Long term resilience decline in plant ecosystems across the Danian Dan-C2 hyperthermal event, Boltysh crater, Ukraine

D. W. Jolley, I Gilmour, M. Gilmour, D. B. Kemp, S. P. Kelley

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Abstract

Mass balance calculations indicate that a massive amount of 13C-depleted carbon was released into the early Danian atmosphere in volumes comparable with the younger Paleocene-Eocene thermal maximum (PETM). This Danian hyperthermal event (the Dan-C2) has been documented from the fill of the Boltysh meteorite crater, Ukraine. Palynofloras recovered from the Boltysh crater fill show a trend from mesic forest to savannah ecosystem dominance on a millennial scale across the hyperthermal inception with no abrupt compositional shift. This longer term trend is overprinted by moisture availability oscillations reflecting orbital forcing. Forcing is not directly tracked by the oscillations, which are composed of mesic forest and savannah palynofloras separated by rapid critical transitions. The absence of an ecological collapse at the Dan-C2 indicates that plant ecosystems experienced dominant forcing from orbital cyclicity, rather than a stochastic temperature rise.
Original languageEnglish
Pages (from-to)491-498
Number of pages8
JournalJournal of the Geological Society
Volume172
Issue number4
Early online date21 May 2015
DOIs
Publication statusPublished - Jun 2015

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Danian
crater
fill
oscillation
orbital forcing
ecosystem
Hypsithermal
cyclicity
meteorite
Paleocene
mass balance
Eocene
moisture
atmosphere
carbon
temperature
trend
long-term trend
young
calculation

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Long term resilience decline in plant ecosystems across the Danian Dan-C2 hyperthermal event, Boltysh crater, Ukraine. / Jolley, D. W.; Gilmour, I ; Gilmour, M.; Kemp, D. B.; Kelley, S. P.

In: Journal of the Geological Society , Vol. 172, No. 4, 06.2015, p. 491-498.

Research output: Contribution to journalArticle

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note = "Acknowledgements and Funding The authors are extremely grateful for the receipt of NERC award NE/ D005043/1, which funded the initial Boltysh impact crater study. R. Spicer and J. Leake are thanked for interesting discussions. C. Wellman, W. Gosling and M. Donovan are thanked for constructively critical reviews of the paper. Scientific editing by Quentin Crowley",
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