PollChem

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    Boris Zimmermann

Pollen Chemistry as the Next Generation Tool in Palaeoecological Research – Theory, Methods and Applications

PollChem project

Research Council of Norway 

NFR FRIMEDBIO
Project No: 249844
Period covered - start date: 01/10/2016
Period covered - end date: 30/09/2020
Project Administrator: Alistair Seddon, University of Bergen
NMBU principal researcher: Boris Zimmermann

 

The projected environmental changes of the 21st century will have profound impacts on Earth's biodiversity and its associated ecosystem functions, but basic, baseline information related to drivers of change and their variability is lacking for many ecosystems. Palaeoecology uses the plant remains (e.g. fossil pollen) preserved in lake sediments to fill this critical knowledge gap. Sediments are natural data-loggers, but information obtained from sediments is limited by current techniques. There is a need for new tools and methods to generate novel ecological insights from the information from sediment cores.

PollChem works at the frontiers of a new and emerging technique with the potential to trigger the next revolution in palaeoecology. Recent studies indicate that the chemical constituents of pollen respond to changes in environmental conditions and are also reflective of phylogenetic patterns. Since components of this pollen-chemical signature can remain preserved in sediments over thousands of years, pollen chemistry has the potential to provide new and unparalleled levels of detail for a range of palaeoecological applications. PollChem provides, for the first time, an integrated framework which implements the full scope of pollen chemistry techniques to three major palaeoecological applications: 1) Reconstruction of ultra-violet radiation (UV-B) for the past 100 years from a varved sediment sequence to provide a validation-through-time test for a new pollen-based UV-B proxy; 2) Reconstruction of UV-B across the Permian-Triassic transition (ca. 252 million years ago), where UV-B exposure has been proposed as a key extrinsic driver of mass-extinction; and 3) Investigation of whether species differences in pollen chemistry can improve taxonomic precision within a palaeoecological forest-fire model system. 

 

Literature:

Seddon A.W.R., Festi D., Robson T.M., Zimmermann B. 
Fossil pollen and spores as a tool for reconstructing ancient solar-ultraviolet irradiance received by plants: an assessment of prospects and challenges using proxy-system modelling.
Photochemical and Photobiological Sciences 18 (2019) 275.

Published 15. February 2016 - 20:16 - Updated 24. May 2019 - 15:53