CaltechAUTHORS
  A Caltech Library Service

Effects of chronic low carbonate saturation levels on the distribution, growth and skeletal chemistry of deep-sea corals and other seamount megabenthos

Thresher, Ronald E. and Tilbrook, Bronte and Fallon, Stewart and Wilson, Nick C. and Adkins, Jess (2011) Effects of chronic low carbonate saturation levels on the distribution, growth and skeletal chemistry of deep-sea corals and other seamount megabenthos. Marine Ecology - Progress Series, 442 . pp. 87-99. ISSN 0171-8630. https://resolver.caltech.edu/CaltechAUTHORS:20120127-092337870

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20120127-092337870

Abstract

Ocean acidification has been predicted to reduce the ability of marine organisms to produce carbonate skeletons, threatening their long-term viability and severely impacting marine ecosystems. Corals, as ecosystem engineers, have been identified as particularly vulnerable and important. To determine the sensitivity of corals and allied taxa to long-term exposure to very low carbonate concentrations, we examined the distribution and skeletal characteristics of coral taxa along a natural deep-sea concentration gradient on seamounts of SW Australia. Carbonate under-saturation had little evident effect on the depth distribution, growth or skeletal composition of live scleractinians or gorgonians, with corals growing, often abundantly, in waters as much as 20 to 30% under-saturated. Developmental anomalies in the deepest skeleton-forming anthozoan collected (an isidid gorgonian, at nearly 4 km depth) suggest an absolute low tolerance limit of about 40% under-saturation. Evidence for an effect of acidification on the accumulation of reef structure is ambiguous, with clear indications of dissolution of high-magnesium calcite (HMC) gorgonian skeletons at depths below 2300 m, but also abundant, old scleractinian skeletons well below the aragonite saturation horizon. The latter might be the result of ferromanganese deposition on exposed skeletons, which, however, may render them inhospitable for benthic organisms.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.3354/meps09400DOIUNSPECIFIED
http://www.int-res.com/abstracts/meps/v442/p87-99/PublisherUNSPECIFIED
Additional Information:© 2011 Inter-Research. Submitted: December 23, 2010; Accepted: September 15, 2011. Proofs received from author(s): November 15, 2011. We thank E. Anagnostou, A. Beck, W. Cho, A. Gagnon, K. Gowlett-Holmes, S. John, A. Kennedy, H. Kippo, N. Meckler, D. Mills, D. Staples, A. Subhas and N. Thiagarajan; the crews of the autonomous underwater vehicle (AUV) 'ABE', the ROY 'Jason' and the RVs 'Thomas T. Thompson' and 'Southern Surveyor' for their professional assistance in the field; P. Alderslade, S. Cairns, D. Fautin, K. Gowlett-Holmes, F. McEnnulty and K. Moore for taxonomic assistance; A. Agron. K. Berry, E. Innocenti, C. MacRae and S. Peacock for the mineralogical and chemical analyses; R. Matear for discussions about historical shifts in the ASH; E. Butler for advice on measuring organic fractions in corals; M. Keith and the Woods Hole Advanced Imaging and Visualization Laboratory for photographic expertise; and N. Bax, J . Guinotte, R. Matear and 2 anonymous referees for comments on the manuscript. Components of this work were supported by the National Science Foundation; the Australian Department of Environment, Water, Heritage, and the Arts; the Australian Climate Change Science Program; the Australian Commonwealth Environmental Research Fund; and a grant of ship time by the Australian National Research Facility.
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Australian Department of Environment, Water, Heritage, and the ArtsUNSPECIFIED
Australian Climate Change Science ProgramUNSPECIFIED
Australian Commonwealth Environmental Research Fund UNSPECIFIED
Australian National Research FacilityUNSPECIFIED
Subject Keywords:Anthozoa, Echinoderm, Aragonite saturation horizon, Calcite saturation horizon, Gorgonacea, High-magnesium calcite, Mineralogy, Scleractinia
Record Number:CaltechAUTHORS:20120127-092337870
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120127-092337870
Official Citation:Thresher RE, Tilbrook B, Fallon S, Wilson NC, Adkins J (2011) Effects of chronic low carbonate saturation levels on the distribution, growth and skeletal chemistry of deep-sea corals and other seamount megabenthos. Mar Ecol Prog Ser 442:87-99
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28992
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:30 Jan 2012 16:22
Last Modified:03 Oct 2019 03:37

Repository Staff Only: item control page