DOI: 10.1038/ngeo1719
论文题名: Species-specific growth response of coccolithophores to Palaeocene-Eocene environmental change
作者: Gibbs S.J. ; Poulton A.J. ; Bown P.R. ; Daniels C.J. ; Hopkins J. ; Young J.R. ; Jones H.L. ; Thiemann G.J. ; O'dea S.A. ; Newsam C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 3 起始页码: 218
结束页码: 222
语种: 英语
Scopus关键词: abundance
; acidification
; carbon dioxide
; coccolith
; concentration (composition)
; dominance
; environmental change
; extinction
; fossil record
; growth response
; marine ecosystem
; Paleocene-Eocene boundary
; phytoplankton
; taxonomy
; Coccolithus pelagicus
; Emiliania huxleyi
; Haptophyceae
; Toweius
英文摘要: Coccolithophores - single-celled calcifying phytoplankton - represent an essential footing to marine ecosystems, yet their sensitivity to environmental change, and in particular increases in atmospheric CO2, is poorly understood1. During the Palaeocene-Eocene Thermal Maximum (PETM), about 56 million years ago, atmospheric CO2 concentrations rose rapidly and the oceans acidified2,3, making this an ideal time interval to examine coccolithophore responses to environmental change. Here we compare the results of experiments on modern coccolithophore species with exceptional fossil coccosphere records of the PETM, providing a cellular-level perspective. In modern taxa, we find that during the exponential growth phase of rapid cell division, small cells with few coccoliths are produced, whereas larger cells with more coccoliths are produced during slowed cell division. Applying these diagnostic features to the PETM fossil record, we find that the dominant species exhibited different growth responses to the environmental forcing. Toweius pertusus shows geometry indicative of rapid cell division. In contrast, we suggest that cells of Coccolithus pelagicus grew more slowly during the period of environmental change. In the modern ocean, Emiliania huxleyi, which is closely related to the extinct T. pertusus, is prolific and widespread, whereas C. pelagicus is more limited in range and abundance. We argue that these different responses to environmental change were critical to the post-PETM evolutionary success of the descendants of these taxa. Copyright © 2013 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106839
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Ocean and Earth Science, National Oceanography Centre, Southampton, University of Southampton, Southampton, SO14 3ZH, United Kingdom; Ocean Biogeochemistry and Ecosystems, National Oceanography Centre, Waterfront Campus, Southampton, SO14 3ZH, United Kingdom; Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, United Kingdom
Recommended Citation:
Gibbs S.J.,Poulton A.J.,Bown P.R.,et al. Species-specific growth response of coccolithophores to Palaeocene-Eocene environmental change[J]. Nature Geoscience,2013-01-01,6(3)