LAST TWO MILLENNIA WATER LEVEL CHANGES OF THE LAKE MŁYNEK (NORTHERN POLAND)INFERRED FROM DIATOMS AND CHRYSOPHYTE CYSTS RECORD
Journal Title: Studia Quaternaria - Year 2018, Vol 35, Issue 2
Abstract
A sediment core, 350 cm long recovered from Młynek Lake, northern of Poland (Warmia and Masuria Region) was analyzed with respect to their content of diatoms and chrysophyte cysts. The aim was to reconstruct the lake water level and climatic changes during the past 2500 years. The recognized diatom assemblages displayed marked floristic changes along the sediment core samples. The main change in diatom composition consists of a shift from an assemblage dominated by benthic Fragilaria sensu lato species through marked intervals to a planktonic one in distinct zones. A high proportion of benthic to plankton taxa has been reported as indicative for a lowering of the lake level with long ice cover in a cold dry climate and a shift from benthic to planktonic diatom taxa reflects arising water level with longest growing season and reduced ice cover on the lake during a warm wet climate. Multivariate statistical analysis included hierarchical ascending clustering distinguished four diatom ecological groups. The analyzed core section was divided into 11 diatom zones according to a distribution of ecological groups and variation in abundance of dominant species supported by 14C data. The results displayed a developmental history of the Młynek Lake that can be divided into 6 main phases of alternating warm wet and cold dry shifts. A distinct dominance of planktonic eutrophic indicator diatoms accompanied by a low abundance of chrysophyte cysts indicates increased lake trophicity and a general trend for the increasing anthropogenic impact.
Authors and Affiliations
Abdelfattah Zalat, Fabian Welc, Jerzy Nitychoruk, Leszek Marks, Marta Chodyka, Łukasz Zbucki
Keywords
Related Articles
- EP ID EP594245
- DOI 10.2478/squa-2018-0006
- Views 47
- Downloads 0
Chronostratigraphy of alluvia and age of fluvial landforms in the Carpathian Foreland during the Vistulian
A development of opinions on stratigraphy of alluvia and age of the Vistulian terraces in the valleys of the Carpathian foreland is presented, based mainly on publications of Professor Leszek Starkel. Studies of age of f...
In Memory of Professor David Krinsley, University of Oregon
b/d
Climatic influences on appearance and development of Neolithic cultures in southern outskirts of Carpathian basin
Southern outskirts of Carpathian basin, namely the region between Sava, Drava and Danube rivers, have specific climate conditions today partially influenced by geological structure and geographical position. In this regi...
Anthropogenic transformation of the vegetation in the immediate vicinity of the settlement complex in Poganowo (Mrągowo Lakeland, NE Poland)
The results of pollen, non-pollen palynomorph and microcharcoal particle analyses of deposits from a small pond in north-eastern Poland are presented. The study focused on human-induced vegetation changes that occurred i...
Stratigraphic position of tills in the Orłowo Cliff section (northern Poland): a new approach
The site at Orłowo Cliff was used to analyse the stratigraphic position and palaeogeographic interpretations of the properties and depositional conditions of two basal tills from the Late Pleistocene. A multi-proxy appro...