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All figures (9)
Fig. 3. Repeat aerial photograph analysis on Mount Nuolja in sub-Arctic Sweden.
Fig. 2. Tree line site S4 on the south side of Lake Torneträsk in 1912 and 2009. The
Fig. 1. The Torneträsk study area in sub-Arctic Sweden. The locations of the
Fig. 6. Orographic tree line sites with an inclination >35° showed long-term stability.
Fig. 5. Comparison of the tree line transects N1, N2, and S1 visited in 1977 and 2006.
Fig. 7. Estimated annual birch recruitment at the tree line of Mount Nuolja (a) in
Table 4. Significant (P < 0.05) disturbance events at the tree line in the Swedish Torneträsk area for the period 1800–2006. The geographical scale of the study ranged from an individual mountain (Mount Nuolja, site MS3) to the landscape scale (sites N1, N2 and S1). Ring-width chronologies of birch and pine individuals sampled below the tree line ecotone were used as a reference. Major disturbance events are given in bold and were defined as events that affected 50% or more of the tree line individuals in two or more different sites. The number of replicates is given in brackets. Note that the list of disturbance events is not exhaustive, particularly for the period 1800–1900 for which fewer replicates were available.
Fig. 8. Tree (>2 m) establishment at the Torneträsk tree line versus summer (June-
Fig. 4. The tree line ecotone near transect N1 on the northern side of Lake Torneträsk
Journal Article
•
DOI
•
A century of tree line changes in sub-Arctic Sweden shows local and regional variability and only a minor influence of 20th century climate warming
[...]
Rik Van Bogaert
1
,
Kristof Haneca
1
,
Jan Hoogesteger
2
,
Christer Jonasson
3
,
Christer Jonasson
4
,
Morgan De Dapper
1
,
Terry V. Callaghan
5
,
Terry V. Callaghan
4
- Show less
+4 more
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Institutions (5)
Ghent University
1
,
University of Helsinki
2
,
Uppsala University
3
,
Royal Swedish Academy of Sciences
4
,
University of Sheffield
5
01 May 2011
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Journal of Biogeography