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Title: Extracting growth rates from the non-laminated coralline sponge Astrosclera willeyana using "bomb" radiocarbon

Abstract

Coralline sponges have the potential to fill in gaps in our understanding of subsurface oceanographic variability. However, one disadvantage they have compared to hermatypic reef building coral proxies is that they do not have annual density bands and need to be radiometrically dated for an age determination. To elucidate growth rate variability we have measured radiocarbon in 1 mm increments from Astrosclera willeyana sponges collected off the Central and Northern Great Barrier Reef (GBR) and from Truk in the Caroline Islands and compared these radiocarbon profiles to independently dated coral radiocarbon records. Growth rates of the GBR sponges average 1.2 {+-} 0.3 and 1.0 {+-} 0.3 mm yr{sup -1}, north and central respectively but can vary by a factor of two. The growth rate of the Truk sponge averages 1.2 {+-} 0.1 mm yr{sup -1}. These growth rates are significantly faster to those measured for other GBR Astrosclera willeyana sponges (0.2 mm yr{sup -1}) by Calcein staining (Woerheide 1988).

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
875368
Report Number(s):
UCRL-JRNL-205039
TRN: US200603%%29
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Limnology and Oceanography:Methods
Additional Journal Information:
Journal Volume: 3
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; OCEANOGRAPHY; AQUATIC ORGANISMS; ISOTOPE DATING; GROWTH; CORALS

Citation Formats

Fallon, S, and Guilderson, T. Extracting growth rates from the non-laminated coralline sponge Astrosclera willeyana using "bomb" radiocarbon. United States: N. p., 2004. Web.
Fallon, S, & Guilderson, T. Extracting growth rates from the non-laminated coralline sponge Astrosclera willeyana using "bomb" radiocarbon. United States.
Fallon, S, and Guilderson, T. Wed . "Extracting growth rates from the non-laminated coralline sponge Astrosclera willeyana using "bomb" radiocarbon". United States. https://www.osti.gov/servlets/purl/875368.
@article{osti_875368,
title = {Extracting growth rates from the non-laminated coralline sponge Astrosclera willeyana using "bomb" radiocarbon},
author = {Fallon, S and Guilderson, T},
abstractNote = {Coralline sponges have the potential to fill in gaps in our understanding of subsurface oceanographic variability. However, one disadvantage they have compared to hermatypic reef building coral proxies is that they do not have annual density bands and need to be radiometrically dated for an age determination. To elucidate growth rate variability we have measured radiocarbon in 1 mm increments from Astrosclera willeyana sponges collected off the Central and Northern Great Barrier Reef (GBR) and from Truk in the Caroline Islands and compared these radiocarbon profiles to independently dated coral radiocarbon records. Growth rates of the GBR sponges average 1.2 {+-} 0.3 and 1.0 {+-} 0.3 mm yr{sup -1}, north and central respectively but can vary by a factor of two. The growth rate of the Truk sponge averages 1.2 {+-} 0.1 mm yr{sup -1}. These growth rates are significantly faster to those measured for other GBR Astrosclera willeyana sponges (0.2 mm yr{sup -1}) by Calcein staining (Woerheide 1988).},
doi = {},
journal = {Limnology and Oceanography:Methods},
number = ,
volume = 3,
place = {United States},
year = {2004},
month = {6}
}