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| Titel |
Reconstructing skeletal fiber arrangement and growth mode in the coral Porites lutea (Cnidaria, Scleractinia): a confocal Raman microscopy study |
| VerfasserIn |
M. Wall, G. Nehrke |
| 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 ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-28), S.4885-4895 |
| Datensatznummer |
250007420
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| Publikation (Nr.) |
 copernicus.org/bg-9-4885-2012.pdf |
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| Zusammenfassung |
| Confocal Raman microscopy (CRM) mapping was used to investigate the
microstructural arrangement and organic matrix distribution within the
skeleton of the coral Porites lutea. Relative changes in the crystallographic orientation
of crystals within the fibrous fan-system could be mapped, without the need
to prepare thin sections, as required if this information is obtained by
polarized light microscopy. Simultaneously, incremental growth lines can be
visualized without the necessity of etching and hence alteration of sample
surface. Using these methods two types of growth lines could be identified:
one corresponds to the well-known incremental growth layers, whereas the
second type of growth lines resemble denticle finger-like structures (most
likely traces of former spines or skeletal surfaces). We hypothesize that
these lines represent the outer skeletal surface before another growth cycle
of elongation, infilling and thickening of skeletal areas continues. We show
that CRM mapping with high spatial resolution can significantly improve our
understanding of the micro-structural arrangement and growth patterns in
coral skeletons. |
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