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Topics and sessions > Topic II - New approaches in palaeolimnology

II-1-New perspectives and findings in paleolimnology using environmental ancient DNA

Conveners

  1. Kathleen R. Stoof-Leichsenring (Polar Terrestrial Environmental Systems, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany), Kathleen.Stoof-Leichsenring@awi.de
  2. Laura S. Epp (Limnological Institute, Department of Biology, University of Konstanz, Konstanz, Germany)
  3. Charline Giguet-Covex (EDYTEM, CNRS, University Savoie Mont Blanc, Le Bourget du Lac, France)
  4. Maïlys Picard (Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden)
  5. Stanislav Jelavić (Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, Grenoble, France)
  6. Antony G. Brown (The Arctic University Museum of Norway, UiT the Arctic University of Norway, 9010 Tromsø, Norway 

Environmental ancient DNA has emerged as a molecular proxy for reconstructing past environments and ecosystems. Particularly, within the fields of paleolimnology and limnogeology, sedimentary ancient DNA (sedaDNA) has been widely used to investigate the genetic material preserved in sediment records. SedaDNA time-series data deliver detailed histories of species, ecosystems, and their relationship with climate and environmental changes, and human activities over decadal to millennial timescales. Our session invites presenters sharing their latest insights on a variety of sedaDNA related topics, such as: laboratory advances and innovative bioinformatic and statistical tools (including network statistics and AI). We encourage contributions with a special focus on the implications of DNA preservation and recovery for long-term paleo-reconstructions. While most sedaDNA records originate from cold or temperate environments, studies from subtropical and tropical areas, highlighting both challenges and successes, are very welcome.

 
 
 

II-2-Ecosystem change meets databases: upscaling patterns, trends, and dynamics to regional and continental scales

Conveners

  1. Stefan Engels (School of Social Sciences, Birkbeck University of London, UK), s.engels@bbk.ac.uk
  2. Agnieszka Gruszczyńska (Faculty of Physics and Earth System Sciences, Leipzig University, Germany  & Polish Academy of Sciences, Stanisław Leszczycki Institute of Geography and Spatial Organisation, Poland) 
  3. Maria Lujan Garcia (Institute of Geography, University of Bremen, Germany)
  4. Xavier Benito (Marine and Continental Waters Program, Institute of Agrifood Research and Technology, IRTA, Spain)

Knowledge of past ecosystem states and dynamics, tipping points and disturbance regimes is urgently needed to inform aquatic ecosystem restoration and management targets. Palaeoecological research has provided important insights into past ecosystem changes, but its potential is hindered by limited data availability and lack of standardized sharing practices. At present only a small part of the underlying data is available in the public domain and/or it is not being mobilized using community coordinated practices. The recent push for more OPEN and FAIR data means that palaeoecological data are increasingly made openly available, e.g. through community-built databases and data-sharing platforms such as the LiPDverse, the European Pollen Database, Neotoma or Pangea. This session will explore advances in FAIR and OPEN data sharing and invites contributions (e.g., case studies, data analysis tools, meta-analyses) that showcase the exciting research that is made possible by the analysis of ecosystem dynamics at regional to continental scales and spanning different temporal ranges.

 

 

II-3-Sediment inorganic geochemistry: methodological developments and applications in paleolimnology

Conveners

  1. Sebastien Bertrand (GEOPS, Paris-Saclay University, Orsay, France, & Renard Centre of Marine Geology, Ghent University, Gent, Belgium), sebastien.bertrand@universite-paris-saclay.fr
  2. Rik Tjallingii (Section Climate Dynamics and Landscape Evolution, GFZ German Research Centre for Geosciences, Potsdam, Germany)
  3. Malin Kylander (Department of Geological Sciences and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden)

Inorganic geochemistry is a powerful tool in paleolimnology. It has become one of the most commonly used techniques to analyze lake sediments, particularly due to the continuous development and increasing availability of XRF core scanners over the last two decades. Inorganic geochemical measurements allow for the reconstruction of the long-term processes that occur in lakes and their watersheds, as well as the identification of event deposits, such as those representing floods, volcanic eruptions, earthquakes, etc. In this session, we invite a broad range of contributions related to all aspects of sediment inorganic geochemistry, from sample preparation to statistical analysis of geochemical datasets, including analytical developments, novel methods and software packages for data processing, and new proxies. This session also welcomes contributions focusing on inter-comparisons and cross-calibrations between instruments and is not limited to XRF core scanning. In addition, we encourage papers that present applications of inorganic geochemical techniques to lake sediments in order to reconstruct past environmental changes, as well as those that explore the potential and pitfalls of inorganic geochemistry in paleolimnology. This session is linked to a short course on XRF core scanning organized at the 2025 IPA-IAL conference. 

 
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