, Volume 191, Issue 3, pp 565–578 | Cite as

Rainfall and temperature change drive Arnica montana population dynamics at the Northern distribution edge

  • Jan H. VikaneEmail author
  • Knut Rydgren
  • Eelke Jongejans
  • Vigdis Vandvik
Population ecology – original research


Plant species of semi-natural grasslands are threatened by several simultaneous global change drivers, most notably land-use and climate change. In this study, we explore spatiotemporal variation and changes in deterministic (λ) and stochastic population growth rates (λs), and the underlying vital rates of eight populations of Arnica montana at the species’ north-western range margin in Norway. We assess to what extent variation in the demographic rates could be attributed to environmental correlates of the key global change drivers likely to operate at the range edge, including population size, surrogates of habitat quality, temperature and precipitation. We found no relationship between λ and population size or habitat quality, but λ declined in response to both increasing precipitation and increasing temperature. Life-table response experiments revealed that the temporal variability was driven by survival and clonality, whereas the spatial variation was driven by clonality. Our results suggest that A. montana has a threshold response to increasing precipitation, likely due to adaptations to local climatic conditions. Growth and flowering were both negatively affected by increasing temperature, but these effects had a low influence on the spatiotemporal variability in λ. In contrast, the stochastic growth rate was negatively influenced by climate change, indicating an increased extinction risk for marginal populations, possibly leading to range contraction of A. montana as climate change proceeds. Altogether, our study illustrates how the fates of peripheral populations, which are critically important in species range dynamics, may be affected by both deterministic and stochastic effects of multiple coinciding global change drivers.


Climatic conditions Peripheral populations Stochastic growth rate Vital rates LTRE 



We gratefully acknowledge the landowners that allowed us to use their ground as sampling area. We thank S. Stentvedt, R. Furset, K. S. Vikane and I. S. Vikane for field-work assistance. We also thank two anonymous reviewers whose insightful comments improved the manuscript. Financial support from the Olaf Grolle Olsen endowment is acknowledged.

Author contribution statement

Declaration of authorship: JHV and VV formulated the idea and methodology, JHV conducted the fieldwork, JHV, EJ and KR analyzed the data, JHV wrote the manuscript; other authors provided editorial advice. All authors revised the manuscript critically for important intellectual content; and all authors approved the final version to be published.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interests.

Supplementary material

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Supplementary material 1 (DOCX 145 kb)
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Supplementary material 5 (DOCX 21 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Biological SciencesUniversity of BergenBergenNorway
  2. 2.Department of Science and MathematicsVolda University CollegeVoldaNorway
  3. 3.Department of Environmental SciencesWestern Norway University of Applied SciencesSogndalNorway
  4. 4.Department of Animal Ecology and PhysiologyRadboud UniversityNijmegenThe Netherlands

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