FN Archimer Export Format
PT J
TI Temporal distribution and diversity of cold-water corals in the southwest Indian Ocean over the past 25,000 years
BT 
AF Pratt, Naomi
   Chen, Tianyu
   Li, Tao
   Wilson, David J.
   van de Flierdt, Tina
   Little, Susan H.
   Taylor, Michelle L.
   Robinson, Laura F.
   Rogers, Alex D.
   Santodomingo, Nadiezhda
AS 1:1;2:2,3;3:2,3;4:1,4;5:1;6:1;7:5;8:2;9:6,7;10:8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, Exhibition Road, London, SW7 2AZ, UK
   School of Earth Sciences, University of Bristol, BS8 1RJ, UK
   School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China
   Department of Earth Sciences, University College London, WC1E 6BS, UK
   School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK
   Department of Zoology, University of Oxford, Tinbergen Building, South Parks Road, Oxford, OX1 3PS, UK
   REV Ocean, Oksenøyveien 10, NO-1366, Lysaker, Norway
   Natural History Museum, Department of Earth Sciences, Cromwell Road, SW7 5BD, London, UK
C2 IMPERIAL COLL LONDON, UK
   UNIV BRISTOL, UK
   UNIV NANJING, CHINA
   UNIV COLL LONDON, UK
   UNIV ESSEX, UK
   UNIV OXFORD, UK
   REV OCEAN, NORWAY
   NHM, UK
IF 2.606
TC 5
UR https://archimer.ifremer.fr/doc/00498/60949/83887.pdf
LA English
DT Article
CR VT 90 / SOUC
BO Marion Dufresne
AB Fossil cold-water corals can be used to reconstruct physical, chemical, and biological changes in the ocean because their skeleton often preserves ambient seawater signatures. Furthermore, patterns in the geographic and temporal extent of cold-water corals have changed through time in response to environmental conditions. Here we present taxonomic and dating results from a new collection of subfossil cold-water corals recovered from seamounts of the Southwest Indian Ocean Ridge. The area is a dynamic hydrographic region characterised by eastward flow of the Agulhas Return Current and the northernmost fronts of the Antarctic Circumpolar Current. In total, 122 solitary scleractinian corals and 27 samples of colonial scleractinian material were collected from water depths between 172 and 1395 m, corresponding to subtropical waters, Antarctic Intermediate Water (AAIW), and Upper Circumpolar Deep Water (UCDW). Fifteen species were identified, including eight species new to the region. The assemblage reflects the position of the seamounts in a transition zone between Indo-Pacific and Subantarctic biogeographic zones. Morphological variation in caryophyllids and the restriction of dendrophylliids to the southern seamounts could result from genetic isolation or reflect environmental conditions. Uranium-series dating using both rapid laser ablation and precise isotope dilution methods reveals their temporal distribution from the Last Glacial Maximum to the present day. Only one specimen of glacial age was found, while peaks in abundance occur around Heinrich Stadial 1 and the Younger Dryas, times at which ocean chemistry and food supply were likely to have presented optimal conditions for cold-water corals. A widespread regional preference of cold-water corals for UCDW over AAIW depths during the deglacial, the reverse of the modern situation, could be explained by higher dissolved oxygen concentrations and a temperature inversion that persisted into the early Holocene. 
PY 2019
PD JUN
SO Deep-sea Research Part I-oceanographic Research Papers
SN 0967-0637
PU Elsevier BV
VL 149
UT 000483410100008
DI 10.1016/j.dsr.2019.05.009
ID 60949
ER

EF