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| Titel |
Scaled biotic disruption during early Eocene global warming events |
| VerfasserIn |
S. J. Gibbs, P. R. Bown, B. H. Murphy, A. Sluijs, K. M. Edgar, H. Pälike, C. T. Bolton, J. C. Zachos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-22), S.4679-4688 |
| Datensatznummer |
250007404
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| Publikation (Nr.) |
 copernicus.org/bg-9-4679-2012.pdf |
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| Zusammenfassung |
| Late Paleocene and early Eocene hyperthermals are transient warming events
associated with massive perturbations of the global carbon cycle, and are
considered partial analogues for current anthropogenic climate change.
Because the magnitude of carbon release varied between the events, they are
natural experiments ideal for exploring the relationship between carbon
cycle perturbations, climate change and biotic response. Here we quantify
marine biotic variability through three million years of the early Eocene
that include five hyperthermals, utilizing a method that allows us to
integrate the records of different plankton groups through scenarios ranging
from background to major extinction events. Our long time-series calcareous
nannoplankton record indicates a scaling of biotic disruption to climate
change associated with the amount of carbon released during the various
hyperthermals. Critically, only the three largest hyperthermals, the
Paleocene–Eocene Thermal Maximum (PETM), Eocene Thermal Maximum 2 (ETM2) and
the I1 event, show above-background variance, suggesting that the magnitude
of carbon input and associated climate change needs to surpass a threshold
value to cause significant biotic disruption. |
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