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The Pleistocene flora of Bezhan, southeast Albania: early appearance of extant tree species
Naturhistoriska riksmuseet, Enheten för paleobiologi.ORCID-id: 0000-0001-9535-1206
2021 (Engelska)Ingår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 33, s. 283-305Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The piggyback basin of Bezhan, southeastern Albania, was formed during the late Neogene and contains Pliocene/Pleistocene deposits. These continental deposits consist of marls, siltstones and clays separated by a thin series of lignite-seams alternating with clays (Bezhan formation). We investigated leaf fossils and dispersed pollen from marls of the upper portion of this formation. Fifty-two plant taxa comprising algae, gymnosperms, and angiosperms were recovered. Of these, at least 19% belong to extant species and less than 16% belong to taxa today extinct in western Eurasia. Tsuga is represented by three pollen taxa with affinities to modern Chinese, Japanese, and North American species. Herbaceous taxa indicative of steppe (Artemisia, Amaranthaceae) occur in low quantities (≤1%)suggesting an interglacial setting. Four vegetation units are recognised: Wet riparian and aquatic vegetation, mesic oak forest, dry sub-Mediterranean woodland, and montane conifer forest. A comparison of the Bezhan flora with well-dated Pliocene and Pleistocene floras of Italy suggests a Calabrian (late early Pleistocene) age for the upper unit. This estimate is based on the abundance of extant taxa, the absence of subtropical taxa, and threshold values of particular taxa (Tsuga, Carya). The findings are in agreement with age estimates for extant tree species from molecular studies.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2021. Vol. 33, s. 283-305
Nyckelord [en]
Plant macrofossils, pollen, Quercus cerris, sub-Mediterranean vegetation belt, extant tree species, Calabrian
Nationell ämneskategori
Naturvetenskap Annan geovetenskap och miljövetenskap
Forskningsämne
Ekosystem och arthistoria; Den föränderliga jorden
Identifikatorer
URN: urn:nbn:se:nrm:diva-4504DOI: 10.1080/08912963.2019.1615061OAI: oai:DiVA.org:nrm-4504DiVA, id: diva2:1618561
Forskningsfinansiär
Vetenskapsrådet, 2015‐ 03986Tillgänglig från: 2021-12-09 Skapad: 2021-12-09 Senast uppdaterad: 2021-12-10Bibliografiskt granskad

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Förlagets fulltexthttps://doi.org/10.1080/08912963.2019.1615061

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Denk, Thomas
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Historical Biology
NaturvetenskapAnnan geovetenskap och miljövetenskap

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