Methods to quantify components of the excavating sponge Cliona orientalis Thiele, 1900

Fang, James K. H., Schonberg, Christine H. L., Kline, David I., Hoegh-Guldberg, Ove and Dove, Sophie (2013) Methods to quantify components of the excavating sponge Cliona orientalis Thiele, 1900. Marine Ecology, 34 2: 193-206. doi:10.1111/maec.12005


Author Fang, James K. H.
Schonberg, Christine H. L.
Kline, David I.
Hoegh-Guldberg, Ove
Dove, Sophie
Title Methods to quantify components of the excavating sponge Cliona orientalis Thiele, 1900
Formatted title
Methods to quantify components of the excavating sponge Cliona orientalis Thiele, 1900
Journal name Marine Ecology   Check publisher's open access policy
ISSN 0173-9565
1439-0485
Publication date 2013-06
Year available 2012
Sub-type Article (original research)
DOI 10.1111/maec.12005
Volume 34
Issue 2
Start page 193
End page 206
Total pages 14
Place of publication Berlin, Germany
Publisher Wiley-Blackwell
Collection year 2013
Language eng
Abstract This study applied the loss after combustion (LAC) method and the acid decalcification (ADC) method to quantify different components of an excavating sponge. Samples of dried coral skeleton of Favia sp. invaded by the Indo-Pacific excavating sponge Cliona orientalis Thiele, 1900 were used. The sponge tissue penetrated the 12-mm-thick samples to approximately 10 mm. The average proportional weight of organic matter, siliceous spicules, calcareous substrate and salts in the entire samples was found to be respectively 2.5%, 4.4%, 90.5% and 2.5% of dry weight applying the LAC method, and 2.9%, 5.9%, 89.0% and 2.3% of dry weight applying the ADC method. Respective volumetric proportions of the organic matter, spicules, substrate and salts were then calculated to be 6.4%, 5.5%, 85.2% and 3.0% of volume with the LAC method, and 7.4%, 7.2%, 82.7% and 2.7% of volume with the ADC method. The LAC method showed low variability of data and is simple and fast and therefore is recommended. The ADC method generated very similar results to the LAC method. However, due to the handling involved in the ADC method, more than half of the spicules may be lost and the method is therefore not recommended unless careful data corrections are considered. In addition, the buoyant weight method was used to quantify actual substrate weight in the fresh sponge-substrate samples. This method was found to be at least 97% effective, revealing that buoyant weights can potentially be used to quantify bioerosion rates of excavating sponges. To our knowledge, this is the first study to systemically quantify organic and inorganic components of an excavating sponge and its calcareous substrate, providing improved standard methods for future studies.
Keyword Bioerosion
Biomass
Excavating sponges
Component analysis
Spicules
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 11 October 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Global Change Institute Publications
Official 2013 Collection
School of Biological Sciences Publications
 
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Created: Mon, 04 Feb 2013, 15:35:36 EST by Gail Walter on behalf of School of Biological Sciences