DOI: 10.1038/s41561-020-0540-2
论文题名: No state change in pelagic fish production and biodiversity during the Eocene–Oligocene transition
作者: Sibert E.C. ; Zill M.E. ; Frigyik E.T. ; Norris R.D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 3 起始页码: 238
结束页码: 242
语种: 英语
英文关键词: accumulation rate
; deep-sea sediment
; Eocene-Oligocene boundary
; microfossil
; morphotype
; pelagic ecosystem
; pelagic fish
; tooth
; whale
; Antarctica
; Pacific Ocean
; Southern Ocean
; Cetacea
; Euphausiacea
英文摘要: The Eocene/Oligocene (E/O) boundary (~33.9 million years ago) has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event using microfossil fish teeth (ichthyoliths) in seven deep-sea sediment cores from around the world. Ichthyolith accumulation rate (a proxy for fish biomass production) shows no synchronous trends across the E/O. Ichthyolith accumulation in the Southern Ocean and Pacific gyre sites is an order of magnitude lower than that in the equatorial and Atlantic sites, demonstrating that the Southern Ocean was not a highly productive ecosystem for fish before or after the E/O. Further, tooth morphotype diversity and assemblage composition remained stable across the interval, indicating little change in the biodiversity or ecological role of open-ocean fish. While the E/O boundary was a major global climate-change event, its impact on pelagic fish was relatively muted. Our results support recent findings of whale and krill diversification suggesting that the pelagic ecosystem restructuring commonly attributed to the E/O transition probably occurred much later, in the late Oligocene or Miocene. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169680
Appears in Collections: 气候变化与战略
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作者单位: Harvard Society of Fellows, Harvard University, Cambridge, MA, United States; Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, United States; Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States; Department of Earth and Planetary Sciences, University of California Riverside, Riverside, CA, United States
Recommended Citation:
Sibert E.C.,Zill M.E.,Frigyik E.T.,et al. No state change in pelagic fish production and biodiversity during the Eocene–Oligocene transition[J]. Nature Geoscience,2020-01-01,13(3)