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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. and Kelley, S. P. (2015). Long-term resilience decline in plant ecosystems across the Danian Dan-C2 hyperthermal event, Boltysh crater, Ukraine. Journal of the Geological Society, 172(4) pp. 491–498.

DOI (Digital Object Identifier) Link: https://doi.org/10.1144/jgs2014-130
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Abstract

Mass-balance calculations indicate that a massive amount of δ13C-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.

Item Type: Journal Item
Copyright Holders: 2015 The Authors
ISSN: 2041-479X
Keywords: climate change; paleoclimate; hyper thermal; Danian; Cretaceous-Paleogene boundary
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Learning and Teaching Innovation (LTI) > Institute of Educational Technology (IET)
Learning and Teaching Innovation (LTI)
Item ID: 43238
Depositing User: Iain Gilmour
Date Deposited: 22 May 2015 09:27
Last Modified: 07 Dec 2018 10:31
URI: http://oro.open.ac.uk/id/eprint/43238
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