1 36 million years of mediterranean forest refugium dynamics in response to glacial interglacial CORD-Papers-2021-10-25 (Version 1)

Title: 1.36 million years of Mediterranean forest refugium dynamics in response to glacial-interglacial cycle strength
Abstract: The sediment record from Lake Ohrid (Southwestern Balkans) represents the longest continuous lake archive in Europe, extending back to 1.36 Ma. We reconstruct the vegetation history based on pollen analysis of the DEEP core to reveal changes in vegetation cover and forest diversity during glacial-interglacial (G-IG) cycles and early basin development. The earliest lake phase saw a significantly different composition rich in relict tree taxa and few herbs. Subsequent establishment of a permanent steppic herb association around 1.2 Ma implies a threshold response to changes in moisture availability and temperature and gradual adjustment of the basin morphology. A change in the character of G-IG cycles during the Early-Middle Pleistocene Transition is reflected in the record by reorganization of the vegetation from obliquity- to eccentricity-paced cycles. Based on a quantitative analysis of tree taxa richness, the first large-scale decline in tree diversity occurred around 0.94 Ma. Subsequent variations in tree richness were largely driven by the amplitude and duration of G-IG cycles. Significant tree richness declines occurred in periods with abundant dry herb associations, pointing to aridity affecting tree population survival. Assessment of long-term legacy effects between global climate and regional vegetation change reveals a significant influence of cool interglacial conditions on subsequent glacial vegetation composition and diversity. This effect is contrary to observations at high latitudes, where glacial intensity is known to control subsequent interglacial vegetation, and the evidence demonstrates that the Lake Ohrid catchment functioned as a refugium for both thermophilous and temperate tree species.
Published: 2021
Journal: Proc. Natl. Acad. Sci. U. S. A
Author Name: Donders, Timme
Author link: https://covid19-data.nist.gov/pid/rest/local/author/donders_timme
Author Name: Panagiotopoulos, Konstantinos
Author link: https://covid19-data.nist.gov/pid/rest/local/author/panagiotopoulos_konstantinos
Author Name: Koutsodendris, Andreas
Author link: https://covid19-data.nist.gov/pid/rest/local/author/koutsodendris_andreas
Author Name: Bertini, Adele
Author link: https://covid19-data.nist.gov/pid/rest/local/author/bertini_adele
Author Name: Mercuri, Anna Maria
Author link: https://covid19-data.nist.gov/pid/rest/local/author/mercuri_anna_maria
Author Name: Masi, Alessia
Author link: https://covid19-data.nist.gov/pid/rest/local/author/masi_alessia
Author Name: Combourieu Nebout, Nathalie
Author link: https://covid19-data.nist.gov/pid/rest/local/author/combourieu_nebout_nathalie
Author Name: Joannin, Sbastien
Author link: https://covid19-data.nist.gov/pid/rest/local/author/joannin_sbastien
Author Name: Kouli, Katerina
Author link: https://covid19-data.nist.gov/pid/rest/local/author/kouli_katerina
Author Name: Kousis, Ilias
Author link: https://covid19-data.nist.gov/pid/rest/local/author/kousis_ilias
Author Name: Peyron, Odile
Author link: https://covid19-data.nist.gov/pid/rest/local/author/peyron_odile
Author Name: Torri, Paola
Author link: https://covid19-data.nist.gov/pid/rest/local/author/torri_paola
Author Name: Florenzano, Assunta
Author link: https://covid19-data.nist.gov/pid/rest/local/author/florenzano_assunta
Author Name: Francke, Alexander
Author link: https://covid19-data.nist.gov/pid/rest/local/author/francke_alexander
Author Name: Wagner, Bernd
Author link: https://covid19-data.nist.gov/pid/rest/local/author/wagner_bernd
Author Name: Sadori, Laura
Author link: https://covid19-data.nist.gov/pid/rest/local/author/sadori_laura
license: unk
license_url: [unknown license]
source_x: WHO
source_x_url: https://www.who.int/
who_covidence_id: #mdl-34400496
has_full_text: FALSE
G_ID: 1_36_million_years_of_mediterranean_forest_refugium_dynamics_in_response_to_glacial_interglacial
S2 ID: 237148028