| Summary: | During the past 40,000 years, global climate has moved into and out of a full glacial period, with the deglaciation marked by several millennial-scale rapid climate change events. Here we investigate the ecological response of deep-sea coral communities to both glaciation and these rapid climate change events. We find that the deep-sea coral populations of Desmophyllum dianthus in both the North Atlantic and the Tasmanian seamounts expand at times of rapid climate change. However, during the more stable Last Glacial Maximum, the coral population globally retreats to a more restricted depth range. Holocene populations show regional patterns that provide some insight into what causes these dramatic changes in population structure. The most important factors are likely responses to climatically driven changes in productivity, [O_2] and [CO_3^(2–)]. © 2013 American Geophysical Union. Received 13 November 2012; revised 16 February 2013; accepted 21 February 2013; published 30 May 2013. We would like to thank the crew of the R/V Thomas Thompson and R/V Southern Surveyor for their dedicated support during two cruises to the westerly wind belt. We would also like to thank Joel Tropp (Caltech) for help with statistical analysis. Published - palo20023.pdf Supplemental Material - SI_Figure_1.pdf Supplemental Material - SI_Figure_2.pdf Supplemental Material - radiocarbon19SI.pdf Supplemental Material - table1.pdf Supplemental Material - table2.pdf Supplemental Material - table3.pdf Supplemental Material - table4.pdf
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