Abstract
The pollen diagram for a peat bog near Col Blegier (2350 m a.s.l.) can be divided into 3 pollen zones: the oldest part (SAL 1) is characterised by a maximum of pine pollen (Pinus mugo/sylvestris type, with a little P. cembra-t.), suggesting local occurrence of sub-Alpine scrub. An intermediate zone (SAL 2) shows an abrupt drop in the pollen concentration, interpreted as a reduction of pine scrub near the site. Pollen zone SAL 3 coincided with the beginning of peat deposition, with an increase of heliophilous species and many taxa typical of Alpine grasslands, as well as anthropogenic indicators. The middle of zone SAL 3 has a radiocarbon date of 1360 ± 60 B.P., calibrated to A.D. 640-685. The most interesting aspect may be the proof of the presence of a mountain pine scrub, which in the late Atlantic reached the ridge and surrounded what then was a small lake on a pass. Interpretation of the diagram was aided by the pollen analysis of moss polsters taken from the edge of the peat bog.
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Claims 4
Claim · model-written summary
The oldest pollen zone had maximum pine pollen, suggesting local sub-Alpine scrub.
- Taxon
- Pinus mugo/sylvestris
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Pinus mugoe0 - Outcome
- maximum of pine pollene0
- Direction
- maximume0
- Setting
- SAL 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“the oldest part (SAL 1) is characterised by a maximum of pine pollen (Pinus mugo/sylvestris type, with a little P. cembra-t.), suggesting local occurrence of sub-Alpine scrub.”
Claim · model-written summary
SAL 2 showed a sharp decline in pollen concentration, interpreted as reduced nearby pine scrub.
PinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An intermediate zone (SAL 2) shows an abrupt drop in the pollen concentration, interpreted as a reduction of pine scrub near the site.”
Claim · model-written summary
SAL 3 coincided with peat deposition and an increase in heliophilous and Alpine grassland species and anthropogenic indicators.
Verbatim
e0“Pollen zone SAL 3 coincided with the beginning of peat deposition, with an increase of heliophilous species and many taxa typical of Alpine grasslands, as well as anthropogenic indicators.”
Claim · model-written summary
Mountain pine scrub reached the ridge and surrounded a small lake during the late Atlantic.
- Taxon
- mountain pinePinus mugoe0
- Outcome
- presence of a mountain pine scrube0
- Qualifier
- in the late Atlantice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“presence of a mountain pine scrub, which in the late Atlantic reached the ridge and surrounded what then was a small lake on a pass.”