New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

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Denk, ThomasNaturhistoriska riksmuseet,Enheten för paleobiologi (författare)

New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

Artikel/kapitelEngelska2021

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2021-08-29
John Wiley & Sons,2021
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:nrm-4500
https://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4500URI
https://doi.org/10.1002/ajb2.1716DOI

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Språk:engelska
Sammanfattning på:engelska

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Premise: The Fagaceae comprise around 1000 tree species in the Northern Hemisphere.Despite an extensive fossil pollen record, reconstructing biogeographic patternsis hampered because it is difficult to achieve good taxonomic resolution withlight microscopy alone. We investigate dispersed pollen of Fagaceae from the Miocene Søby flora, Denmark. We explore the latitudinal gradient in Fagaceae distribution during the Miocene Climatic Optimum (MCO) in Europe and the Northern Hemisphere to compare it with the Eocene Warmhouse and the present.Methods: We investigated dispersed pollen using light and scanning electron microscopy. We assessed biogeographic patterns in Fagaceae during two warm periods in Earth history (MCO, Eocene) and the present.Results: Eight species of Fagaceae were recognized in the Søby flora. Of these, Fagus had a continuous Mediterranean to subarctic distribution during MCO; Quercus sect. Cerris and castaneoids had northern limits in Denmark, and evergreen Quercus sect. Ilex in Central Europe. In a northern hemispheric context, Fagus and sections of Quercus had more northerly distribution limits during Eocene and MCO with maximum northward extensions during Eocene (Fagus, castaneoids) or Oligo‐Miocene (Quercus sects. Cerris and Ilex). The known distribution of the extinct Tricolporopollenites theacoides during MCO included Central Europe and East China, while this taxon thrived in South China during Eocene.Conclusions: More northerly distributions during MCO and Eocene probably were determined by temperature. In contrast, fossil occurrences in areas that are arid or semi‐humid today were determined by maritime conditions in these areas (western North America, Central Asia) during the Cenozoic.

Ämnesord och genrebeteckningar

NATURVETENSKAP Geovetenskap och miljövetenskap Annan geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Other Earth and Related Environmental Sciences hsv//eng
Fagus
Fususpollenites fusus
middle Miocene
Northern Hemisphere
paleobotany
paleopalynology
Quercus
scanning electron microscopy
Tricolporopollenites pseudocingulum
Tricolporopollenites theacoides
Ecosystems and species history
Ekosystem och arthistoria
The changing Earth
Den föränderliga jorden

Biuppslag (personer, institutioner, konferenser, titlar ...)

Bouchal, Johannes M.,1979- (författare)
Naturhistoriska riksmuseetEnheten för paleobiologi (creator_code:org_t)

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Ingår i:American Journal of Botany: John Wiley & Sons108, s. 1500-15240002-91221537-2197

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Av författaren/redakt...: Denk, Thomas; Bouchal, Johanne ...

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