Movement of deep-sea coral populations on climatic timescales

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

来源：Paleoceanography, 2013, 28(2): 227-236.

DOI：10.1002/palo.20023

• Radiocarbon
• Coral
• Glacial

During the past 40,000years, 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 [CO32-].<original-structure label="1"></original-structure>
Key Points
400+ deep-sea corals were 14C-dated using Reconnaissance Dating MethodCoral populations respond to major climatic events, including LGM, YD and HS1Coral populations affected by changes in productivity, oxygen and [CO32-]</list-item

• 出版日期2013-6