Environmental Change Reconstruction Laboratory

...all that happens today is the product of what happened yesterday.


On July 25th-31st the 20th INQUA Congress was held in Dublin, Ireland. Among almost 3,000 participants from all around the world, our lab was represented by Małgorzata Kinder, Anna Poraj-Górska and Maurycy Żarczyński. We co-authored several oral and poster presentations.

Oral presentations:
Nathalie Fagel, Pablo Pedreros, Denisse Alvarez, Wojciech Tylmann, Alberto Araneda, Sabine Schmidt, Philippe Martinez, Roberto Urrutia
Reconstruction of precipitation changes over the last 800 years in NE Patagonia: the varved Lake Jeinimeni record (46.5°S, Chile)

Małgorzata Kinder, Sabine Wulf
New distal cryptotephra findings in annually laminated lacustrine sediments of northern Poland

Paul Zander, Martin Grosjean, Wojciech Tylmann, Maurycy Żarczyński, Agnieszka Wacnik
High-resolution multi-proxy reconstruction of Holocene productivity and lake mixing dynamics, Lake Żabińskie, Poland

Małgorzata Kinder, Wojciech Tylmann, Michał Rzeszewski, Bernd Zolitschka
Sedimentation dynamics in multi-millennial lacustrine record: varves and slumps in Lake Szurpiły (NE Poland)

Stamatina Makri, Wojciech Tylmann, Hendrik Vogel, Martin Grosjean
Investigating meromixis dynamics in varved lake sediments of Lake Jaczno, Poland using high-resolution hyperspectral imaging and XRF data

Anna Poraj-Górska, Magdalena Suchora, Agnieszka Szczerba, Wojciech Tylmann
Recent eutrophication and deposition of varved sediments in lakes: case study of Lake Dubie in northwestern Poland

Giulia Wienhues, Wojciech Tylmann, Hendrik Vogel, Stamatina Makri
A Holocene high-resolution multi-proxy record of aquatic productivity, soil erosion and meromixis from varved Lake Rzesniki, NE Poland

Paul Zander, Darrell Kaufman, Martin Grosjean, Sönke Szidat, Maurycy Żarczyński, Anna Poraj-Górska
Radiocarbon dating in lake sediments: assessing the usefulness of very small samples using the Mini Carbon Dating System (MICADAS)

Maurycy Żarczyński, Dirk Enters, Wojciech Tylmann
Fe and Mn in lake sediments: spatiotemporal patterns and potential for redox reconstructions – a multicore study from Lake Łazduny (Poland)

Gdansk University team at INQUA Congress in Dublin

Gosia presenting her results from Lake Szurpiły

Ania and Maurycy presenting their posters


In the frame of ongoing research projects in ECRLab we organized a meeting with our collaborators from Switzerland. On June 24-27th 2019 we hosted a group of paleolimnologists from the University of Bern: Prof. Martin Grosjean, Stamatina Makri, Andrea Sanchini, Giulia Wienhues, and Paul Zander.

The meeting provided a chance to present the ongoing research works related to the following projects funded by NCN and SNF:
1. Tracking climate signals preserved in lake sediments from integrated process studies and ultra high-resolution analysis of annually laminated sediments
2. Exploring VNIR/SWIR Hyperspectral Imaging of Varved Lake Sediments: Methods and Applications
3. Laminated lake sediments as an indicator of recently induced anoxia in lakes of northern Poland
4. Tracking cryptotephra: toward developing a tool for precise stratigraphic correlation of lacustrine records in northern Poland (TEPHRA)

We also visited the Marine Station in Hel which is part of our Faculty.


On June 18th, Maurycy Żarczyński presented results of his PhD thesis in the Institute of Geography, Pedagogical University of Cracow. The presentation was part of the cooperation with Prof. Jacek Szmańda and his research group concerning mainly particle size analyses of sediments.


On May 31st, Maurycy Żarczyński presented results of his PhD thesis in the Department of Environmental Resources and Geohazards, Institute of Geography and Spatial Organization PAS in Toruń. The presentation was invited by prof. Mirosław Błaszkiewicz, the leader of the depertment.


On May 26-29th Anna Poraj-Górska and Maurycy Żarczyński attended an international workshop “Funding starts here. Grant writing workshop for early-career researchers”, which was organized in Prague by PAGES Early-Career Network. The goal of the workshop was to familiarize early-career researchers from all over the world with the possibilities and procedures of grant submission to institutions like European Research Council or National Science Fundation.


We have just come back from Romania where we tried to collect sediment cores from mountain lakes Sureanu and Colibita. The cooperation with colleagues from Babes Bolyai University in Cluj-Napoca looks very exciting. We are planning to combine results from lake sediments and tree rings to reconstruct frequency of avalanches and sedimentation rates in lakes. Our colleagues form Romania (Olimpiu Pop and Ionela Rachita) are acknowledged for taking care of us and nice time in the field!


