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Article Dans Une Revue Nature Ecology & Evolution Année : 2023

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

Evelin Iseli
Chelsea Chisholm
Tim Seipel
Anna Hargreaves
Paul Kardol
Irfan Rashid
Sabine Rumpf
Lohengrin Cavieres
Pervaiz Dar
  • Fonction : Auteur
Bryan Endress
  • Fonction : Auteur
Alejandra Jiménez
  • Fonction : Auteur
Christoph Küffer
  • Fonction : Auteur
Ann Milbau
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John Morgan
  • Fonction : Auteur
Bridgett Naylor
  • Fonction : Auteur
Aníbal Pauchard
Amanda Ratier Backes
Zafar Reshi
  • Fonction : Auteur
Lisa Rew
  • Fonction : Auteur
Damiano Righetti
James Shannon
  • Fonction : Auteur
Graciela Valencia
  • Fonction : Auteur
Neville Walsh
  • Fonction : Auteur
Genevieve Wright
  • Fonction : Auteur
Jake 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.
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Dates et versions

hal-03969878 , version 1 (26-10-2023)



Evelin Iseli, Chelsea Chisholm, Jonathan Lenoir, Sylvia Haider, Tim Seipel, et al.. Rapid upwards spread of non-native plants in mountains across continents. Nature Ecology & Evolution, 2023, ⟨10.1038/s41559-022-01979-6⟩. ⟨hal-03969878⟩
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