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Movement of deep-sea coral populations on climatic timescales

Thiagarajan, Nivedita; Gerlach, Dana; Roberts, Mark L.; Burke, Andrea; McNichol, Ann; Jenkins, William J.; Subhas, Adam V.; Thresher, Ronald E.; Adkins, Jess F.

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, [O2] and [CO32–].

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Also Published In

Title
Paleoceanography
DOI
https://doi.org/10.1002/palo.20023

More About This Work

Academic Units
Lamont-Doherty Earth Observatory
Published Here
June 19, 2013