Pollen-chemistry variations along elevation gradients and their implications for a proxy for UV-B radiation in the plant-fossil record

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dc.contributor.author Seddon, Alistair W. R.
dc.contributor.author Festi, Daniela
dc.contributor.author Nieuwkerk, Mayke
dc.contributor.author Gya, Ragnhild
dc.contributor.author Hamre, Borge
dc.contributor.author Kruger, Linn Cecilie
dc.contributor.author Ostman, Silje A. H.
dc.contributor.author Robson, T. Matthew
dc.date.accessioned 2021-08-10T11:40:01Z
dc.date.available 2021-08-10T11:40:01Z
dc.date.issued 2021-08
dc.identifier.citation Seddon , A W R , Festi , D , Nieuwkerk , M , Gya , R , Hamre , B , Kruger , L C , Ostman , S A H & Robson , T M 2021 , ' Pollen-chemistry variations along elevation gradients and their implications for a proxy for UV-B radiation in the plant-fossil record ' , Journal of Ecology , vol. 109 , no. 8 , pp. 3060-3073 . https://doi.org/10.1111/1365-2745.13720
dc.identifier.other PURE: 166841039
dc.identifier.other PURE UUID: 430c6b72-01cd-487f-be20-59d2c835009d
dc.identifier.other WOS: 000669619400001
dc.identifier.other ORCID: /0000-0002-8631-796X/work/98324830
dc.identifier.uri http://hdl.handle.net/10138/333013
dc.description.abstract Research indicates that phenolic compounds (e.g. para-coumaric acid) found within pollen grains may be useful as a proxy to reconstruct the UV-B radiation received at the Earth's surface in the geological past. However, application of this method to the plant-fossil record currently relies on a series of untested assumptions surrounding the ecological factors driving the response of pollen grains in the contemporary environment. Here, we investigate the relationship of Pinus spp. pollen to UV-B radiation using individuals of five populations sampled from three elevation gradients across Europe. We develop a novel radiation-modelling approach, which allows us to estimate the UV-B radiation dose of individual trees, weighted by different UV-B action spectra. We then use linear mixed-effects modelling to investigate: (a) whether the variations in UV-B-absorbing compounds in Pinus pollen are best described by models using coarser (subgenus) or finer (population) taxonomic levels; and (b) the duration of the period of accumulation of UV-B-absorbing compounds in pollen, ranging from 8 to 28 days. Our results demonstrate an overall positive relationship between para-coumaric acid and UV-B radiation, best described by applying a UV-B-accumulation period spanning 12-19 days. However, we also show clear evidence for population-level factors influencing this relationship across the study locations. Synthesis. Our multidisciplinary approach, which combines expertise from palaeoecology, plant physiology and atmospheric physics, provides clear evidence that pollen-grain chemistry is subject to population-level variations. We suggest that quantitative reconstructions of long-term changes in springtime UV-B radiation are still achievable using fossil reconstructions, but only with careful consideration of the factors leading to pollen representation in sediments. Future improvements are dependent on mechanistic understanding of the local factors which mediate the UV-B response across different populations, and on upscaling knowledge at the plant level to incorporate longer-term chemical variations represented within sediment samples. en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Journal of Ecology
dc.rights cc_by_nc
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject palaeoecology and land-use history
dc.subject para-coumaric acid
dc.subject Pinus spp
dc.subject pollen
dc.subject plant-climate interactions
dc.subject UV-B radiation
dc.subject UV-B-absorbing compounds
dc.subject SOURCE AREA
dc.subject SPORE
dc.subject DIVERSITY
dc.subject 11831 Plant biology
dc.subject 1181 Ecology, evolutionary biology
dc.title Pollen-chemistry variations along elevation gradients and their implications for a proxy for UV-B radiation in the plant-fossil record en
dc.type Article
dc.contributor.organization Canopy Spectral Ecology and Ecophysiology
dc.contributor.organization Viikki Plant Science Centre (ViPS)
dc.contributor.organization Biosciences
dc.contributor.organization Organismal and Evolutionary Biology Research Programme
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1111/1365-2745.13720
dc.relation.issn 0022-0477
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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