Universität zu Köln

Donders, Timme ORCID: 0000-0003-4698-3463, Panagiotopoulos, Konstantinos ORCID: 0000-0002-3158-7962, Koutsodendris, Andreas ORCID: 0000-0003-4236-7508, Bertini, Adele, Mercuri, Anna Maria ORCID: 0000-0001-6138-4165, Masi, Alessia ORCID: 0000-0001-9822-9767, Combourieu-Nebout, Nathalie ORCID: 0000-0002-3604-5986, Joannin, Sebastien ORCID: 0000-0001-8345-9252, Kouli, Katerina ORCID: 0000-0003-1656-1091, Kousis, Ilias ORCID: 0000-0002-9752-9351, Peyron, Odile, Torri, Paola, Florenzano, Assunta, Francke, Alexander ORCID: 0000-0002-0370-5802, Wagner, Bernd and Sadori, Laura ORCID: 0000-0002-2774-6705 (2021). 1.36 million years of Mediterranean forest refugium dynamics in response to glacial-interglacial cycle strength. Proc. Natl. Acad. Sci. U. S. A., 118 (34). WASHINGTON: NATL ACAD SCIENCES. ISSN 0027-8424

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Donders, Timme UNSPECIFIED orcid.org/0000-0003-4698-3463 UNSPECIFIED Panagiotopoulos, Konstantinos UNSPECIFIED orcid.org/0000-0002-3158-7962 UNSPECIFIED Koutsodendris, Andreas UNSPECIFIED orcid.org/0000-0003-4236-7508 UNSPECIFIED Bertini, Adele UNSPECIFIED UNSPECIFIED UNSPECIFIED Mercuri, Anna Maria UNSPECIFIED orcid.org/0000-0001-6138-4165 UNSPECIFIED Masi, Alessia UNSPECIFIED orcid.org/0000-0001-9822-9767 UNSPECIFIED Combourieu-Nebout, Nathalie UNSPECIFIED orcid.org/0000-0002-3604-5986 UNSPECIFIED Joannin, Sebastien UNSPECIFIED orcid.org/0000-0001-8345-9252 UNSPECIFIED Kouli, Katerina UNSPECIFIED orcid.org/0000-0003-1656-1091 UNSPECIFIED Kousis, Ilias UNSPECIFIED orcid.org/0000-0002-9752-9351 UNSPECIFIED Peyron, Odile UNSPECIFIED UNSPECIFIED UNSPECIFIED Torri, Paola UNSPECIFIED UNSPECIFIED UNSPECIFIED Florenzano, Assunta UNSPECIFIED UNSPECIFIED UNSPECIFIED Francke, Alexander UNSPECIFIED orcid.org/0000-0002-0370-5802 UNSPECIFIED Wagner, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Sadori, Laura UNSPECIFIED orcid.org/0000-0002-2774-6705 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-601416
DOI:	10.1073/pnas.2026111118|1of9
Journal or Publication Title:	Proc. Natl. Acad. Sci. U. S. A.
Volume:	118
Number:	34
Date:	2021
Publisher:	NATL ACAD SCIENCES
Place of Publication:	WASHINGTON
ISSN:	0027-8424
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIDDLE PLEISTOCENE; TENAGHI-PHILIPPON; PALYNOLOGICAL RICHNESS; VEGETATION DYNAMICS; QUATERNARY REFUGIA; PLANT DIVERSITY; CLIMATE CHANGES; ISOTOPE RECORD; POLLEN RECORD; DEEP SECTION Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/60141