Rapid upwards spread of non-native plants in mountains across continents

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Evelin Iseli
  • Chelsea Chisholm
  • Jonathan Lenoir
  • Tim Seipel
  • Agustina Barros
  • Anna L. Hargreaves
  • Paul Kardol
  • Jonas J. Lembrechts
  • Keith McDougall
  • Irfan Rashid
  • Sabine B. Rumpf
  • José Ramón Arévalo
  • Lohengrin Cavieres
  • Curtis Daehler
  • Pervaiz A. Dar
  • Bryan Endress
  • Gabi Jakobs
  • Alejandra Jiménez
  • Christoph Küffer
  • Maritza Mihoc
  • Ann Milbau
  • John W. Morgan
  • Bridgett J. Naylor
  • Aníbal Pauchard
  • Amanda Ratier Backes
  • Zafar A. Reshi
  • Lisa J. Rew
  • Damiano Righetti
  • James M. Shannon
  • Graciela Valencia
  • Neville Walsh
  • Genevieve T. Wright
  • Jake M. Alexander

High-elevation ecosystems are among the few ecosystems worldwide that are not yet heavily invaded by non-native plants. This is expected to change as species expand their range limits upwards to fill their climatic niches and respond to ongoing anthropogenic disturbances. Yet, whether and how quickly these changes are happening has only been assessed in a few isolated cases. Starting in 2007, we conducted repeated surveys of non-native plant distributions along mountain roads in 11 regions from 5 continents. We show that over a 5- to 10-year period, the number of non-native species increased on average by approximately 16% per decade across regions. The direction and magnitude of upper range limit shifts depended on elevation across all regions. Supported by a null-model approach accounting for range changes expected by chance alone, we found greater than expected upward shifts at lower/mid elevations in at least seven regions. After accounting for elevation dependence, significant average upward shifts were detected in a further three regions (revealing evidence for upward shifts in 10 of 11 regions). Together, our results show that mountain environments are becoming increasingly exposed to biological invasions, emphasizing the need to monitor and prevent potential biosecurity issues emerging in high-elevation ecosystems.

Translated title of the contributionRasche Ausbreitung nicht heimischer Pflanzen in Gebirgen über Kontinente hinweg nach oben
Original languageEnglish
JournalNature Ecology and Evolution
Volume7
Issue number3
Pages (from-to)405-413
Number of pages9
ISSN2397-334X
DOIs
Publication statusPublished - 03.2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).

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