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Ökande antal övervintrande skogsfåglar i lappland 1986–2017 visar starkare samband med skogens utveckling än lokalt väder

Ferry, Björn ; Rune, Håkan ; Andersson, Ulf and Green, Martin LU (2020) In Ornis Svecica 30. p.13-30
Abstract

After a long period of decline, the number of forest birds has increased in Sweden in recent decades. Whether this trend is due to an increase in forested area, forest quality, climate change, or a combination of these factors, remains unclear. Here, we compared forest bird data from a local winter point count route around Storuman in Swedish Lapland between 1986 and 2017, with the development of regional forest composition and local weather conditions. We suggest that rather than changes in average annual, winter, or summer local temperatures or precipitation, the main drivers behind increasing numbers of wintering forest birds in this part of Sweden are an increase in the area of denser forest and dead wood volume, and a decrease in... (More)

After a long period of decline, the number of forest birds has increased in Sweden in recent decades. Whether this trend is due to an increase in forested area, forest quality, climate change, or a combination of these factors, remains unclear. Here, we compared forest bird data from a local winter point count route around Storuman in Swedish Lapland between 1986 and 2017, with the development of regional forest composition and local weather conditions. We suggest that rather than changes in average annual, winter, or summer local temperatures or precipitation, the main drivers behind increasing numbers of wintering forest birds in this part of Sweden are an increase in the area of denser forest and dead wood volume, and a decrease in open ground area without forest vegetation. While there may be supplementary explanations behind the increasing numbers of forest birds, such as reduced agriculture, decreasing local human population, or stronger photosynthesis, our results indicate that local land use has been favourable for forest birds in recent decades in this area.

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author
; ; and
organization
alternative title
Increasing numbers of wintering forest birds in swedish lapland 1986–2017 show stronger correlations with forest development than with local weather
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Climate change, Community Temperature Index, Forest variables, Long-term censusing, Point counts
in
Ornis Svecica
volume
30
pages
18 pages
publisher
Sveriges Ornitologiska Förening
external identifiers
  • scopus:85081117957
ISSN
1102-6812
DOI
10.34080/os.v30.19633
language
Swedish
LU publication?
yes
id
9ec11433-95a6-4d7f-b379-9192037653b6
date added to LUP
2021-01-11 13:15:55
date last changed
2021-01-11 13:15:55
@article{9ec11433-95a6-4d7f-b379-9192037653b6,
  abstract     = {<p>After a long period of decline, the number of forest birds has increased in Sweden in recent decades. Whether this trend is due to an increase in forested area, forest quality, climate change, or a combination of these factors, remains unclear. Here, we compared forest bird data from a local winter point count route around Storuman in Swedish Lapland between 1986 and 2017, with the development of regional forest composition and local weather conditions. We suggest that rather than changes in average annual, winter, or summer local temperatures or precipitation, the main drivers behind increasing numbers of wintering forest birds in this part of Sweden are an increase in the area of denser forest and dead wood volume, and a decrease in open ground area without forest vegetation. While there may be supplementary explanations behind the increasing numbers of forest birds, such as reduced agriculture, decreasing local human population, or stronger photosynthesis, our results indicate that local land use has been favourable for forest birds in recent decades in this area.</p>},
  author       = {Ferry, Björn and Rune, Håkan and Andersson, Ulf and Green, Martin},
  issn         = {1102-6812},
  language     = {swe},
  pages        = {13--30},
  publisher    = {Sveriges Ornitologiska Förening},
  series       = {Ornis Svecica},
  title        = {Ökande antal övervintrande skogsfåglar i lappland 1986–2017 visar starkare samband med skogens utveckling än lokalt väder},
  url          = {http://dx.doi.org/10.34080/os.v30.19633},
  doi          = {10.34080/os.v30.19633},
  volume       = {30},
  year         = {2020},
}