Structure and palaeoenvironmental implications of inter-branch coenosteum-rich skeleton in corymbose Acropora species

Sadler, J., Webb, G. E. and Nothdurft, L. D. (2014) Structure and palaeoenvironmental implications of inter-branch coenosteum-rich skeleton in corymbose Acropora species. Coral Reefs, 34 1: 201-213. doi:10.1007/s00338-014-1228-0


Author Sadler, J.
Webb, G. E.
Nothdurft, L. D.
Title Structure and palaeoenvironmental implications of inter-branch coenosteum-rich skeleton in corymbose Acropora species
Formatted title
Structure and palaeoenvironmental implications of inter-branch coenosteum-rich skeleton in corymbose Acropora species
Journal name Coral Reefs   Check publisher's open access policy
ISSN 0722-4028
1432-0975
Publication date 2014-10-26
Year available 2014
Sub-type Article (original research)
DOI 10.1007/s00338-014-1228-0
Open Access Status
Volume 34
Issue 1
Start page 201
End page 213
Total pages 13
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2015
Language eng
Formatted abstract
Coral reefs provide an increasingly important archive of palaeoclimate data that can be used to constrain climate model simulations. Reconstructing past environmental conditions may also provide insights into the potential of reef systems to survive changes in the Earth’s climate. Reef-based palaeoclimate reconstructions are predominately derived from colonies of massive Porites, with the most abundant genus in the Indo-Pacific—Acropora—receiving little attention owing to their branching growth trajectories, high extension rates and secondary skeletal thickening. However, inter-branch skeleton (consisting of both coenosteum and corallites) near the bases of corymbose Acropora colonies holds significant potential as a climate archive. This region of Acropora skeleton is atypical, having simple growth trajectories with parallel corallites, approximately horizontal density banding, low apparent extension rates and a simple microstructure with limited secondary thickening. Hence, inter-branch skeleton in Acropora bears more similarities to the coralla of massive corals, such as Porites, than to traditional Acropora branches. Cyclic patterns of Sr/Ca ratios in this structure suggest that the observed density banding is annual in nature, thus opening up the potential to use abundant corymbose Acropora for palaeoclimate reconstruction.
Keyword Acropora
Coenosteum
Density banding
Palaeoclimate
Skeletal microstructure
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 26 October 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2015 Collection
 
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