Centennial to decadal vegetation community changes linked to orbital and solar forcing during the Dan-C2 hyperthermal event

D W Jolley, R J Daly, A Ebinghaus, D B Kemp, I. Gilmour, C Mac Niocaill, S P Kelley

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Abstract

Formed close to the K–Pg boundary, the Boltysh meteorite crater, Ukraine, preserves >400 m of lacustrine sedimentary rocks that include a record of the early Danian Dan-C2 hyperthermal event. Abundant pollen, spores and algae recovered from these sediments have yielded a cyclic record of plant ecology change paced by c. 21 kyr orbital precession cycles. New, higher resolution sampling across the inception of the Dan-C2 hyperthermal event has identified oscillations in vegetation community ecology at sub-orbital periods of c. 2 kyr, c. 200 years and c. 11 years. These are consistent with possible Hallstatt, DeVreis–Suess and Schwabe solar cycles, respectively. Rapid regime shift from savanna to a mesic forest ecosystem was paced by c. 21 kyr precession, with the shift probably occurring in <200 years. Prior to regime shift, c. 2 kyr (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.ectively. Rapid regime shift from savanna to a mesic forest ecosystems was paced by ~21ky precession, with the shift likely occurring in <200y. Prior to regime shift, ~2 ky (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.
Original languageEnglish
Pages (from-to)1019-1030
Number of pages11
JournalJournal of the Geological Society
Volume17
Issue number6
Early online date29 Jun 2017
DOIs
Publication statusPublished - Nov 2017

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precession
oscillation
savanna
forest ecosystem
plant community
vegetation
Danian
community ecology
solar cycle
meteorite
crater
spore
sedimentary rock
pollen
alga
sampling
sediment

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Centennial to decadal vegetation community changes linked to orbital and solar forcing during the Dan-C2 hyperthermal event. / Jolley, D W; Daly, R J; Ebinghaus, A; Kemp, D B; Gilmour, I.; Mac Niocaill, C; Kelley, S P.

In: Journal of the Geological Society , Vol. 17, No. 6, 11.2017, p. 1019-1030.

Research output: Contribution to journalArticle

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title = "Centennial to decadal vegetation community changes linked to orbital and solar forcing during the Dan-C2 hyperthermal event",
abstract = "Formed close to the K–Pg boundary, the Boltysh meteorite crater, Ukraine, preserves >400 m of lacustrine sedimentary rocks that include a record of the early Danian Dan-C2 hyperthermal event. Abundant pollen, spores and algae recovered from these sediments have yielded a cyclic record of plant ecology change paced by c. 21 kyr orbital precession cycles. New, higher resolution sampling across the inception of the Dan-C2 hyperthermal event has identified oscillations in vegetation community ecology at sub-orbital periods of c. 2 kyr, c. 200 years and c. 11 years. These are consistent with possible Hallstatt, DeVreis–Suess and Schwabe solar cycles, respectively. Rapid regime shift from savanna to a mesic forest ecosystem was paced by c. 21 kyr precession, with the shift probably occurring in <200 years. Prior to regime shift, c. 2 kyr (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.ectively. Rapid regime shift from savanna to a mesic forest ecosystems was paced by ~21ky precession, with the shift likely occurring in <200y. Prior to regime shift, ~2 ky (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.",
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note = "Acknowledgements The authors would like to thank R.A.Spicer for his helpful comments on a draft version of this paper, and two anonymous referees for their constructive comments. The second author, Rob Daly, died after an extended illness prior to the publication of this paper. He was a valued co-worker and is much missed by his friends and co-workers at Aberdeen. Funding The drilling of the Boltysh crater was funded by Natural Environment Research Council (NERC) grant NE/D005043/1.",
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N1 - Acknowledgements The authors would like to thank R.A.Spicer for his helpful comments on a draft version of this paper, and two anonymous referees for their constructive comments. The second author, Rob Daly, died after an extended illness prior to the publication of this paper. He was a valued co-worker and is much missed by his friends and co-workers at Aberdeen. Funding The drilling of the Boltysh crater was funded by Natural Environment Research Council (NERC) grant NE/D005043/1.

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AB - Formed close to the K–Pg boundary, the Boltysh meteorite crater, Ukraine, preserves >400 m of lacustrine sedimentary rocks that include a record of the early Danian Dan-C2 hyperthermal event. Abundant pollen, spores and algae recovered from these sediments have yielded a cyclic record of plant ecology change paced by c. 21 kyr orbital precession cycles. New, higher resolution sampling across the inception of the Dan-C2 hyperthermal event has identified oscillations in vegetation community ecology at sub-orbital periods of c. 2 kyr, c. 200 years and c. 11 years. These are consistent with possible Hallstatt, DeVreis–Suess and Schwabe solar cycles, respectively. Rapid regime shift from savanna to a mesic forest ecosystem was paced by c. 21 kyr precession, with the shift probably occurring in <200 years. Prior to regime shift, c. 2 kyr (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.ectively. Rapid regime shift from savanna to a mesic forest ecosystems was paced by ~21ky precession, with the shift likely occurring in <200y. Prior to regime shift, ~2 ky (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering.

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