Universität zu Köln

Cvetkoska, Aleksandra ORCID: 0000-0002-9812-8816, Jovanovska, Elena, Francke, Alexander ORCID: 0000-0002-0370-5802, Tofilovska, Slavica, Vogel, Hendrik ORCID: 0000-0002-9902-8120, Levkov, Zlatko, Donders, Timme H., Wagner, Bernd ORCID: 0000-0002-1369-7893 and Wagner-Cremer, Friederike ORCID: 0000-0002-8119-3558 (2016). Ecosystem regimes and responses in a coupled ancient lake system from MIS 5b to present: the diatom record of lakes Ohrid and Prespa. Biogeosciences, 13 (10). S. 3147 - 3163. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1726-4189

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Abstract

We reconstruct the aquatic ecosystem interactions since the last interglacial period in the oldest, most diverse, hydrologically connected European lake system, by using palaeolimnological diatom and selected geochemistry data from Lake Ohrid DEEP site core and equivalent data from Lake Prespa core, Co1215. Driven by climate forcing, the lakes experienced two adaptive cycles during the last 92aEuro-ka: 'interglacial and interstadial' and 'glacial' cycle. The short-term ecosystems reorganizations, e.g. regime shifts within these cycles substantially differ between the lakes, as evident from the inferred amplitudes of variation. The deeper Lake Ohrid shifted between ultra oligo- and oligotrophic regimes in contrast to the much shallower Lake Prespa, which shifted from a deeper, (oligo-) mesotrophic to a shallower, eutrophic lake and vice versa. Due to the high level of ecosystem stability (e.g. trophic state, lake level), Lake Ohrid appears relatively resistant to external forcing, such as climate and environmental change. Recovering in a relatively short time from major climate change, Lake Prespa is a resilient ecosystem. At the DEEP site, the decoupling between the lakes' response to climate change is marked in the prolonged and gradual changes during the MIS 5/4 and 2/1 transitions. These response differences and the lakes' different physical and chemical properties may limit the influence of Lake Prespa on Lake Ohrid. Regime shifts of Lake Ohrid due to potential hydrological change in Lake Prespa are not evident in the data presented here. Moreover, a complete collapse of the ecosystems functionality and loss of their diatom communities did not happen in either lake for the period presented in the study.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Cvetkoska, Aleksandra UNSPECIFIED orcid.org/0000-0002-9812-8816 UNSPECIFIED Jovanovska, Elena UNSPECIFIED UNSPECIFIED UNSPECIFIED Francke, Alexander UNSPECIFIED orcid.org/0000-0002-0370-5802 UNSPECIFIED Tofilovska, Slavica UNSPECIFIED UNSPECIFIED UNSPECIFIED Vogel, Hendrik UNSPECIFIED orcid.org/0000-0002-9902-8120 UNSPECIFIED Levkov, Zlatko UNSPECIFIED UNSPECIFIED UNSPECIFIED Donders, Timme H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wagner, Bernd UNSPECIFIED orcid.org/0000-0002-1369-7893 UNSPECIFIED Wagner-Cremer, Friederike UNSPECIFIED orcid.org/0000-0002-8119-3558 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-292370
DOI:	10.5194/bg-13-3147-2016
Journal or Publication Title:	Biogeosciences
Volume:	13
Number:	10
Page Range:	S. 3147 - 3163
Date:	2016
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1726-4189
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CLIMATE-CHANGE; ENVIRONMENTAL-CHANGE; HOLOCENE CLIMATE; LATE PLEISTOCENE; RESILIENCE; MACEDONIA; KA; VARIABILITY; REGION; ALBANIA Multiple languages Ecology; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/29237