
(pHn-shells) a CO2 vent site at Ischia, Italy. Four
pHlow-shells and four pHn-shells were sectioned
transversally and scanned for polymorph distribution by means of confocal
Raman microscopy. The pHlow-shells displayed a twofold increase
in aragonite area fraction and size-normalised aragonite area.
Size-normalised calcite area was halved in pHlow-shells. Taken
together with the increased apical and the decreased flank size-normalised
thickness of the pHlow-shells, these data led us to conclude that
low-pH-exposed P. caerulea specimens counteract shell dissolution by
enhanced shell production. This is different from normal elongation growth
and proceeds through addition of aragonitic parts only, while the production
of calcitic parts is confined to elongation growth. Therefore, aragonite cannot be regarded as a disadvantageous polymorph
per se under ocean acidification conditions. |
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