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Too early and too northerly: evidence of temperate trees in northern Central Europe during the Younger Dryas
Author(s) -
Robin Vincent,
Nadeau MarieJosée,
Grootes Pieter M.,
Bork HansRudolf,
Nelle Oliver
Publication year - 2016
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.13844
Subject(s) - younger dryas , temperate climate , beech , range (aeronautics) , latitude , temperate rainforest , period (music) , allerød oscillation , glacial period , physical geography , temperate forest , biogeography , geography , ecology , geology , paleontology , biology , forestry , ecosystem , materials science , physics , geodesy , composite material , acoustics
Summary This paper presents highly unexpected paleobotanical data. Eight 14 C‐accelerator mass spectrometry ( AMS ) dates of soil macrocharcoal pieces, identified taxonomically, indicate the presence of oak and beech in the Younger Dryas, and pine in the Allerød, in the northernmost low mountain range of Central Europe, the Harz Mountains, in Germany. If the presence of pine at such latitude and periods is not surprising, the presence of temperate‐adapted trees is highly improbable, because they are assumed to have reached the area from a southern location several thousand years later. Two hypotheses are postulated to explain this record. Both are related to the warm periods of the Bølling and Allerød: the classically ‘short’ duration of this warm period makes the migration of the temperate trees from the identified refuge areas in the southern location implausible, and so the presence of intermediary microrefugia at a medium latitude in Central Europe is postulated; recent data reveal that the warm period of the Late Glacial phase was much longer than considered in the classical view and, thus, would be long enough for a northward migration of temperate‐adapted trees. Although our dataset does not permit disentanglement of these hypotheses, it provides significant innovative insights for the biogeography of Central Europe.