Public defense of the dissertation “Environmental change during the last 2000 years recorded in microfacies and geochemistry of varved sediments from Lake Żabińskie (northeastern Poland)” presented by Maurycy Żarczyński took place at the Institute of Geography on 25 April 2019. One day later he formally received his PhD degree in geography at the Faculty of Oceanography and Geography, Gdańsk University.


On March 18-19th Paleolimnology Session was held at the Institute of Biology, University of Bialystok. This year, the main topic focused on lacustrine sediment records from interglacials older than the Holocene. Our lab presented one oral presentation and five posters about ongoing research in northern Poland.

Oral presentations:
Małgorzata Kinder
Dystal cryptotephra in laminated lake sediments from northern Poland

Magdalena Suchora, Anna Poraj-Górska, Wojciech Tylmann, Maurycy Żarczyński
Varves, cladocerans and big eutrophication – what has happened in Lake Dubie

Anna Poraj-Górska, Wojciech Tylmann
Geochemical record of the recent transition from massive to laminated sediments in three northern Polish lakes

Maurycy Żarczyński, Wojciech Tylmann, Dirk Enters
Fe and Mn in sediments of Lake Łazduny: spatiotemporal variability and potential for redox reconstructions

Paulina Głowacka, Agnieszka Szczerba, Wojciech Tylmann
Variability of modern sedimentation in lakes Łazduny and Rzęśniki (Masurian Lakeland)

Agnieszka Szczerba, Paulina Głowacka, Monika Rzodkiewicz, Sergi Pla-Rabes, Wojciech Tylmann
Seasonal changes in biological composition of sediments from Lake Łazduny


New paper about holocene history of human impacts in northeast Poland has just been published in Journal of Paleolimnology. In this publication, we took full advantage of the well-preserved biogenic varves and analyses of multiple sediment variables. The pollen record was used to track deforestation and agriculture whereas analyses of diatoms, cladocerans, sedimentology, element geochemistry and stable isotopes enabled us to track lacustrine processes that responded to changing human impact. Happy reading!

Kinder M., Tylmann W., Bubak I., Fiłoc M., Gąsiorowski M., Kupryjanowicz M., Mayr C., Sauer L., Voellering U., Zolitschka B. 2019 Holocene history of human impacts inferred from annually laminated sediments in Lake Szurpiły, northeast Poland. Journal of Paleolimnology. DOI 10.1007/s10933-019-00068-2. LINK


From January 20th till February 9th Agnieszka Szczerba received scientific training on chrysophyte cyst analysis at CREAF- Ecological and Forestry Applications Research Centre in Spain. Her stay in Barcelona was supervised by dr Sergi Pla-Rabes. The training was the part of a project for PhD students and young scientists entitled „Chrysophyte cyst analysis as a tool for high-resolution reconstructions of environmental changes” (number 528-G110-B095-18).


New paper about Lake Żabińskie has been published in Quaternary. In this publication, we analyze grain size distributions in these biogenic sediments and show the variability of textural characteristics in different varve microfacies. Happy reading!

Żarczyński M., Szmańda J., Tylmann W. 2019 Grain-Size Distribution and Structural Characteristics of Varved Sediments from Lake Żabińskie (Northeastern Poland). Quaternary, 2, 8. DOI 10.3390/quat2010008 LINK


New paper about Lake Żabińskie has been published in Science of the Total Environment. In this publication, we show how the variability of varve microfacies and Fe/Mn ratio can be interpreted in the context of land use changes, lake mixing and oxygenation regimes over the last two millennia. Happy reading!

Żarczyński M., Wacnik A., Tylmann W. 2019 Tracing lake mixing and oxygenation regime using the Fe/Mn ratio in varved sediments: 2000 year-long record of human-induced changes from Lake Żabińskie (NE Poland). Science of the Total environment, 657: 585–596. DOI 10.1016/j.scitotenv.2018.12.078. LINK


From December 1st, Karolina Molisak joined our ECRLab team. She took up a position of lab assistant. Karolina graduated from Gdansk University of Technology where she studied biotechnology at the Faculty of Chemistry. Welcome on board!


On Monday December 3rd, Prof. Nathalie Fagel from the University of Liege (Belgium) delivered a talk about her research project in Chile: Geochemical record of Lake Jeinimeni & environmental variability over the last centuries in Northern Chilean Patagonia. Lake Jeinimeni is one of very few varved sites in this part of Patagonia. Our lab is responsible for varve counting and establishing chronological framework for this sediment record. We are happy to be involved in this exciting project.


On Thursday November 9th, Dr. hab. Michał Słowiński from the Institute of Geography and Spatial Organization (PAS in Warsaw) delivered a talk about paleoecological record of extreme events in lake sediments. After the 2012 tornado in northern Poland, Michał collected several cores form lakes in the Tuchola Forest. Sediment core from Lake Kałębie investigated by Michał was dated in our lab with Pb-210/Cs-137 method. We are happy to be involved in this exciting project.