Witak, Małgorzata; Hernandez Almeida, Ivan; Grosjean, Martin; Tylmann, Wojciech (2017). Diatom-based reconstruction of trophic status changes recorded in varved sediments of Lake Żabińskie (northeastern Poland), AD 1888-2010. Oceanological and Hydrobiological Studies, 46(1), pp. 1-17. De Gruyter 10.1515/ohs-2017-0001
|
Text
10.1515_ohs-2017-0001.pdf - Published Version Available under License Creative Commons: Attribution-Noncommercial-No Derivative Works (CC-BY-NC-ND). Download (2MB) | Preview |
We investigated diatom assemblages in surface sediments of 46 lakes in northern Poland and developed a diatom-based transfer function to infer epilimnetic total phosphorus (TP) concentrations. Multivariate ordination techniques (DCA, CCA) were used to identify major environmental gradients and to evaluate the effect of environmental parameters on the distribution of diatoms in the modern diatom dataset. The transfer function was developed using PLS, WA and WA-PLS models, and applied to a varved sediment core from Lake Żabińskie, AD 1888-2010. Annually-resolved quantitative reconstruction of TP concentrations shows that multidecadal changes in the TP level reflect the local settlement history, land-use changes and development of agriculture and tourism. The period of high trophic levels with maximum values of TP was documented until the late 1920s. In the 1930s-1970s period, TP generally decreased and eutraphentic flora was partly replaced by oligotraphentic and oligo-mesotraphentic diatom taxa. The reconstructed TP concentrations have started to increase from the 1970s. After the 1950s, strong short-term fluctuations of TP values were noted and explained by interactions between meteorological conditions, water column mixing and nutrient cycling in the lake.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleolimnology 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Institute of Geography 08 Faculty of Science > Institute of Geography > Physical Geography |
UniBE Contributor: |
Hernandez Almeida, Ivan, Grosjean, Martin |
Subjects: |
500 Science > 550 Earth sciences & geology 900 History > 910 Geography & travel |
ISSN: |
1730-413X |
Publisher: |
De Gruyter |
Language: |
English |
Submitter: |
Monika Wälti-Stampfli |
Date Deposited: |
18 May 2017 11:01 |
Last Modified: |
05 Dec 2022 15:05 |
Publisher DOI: |
10.1515/ohs-2017-0001 |
BORIS DOI: |
10.48350/99429 |
URI: |
https://boris.unibe.ch/id/eprint/99429 |
Actions (login required)
 |
Edit item |