Μονάδα:
Ερευνητικό υλικό ΕΚΠΑΤμήμα Γεωλογίας και Γεωπεριβάλλοντος
Τίτλος:
Insights into the evolution of the young Lake Ohrid ecosystem and vegetation succession from a southern European refugium during the Early Pleistocene
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Mediterranean mid-altitude sites are critical for the survival of plant species allowing for elevational vegetation shifts in response to high-amplitude climate variability. Pollen records from the southern Balkans have underlined the importance of the region in preserving plant diversity over at least the last half a million years. So far, there are no records of vegetation and climate dynamics from Balkan refugia with an Early Pleistocene age. Here we present a unique palynological archive from such a refugium, the Lake Ohrid basin, recording continuously floristic diversity and vegetation succession under obliquity-paced climate oscillations. Palynological data are complemented by biomarker, diatom, carbonate isotope and sedimentological data to identify the mechanisms controlling shifts in the aquatic and terrestrial ecosystems within the lake and its catchment. The study interval encompasses four complete glacial-interglacial cycles (1365–1165 ka; MIS 43–35). Within the first 100 kyr of lake ontogeny, lake size and depth increase before the lake system enters a new equilibrium state as observed in a distinct shift in biotic communities and sediment composition. Several relict tree genera such as Cedrus, Tsuga, Carya, and Pterocarya played an important role in ecological succession cycles, while total relict abundance accounts for up to half of the total arboreal vegetation. The most prominent biome during interglacials is cool mixed evergreen needleleaf and deciduous broadleaf forests, while cool evergreen needleleaf forests dominate within glacials. A rather forested landscape with a remarkable plant diversity provide unique insights into Early Pleistocene ecosystem resilience and vegetation dynamics. © 2019
Συγγραφείς:
Panagiotopoulos, K.
Holtvoeth, J.
Kouli, K.
Marinova, E.
Francke, A.
Cvetkoska, A.
Jovanovska, E.
Lacey, J.H.
Lyons, E.T.
Buckel, C.
Bertini, A.
Donders, T.
Just, J.
Leicher, N.
Leng, M.J.
Melles, M.
Pancost, R.D.
Sadori, L.
Tauber, P.
Vogel, H.
Wagner, B.
Wilke, T.
Περιοδικό:
Quaternary Science Reviews: The International Multidisciplinary Research and Review Journal
Εκδότης:
Elsevier Ireland Ltd
Λέξεις-κλειδιά:
Aquatic ecosystems; Biomarkers; Catchments; Charcoal; Climatology; Forestry; Isotopes; Lakes, Diatoms; Lipid biomarkers; Mediterranean region; Mid-altitude refugium; Palynological richness; Relicts; Stable isotopes; Vegetation successions, Vegetation, biomarker; biome; climate variation; diatom; forest ecosystem; glacial-interglacial cycle; lake ecosystem; Pleistocene; reconstruction; refugium; relict species; species richness; stable isotope; vegetation cover; vegetation dynamics, Balkans; Lake Ohrid; Mediterranean Region, Bacillariophyta; Carya; Cedrus; Pterocarya; Tsuga
DOI:
10.1016/j.quascirev.2019.106044
