| Title |
Tree and Shrub Expansion Over the Past 34 Years at the Tree-Line Near Abisko, Sweden
|
|---|---|
| Published in |
Ambio, August 2011
|
| DOI | 10.1007/s13280-011-0174-0 |
| Pubmed ID | |
| Authors |
Sara Rundqvist, Henrik Hedenås, Anneli Sandström, Urban Emanuelsson, Håkan Eriksson, Christer Jonasson, Terry V Callaghan |
| Abstract |
Shrubs and trees are expected to expand in the sub-Arctic due to global warming. Our study was conducted in Abisko, sub-arctic Sweden. We recorded the change in coverage of shrub and tree species over a 32- to 34-year period, in three 50 x 50 m plots; in the alpine-tree-line ecotone. The cover of shrubs and trees (<3.5 cm diameter at breast height) were estimated during 2009-2010 and compared with historical documentation from 1976 to 1977. Similarly, all tree stems (> or =3.5 cm) were noted and positions determined. There has been a substantial increase of cover of shrubs and trees, particularly dwarf birch (Betula nana), and mountain birch (Betula pubescens ssp. czerepanovii), and an establishment of aspen (Populus tremula). The other species willows (Salix spp.), juniper (Juniperus communis), and rowan (Sorbus aucuparia) revealed inconsistent changes among the plots. Although this study was unable to identify the causes for the change in shrubs and small trees, they are consistent with anticipated changes due to climate change and reduced herbivory. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 3 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 2 | 67% |
| Members of the public | 1 | 33% |
Mendeley readers
The data shown below were compiled from readership statistics for 152 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Netherlands | 1 | <1% |
| Norway | 1 | <1% |
| Austria | 1 | <1% |
| Sweden | 1 | <1% |
| United Kingdom | 1 | <1% |
| Estonia | 1 | <1% |
| Russia | 1 | <1% |
| United States | 1 | <1% |
| Unknown | 144 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 33 | 22% |
| Student > Master | 31 | 20% |
| Researcher | 23 | 15% |
| Student > Bachelor | 17 | 11% |
| Student > Doctoral Student | 5 | 3% |
| Other | 16 | 11% |
| Unknown | 27 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 57 | 38% |
| Agricultural and Biological Sciences | 43 | 28% |
| Earth and Planetary Sciences | 14 | 9% |
| Unspecified | 3 | 2% |
| Business, Management and Accounting | 1 | <1% |
| Other | 5 | 3% |
| Unknown | 29 | 19% |
Attention Score in Context
This research output has an Altmetric Attention Score of 8. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 November 2022.
All research outputs
#4,499,159
of 26,017,215 outputs
Outputs from Ambio
#829
of 1,954 outputs
Outputs of similar age
#23,416
of 138,791 outputs
Outputs of similar age from Ambio
#4
of 17 outputs
Altmetric has tracked 26,017,215 research outputs across all sources so far. Compared to these this one has done well and is in the 81st percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,954 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 16.2. This one has gotten more attention than average, scoring higher than 57% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 138,791 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 81% of its contemporaries.
We're also able to compare this research output to 17 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 76% of its contemporaries.