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

Research output: Contribution to journalArticle

1 Citation (Scopus)
6 Downloads (Pure)

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

    Fingerprint

Cite this