Compositional turnover and variation in Eemian pollen sequences in Europe

Vivian A. Felde (1, 2) , Suzette G.A. Flantua (1) , Cathy R. Jenks (1) , Blas M. Benito (1) , Jacques-Louis de Beaulieu (3) , Petr Kuneš (4) , Donatella Magri (5) , Dorota Nalepka (6) , Bjørg Risebrobakken (7) , Cajo J.F. ter Braak (8) , Judy R.M. Allen (9) , Wojciech Granoszewski (10) , Karin F. Helmens (11) , Brian Huntley (9) , Ona Kondratienė (12) , Laimdota Kalniņa (13) , Mirosława Kupryjanowicz (14) , Małgorzata Malkiewicz (15) , Alice M. Milner (16) , Małgorzata Nita (17) , Bożena Noryśkiewicz (18) , Irena A. Pidek (19) , Maurice Reille (3) , Sakari J. Salonen (20) , Vaida Šeirienė (12) , Hanna Winter (21) , Polychronis C. Tzedakis (22) , John H.B. Birks (2, 1, 22)

1 BIO / UiB - Department of Biological Sciences [Bergen]
2 BCCR - Bjerknes Centre for Climate Research
3 IMBE - Institut méditerranéen de biodiversité et d'écologie marine et continentale
4 UK - Univerzita Karlova [Praha, Česká republika] = Charles University [Prague, Czech Republic]
5 UNIROMA - Università degli Studi di Roma "La Sapienza" = Sapienza University [Rome]
6 Department of Palaeobotany, W. Szafer Institute of Botany, Polish Academy of Sciences
7 Uni Research Climate
8 Biometris, Wageningen University and Research
9 Department of Biosciences
10 Polish Geological Institute, National Research Institute, Carpathian Branch
11 Stockholm University
12 Nature Research Centre, Institute of Geology and Geography
13 LU - University of Latvia
14 Department of Palaeobotany, Institute of Biology, University of Białystok
15 Laboratory of Paleobotany, Department of Stratigraphical Geology, Institute of Geological Sciences, University of Wrocław
16 Department of Geography, Royal Holloway
17 Department of Fundamental Geology, Faculty of Earth Sciences, University of Silesia
18 Nicolaus Copernicus University [Toruń]
19 Faculty of Earth Sciences and Spatial Management, M. Curie Skłodowska University
20 Department of Geosciences and Geography [Helsinki]
21 Polish Geological Institute
22 UCL - University College of London [London]

The Eemian interglacial represents a natural experiment on how past vegetation with negligible human impact responded to amplified temperature changes compared to the Holocene. Here, we assemble 47 carefully selected Eemian pollen sequences from Europe to explore geographical patterns of (1) total compositional turnover and total variation for each sequence and (2) stratigraphical turnover between samples within each sequence using detrended canonical correspondence analysis, multivariate regression trees, and principal curves. Our synthesis shows that turnover and variation are highest in central Europe (47-55°N), low in southern Europe (south of 45°N), and lowest in the north (above 60°N). These results provide a basis for developing hypotheses about causes of vegetation change during the Eemian and their possible drivers.

Mots clés: Multivariate regression trees; Inertia; Principal curves; Extrinsic and intrinsic processes; Detrended canonical correspondence analysis; Neutral processes; Last interglacial dataset

Domaines: Sciences de l'environnement

Vivian A. Felde, Suzette G.A. Flantua, Cathy R. Jenks, Blas M. Benito, Jacques-Louis de Beaulieu, et al.. Compositional turnover and variation in Eemian pollen sequences in Europe. Vegetation History and Archaeobotany, 2020, 29 (1), pp.101-109. ⟨10.1007/s00334-019-00726-5⟩. ⟨hal-02091016⟩