Spatiotemporal heterogeneity of the palaeoecological record in a large temperate palaeolake, Šúr, southwest Slovakia: Comparison of pollen, macrofossil and geochemical data

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Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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POTŮČKOVÁ Anna HÁJKOVÁ Petra ŽÁČKOVÁ Pavla PETR Libor MATYS Grygar Tomáš MARTIN Weiser

Rok publikování 2018
Druh Článek v odborném periodiku
Časopis / Zdroj Palaeogeography, Palaeoclimatology, Palaeoecology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://ac.els-cdn.com/S0031018217301219/1-s2.0-S0031018217301219-main.pdf?_tid=41fa5770-c3ae-11e7-adba-00000aacb35e&acdnat=1510054066_10cebbbf3336e09a96b73d047bca09b8
Doi http://dx.doi.org/10.1016/j.palaeo.2017.09.010
Obor Botanika
Klíčová slova Palaeorecord heterogeneity Multi-proxy Palaeohydrology Lake ecosystem Lake ontogeny Pannonian Basin
Popis Aquatic macrophytes living within shallow lakes are particularly sensitive to climate change and fluctuations in water depth. In the Dabubian Lowland of southwestern Slovakia, sediments from the large, shallow palaeolake, named Šúr, provide a unique opportunity to reconstruct changes in water depth to analyse succession within local aquatic and terrestrial vegetation. Here, we used a multi-core, multi-proxy approach (macrofossils, pollen, and geochemistry) in order to reconstruct water depth changes and its influence on aquatic and terrestrial vegetation succession during the Holocene. Additionally, we also consider how heterogeneity in proxy data varied across time and space. Using particular macrophyte taxa found in the macrofossil assemblage, which have specific water depth requirements, our results demonstrate changes in water depth created a long-term mosaic of vegetation succession. In the Early Holocene, aquatic macrophytes suggest the water column was high. During the Middle Holocene, water depths decreased creating mosaics of aquatic succession. By ca 4200 cal yr B.P., terrestrialization had occurred in the former lake area. Regional vegetation succession was likely more influenced by the presence of fluvial sands and/or by low precipitation and high evaporation rates, which delayed the expansion of temperate trees and favoured Pinus until 8850 cal yr B.P. Macrofossils exhibit the lowest temporal variation among all proxies, which suggests a rather stable macrophyte community when water depth was high. Pollen data show very low spatial variation given by the size of the accumulation basin, which reflects regional pollen rain. Higher spatial variation was observed in the geochemistry and macrofossil data compared to the pollen data, which could be the result of different mosaics of aquatic plants, local dispersion of propagules, or changes in sediment types. We conclude that changes in water depth were not homogenous.
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