Patterns of variation in late-glacial pollen stratigraphy along a northwest-southeast transect through Switzerland - A numerical analysis

Ammann, Brigitta; Birks, H.J.B.; Drescher-Schneider, Ruth; Juggins, Steve; Lang, Gerhard; Lotter, André F. (1993). Patterns of variation in late-glacial pollen stratigraphy along a northwest-southeast transect through Switzerland - A numerical analysis. Quaternary Science Reviews, 12(5), pp. 277-286. Pergamon 10.1016/0277-3791(93)90036-L

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Palynological data from seven late-glacial sites on a transect from the Swiss Plateau, through the North and Central Alps to the South Alps are analysed numerically. Constrained classification procedures were used to derive local pollen-assemblage zones for each site. Detrended correspondence analysis was used to compare pollen-stratigraphical similarities and differences within and between sites and to estimate the amount of palynological change at each site. Canonical correspondence analysis was used to display graphically patterns of variation between local zones within the sites and between the seven sites, and to partition the total palynological variance into within-site temporal variation and between-site spatial variation. The numerical results suggest that no two sites have identical late-glacial pollen stratigraphies, that the South Alps site has a very different pollen stratigraphy compared with the other sites, that the major spatial patterns of variation correspond to site location, and thus that there was considerable variation in late-glacial pollen rain along the transect, just as there is today. The total palynological variance is partitioned into 73% temporal variance, 13.2% spatial variance and 13.8% unexplained variance. The Younger Dryas ‘event’ is poorly reflected in the South Alps but is well reflected as a palynological revertence towards pre-Allerød assemblages at mid- and high-elevation sites in the North and Central Alps. It is also well reflected as changes in pollen composition at one site on the Swiss Plateau, but is poorly reflected at a nearby site on the Swiss Plateau.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Palaeoecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Ammann, Brigitta; Lang, Gerhard and Lotter, André Franz

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0277-3791

Publisher:

Pergamon

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

15 Jan 2018 12:11

Last Modified:

15 Jan 2018 12:11

Publisher DOI:

10.1016/0277-3791(93)90036-L

BORIS DOI:

10.7892/boris.102032

URI:

https://boris.unibe.ch/id/eprint/102032

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