Ecosystem change and stability over multiple decades in the Swedish subarctic: complex processes and multiple drivers

Research output: Contribution to journalArticle

Abstract

The subarctic environment of northernmost Sweden has changed over the past century, particularly elements of climate and cryosphere. This paper presents a unique geo-referenced record of environmental and ecosystem observations from the area since 1913. Abiotic changes have been substantial. Vegetation changes include not only increases in growth and range extension but also counterintuitive decreases, and stability: all three possible responses. Changes in species composition within the major plant communities have ranged between almost no changes to almost a 50 per cent increase in the number of species. Changes in plant species abundance also vary with particularly large increases in trees and shrubs (up to 600%). There has been an increase in abundance of aspen and large changes in other plant communities responding to wetland area increases resulting from permafrost thaw. Populations of herbivores have responded to varying management practices and climate regimes, particularly changing snow conditions. While it is difficult to generalize and scale-up the site-specific changes in ecosystems, this very site-specificity, combined with projections of change, is of immediate relevance to local stakeholders who need to adapt to new opportunities and to respond to challenges. Furthermore, the relatively small area and its unique datasets are a microcosm of the complexity of Arctic landscapes in transition that remains to be documented.

Details

Authors
  • Terry V. Callaghan
  • Christer Jonasson
  • Tomas Thierfelder
  • Zhenlin Yang
  • Henrik Hedenas
  • Margareta Johansson
  • Ulf Molau
  • Rik Van Bogaert
  • Anders Michelsen
  • Johan Olofsson
  • Dylan Gwynn-Jones
  • Stef Bokhorst
  • Gareth Phoenix
  • Jarle W. Bjerke
  • Hans Tommervik
  • Torben Christensen
  • Edward Hanna
  • Eva K. Koller
  • Victoria L. Sloan
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Geography

Keywords

  • subarctic environment, climate change impacts, ecosystem stability
Original languageEnglish
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Volume368
Issue number1624
Publication statusPublished - 2013
Publication categoryResearch
Peer-reviewedYes