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Deep-sea scleractinian coral age and depth distributions in the northwest Atlantic for the last 225,000 years

Robinson, Laura F. and Adkins, Jess F. and Scheirer, Daniel S. and Fernandez, Diego P. and Gagnon, Alexander and Waller, Rhian G. (2007) Deep-sea scleractinian coral age and depth distributions in the northwest Atlantic for the last 225,000 years. Bulletin of Marine Science, 81 (3). pp. 371-391. ISSN 0007-4977.

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Deep-sea corals have grown for over 200,000 yrs on the New England Seamounts in the northwest Atlantic, and this paper describes their distribution both with respect to depth and time. Many thousands of fossil scleractinian corals were collected on a series of cruises from 2003-2005; by contrast, live ones were scarce. On these seamounts, the depth distribution of fossil Desmophyllum dianthus (Esper, 1794) is markedly different to that of the colonial scleractinian corals, extending 750 m deeper in the water column to a distinct cut-off at 2500 m. This cut-off is likely to be controlled by the maximum depth of a notch-shaped feature in the seamount morphology. The ages of D. dianthus corals as determined by U-series measurements range from modern to older than 200,000 yrs. The age distribution is not constant over time, and most corals have ages from the last glacial period. Within the glacial period, increases in coral population density at Muir and Manning Sea-mounts coincided with times at which large-scale ocean circulation changes have been documented in the deep North Atlantic. Ocean circulation changes have an effect on coral distributions, but the cause of the link is not known.

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Adkins, Jess F.0000-0002-3174-5190
Additional Information:© 2007 Rosenstiel School of Marine and Atmospheric Science. We gratefully acknowledge the support of The Comer Foundation for Abrupt Climate Change, The Henry Luce Foundation, The American Chemical Society Petroleum Research Fund, NSF Grant Numbers OCE-0096373 and OCE-0095331, and NOAA OE Grant Number A05OAR4601054. We would also like to thank the crew, the science parties, and the DSV Alvin and ROV Hercules pilots on RV Atlantis cruise AT7-35 and AT8-1, and the DASS05 expedition to the New England Seamounts.
Funding AgencyGrant Number
Comer Foundation for Abrupt Climate ChangeUNSPECIFIED
Henry Luce FoundationUNSPECIFIED
American Chemical Society Petroleum Research FundUNSPECIFIED
NOAA OE GrantA05OAR4601054
Issue or Number:3
Record Number:CaltechAUTHORS:20120829-095459243
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Official Citation:Deep-sea scleractinian coral age and depth distributions in the northwest Atlantic for the last 225,000 years pp. 371-391(21) Authors: Robinson, Laura F.; Adkins, Jess F.; Scheirer, Daniel S.; Fernandez, Diego P.; Gagnon, Alexander; Waller, Rhian G.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33644
Deposited By: Ruth Sustaita
Deposited On:29 Aug 2012 17:29
Last Modified:24 Feb 2020 10:30

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